An assembly mechanism for screwing a nut into a lead screw

Abstract

The utility model discloses a nut screw rod's assembly mechanism belongs to screw rod assembly mechanism field, has solved the problem that the material taking mechanism structure is complex, precision requirement is higher and the efficiency of installing nut is lower, and the technical scheme of solving this problem mainly includes clamping mechanism, material taking mechanism, rotating mechanism and guide mechanism, and the guide mechanism includes guide piece and guide driver, and the guide piece is equipped with the guide groove, and the guide driver drives the guide piece to be close to the screw rod to make the guide groove limit the rotation of the nut connected with the screw rod, and the clamping mechanism takes the nut and makes the nut resist the end of the screw rod, and the rotating mechanism drives the screw rod rotation to make the screw rod and the nut thread connection to realize the preinstallation of the nut, and the screw rod rotation drives the nut to slide along the guide groove to complete the installation of the nut. The utility model mainly is used in the control screw rod rotation through rotating mechanism, and the nut is limited to rotate by the guide mechanism, and then relatively the screw rod slides to realize the installation of the nut, can simplify the overall structure of material taking mechanism.

Description

Technical Field

[0001] This utility model demonstrates an assembly mechanism for screwing a nut into a lead screw, belonging to the technical field of lead screw assembly mechanisms. Background Technology

[0002] Linear actuators, also known as electric linear actuators, work primarily by using a motor to drive a lead screw to rotate. A nut is mounted on the lead screw, and as the lead screw rotates, it causes the nut to reciprocate along the lead screw axis.

[0003] In the manufacturing process of linear actuators, a nut must first be installed into a lead screw. In existing technologies, the assembly mechanism of the nut and lead screw involves fixing the lead screw, then using a material-grabbing mechanism to clamp the nut and control its rotation to screw it into the lead screw, thus completing the nut installation. The material-grabbing mechanism in existing technologies needs to control the rotation of the nut while simultaneously driving it to slide along the axis of the lead screw. Therefore, the material-grabbing mechanism requires high precision and has a relatively complex structure. In addition, since the nut is controlled to rotate by the material-grabbing mechanism, the material-grabbing mechanism remains in contact with the nut until the nut is installed. Only after the nut is installed can the material-grabbing mechanism clamp another nut, resulting in low nut installation efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problems of complex structure, high precision requirements and low efficiency in nut installation of the material handling mechanism. To this end, an assembly mechanism for screwing a nut into a lead screw is provided. The lead screw is rotated by a rotating mechanism, and the nut is restricted from rotating by a guiding mechanism, thereby sliding relative to the lead screw to achieve nut installation. This simplifies the overall structure of the material handling mechanism.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An assembly mechanism for screwing a nut into a lead screw includes a clamping mechanism for holding the lead screw, a material-grabbing mechanism for picking up the nut, a rotating mechanism for driving the lead screw to rotate, and a guiding mechanism for restricting the rotation of the nut. The material-grabbing mechanism and the rotating mechanism are located on both sides of the clamping mechanism to correspond to the two ends of the lead screw. The guiding mechanism includes a guide member and a guide driver. The guide member has guide grooves distributed parallel to the circumference of the lead screw. The guide driver drives the guide member to approach the lead screw so that the guide grooves restrict the rotation of the nut connected to the lead screw. The material-grabbing mechanism picks up the nut and presses it against the end of the lead screw. The rotating mechanism drives the lead screw to rotate so that the lead screw and the nut are threadedly connected to each other to achieve the pre-installation of the nut. The rotation of the lead screw causes the nut to slide along the guide groove to complete the installation of the nut.

[0007] The beneficial effects of using this utility model are:

[0008] The assembly mechanism described in this utility model includes a clamping mechanism, a material-picking mechanism, a rotating mechanism, and a guiding mechanism. The material-picking mechanism and the rotating mechanism act on both ends of the lead screw, respectively. The material-picking mechanism clamps the nut and places it against one end of the lead screw. Simultaneously, the guiding driver controls the guiding component to approach the lead screw, placing the nut within the guiding groove. The guiding groove restricts the nut's rotation. The rotating mechanism drives the other end of the lead screw to rotate, allowing the nut to be screwed into the lead screw, completing the pre-installation of the nut and the lead screw. Afterward, the rotating mechanism continues to drive the lead screw to rotate, allowing the nut to slide along the guiding groove, thus achieving the installation of the nut. In the assembly mechanism, the material-picking mechanism provides the nut to the lead screw, the rotating mechanism controls the rotation of the lead screw, and the guiding mechanism guides the nut to slide relative to the lead screw. The process of screwing the nut into the lead screw is broken down into three actions, each performed independently by a separate mechanism. Each mechanism only needs to complete one action, resulting in a relatively simple overall structure and low precision requirements for each mechanism, thus reducing the manufacturing cost of the assembly mechanism. Furthermore, during nut installation, the material handling mechanism only needs to provide pre-tightening force to the nut to complete the pre-installation between the lead screw and the nut before releasing the clamp. The material handling mechanism does not need to participate in the process from the pre-installation position to the completion of installation, allowing it to pick up the next nut during this time. Once the previous nut is installed, the material handling mechanism can quickly provide a nut for the next lead screw, significantly improving nut installation efficiency.

[0009] Preferably, the assembly mechanism further includes a feeding mechanism for providing nuts. The feeding mechanism includes a feeding platform, and the picking mechanism includes a picking claw for gripping the nuts and a first picking driver for driving the picking claw to slide. The first picking driver controls the picking claw to reciprocate between the feeding platform and the lead screw. Using the aforementioned technical solution, the feeding mechanism can continuously supply nuts to the picking mechanism, providing a basis for continuous and rapid installation of the nuts.

[0010] Preferably, the material handling mechanism further includes a fixed base and a second material handling driver fixed to the fixed base. The fixed base is connected to the output end of the first material handling driver, and the output end of the second material handling driver is connected to the material handling claw and drives the material handling claw to move up and down. The fixed base is equipped with a first detector for detecting the descent stroke of the material handling claw. When the nut and the lead screw are pre-installed, the first detector is triggered to stop the descent of the material handling claw and loosen the nut. Using the aforementioned technical solution, the first detector accurately determines whether the nut has been pre-installed based on the descent stroke of the material handling claw, thereby ensuring that when the material handling claw loosens the nut, the nut and the lead screw maintain a stable connection, preventing the nut from detaching from the lead screw and ensuring a more stable and reliable installation of the nut.

[0011] Preferably, the guide includes a fixed plate connected to the output end of the guide driver, and the fixed plate has guide plates on both sides extending toward the lead screw, with a guide groove forming between the two guide plates to restrict the rotation of the nut.

[0012] Preferably, the guide plate is equipped with a second detector for detecting the installation distance of the nut. The nut slides along the screw axis under the constraint of the guide groove and passes the second detector, at which point the rotating mechanism stops rotating to complete the nut installation. Using the aforementioned technical solution, the second detector can accurately detect whether the nut has been installed, allowing the rotating mechanism to promptly control the screw to stop rotating. This ensures the nut is installed correctly while also reducing the time the rotating mechanism spends controlling the screw's rotation, thus improving the nut installation efficiency.

[0013] Preferably, the clamping mechanism includes a jaw, which is rotatably connected to a plurality of circumferentially distributed guide wheels. The jaw clamps the lead screw so that the guide wheels abut against the outer periphery of the lead screw. Using the aforementioned technical solution, the jaw generates rolling friction with the lead screw through the guide wheels, which helps to reduce the frictional force between the lead screw and the jaw, and reduces the possibility of damage to the lead screw and jaw due to friction.

[0014] Preferably, the lead screw has an insertion hole at the end near the rotating mechanism, and the inner wall of the insertion hole has several circumferentially distributed positioning grooves. The rotating mechanism includes a rotating driver and a rotating shaft, and the outer surface of the rotating shaft has positioning protrusions that cooperate with the keyways of the positioning grooves.

[0015] Preferably, the end of the positioning protrusion facing the lead screw has a guide surface. Using the aforementioned technical solution, the guide surface can guide the positioning protrusion into the insertion hole, making the fit between the rotating shaft and the lead screw more precise and reliable.

[0016] Preferably, the rotating shaft is provided with a clearance groove for avoiding the positioning protrusion. The positioning protrusion is movably connected to the clearance groove, and the positioning protrusion is elastically loaded by an elastic element, causing it to maintain a tendency to protrude from the outer surface of the rotating shaft. Using the aforementioned technical solution, after the rotating shaft is inserted into the lead screw, when the positioning protrusion and the positioning groove are misaligned, the positioning protrusion will retract into the clearance groove under the action of the inner wall of the insertion hole. When the rotating shaft rotates until the positioning protrusion and the positioning groove are aligned, the positioning protrusion, no longer restricted by the inner wall of the insertion hole, protrudes from the outer surface of the rotating shaft under the action of the elastic element, allowing the positioning protrusion and the positioning groove to complete a keyway fit, ensuring that the lead screw can rotate with the rotating shaft. The use of a movable positioning protrusion eliminates the need for calibration of the keyway fit between the positioning protrusion and the positioning groove, eliminating special requirements for lead screw installation and significantly improving the installation efficiency of the nut.

[0017] Preferably, the assembly mechanism further includes an indexing plate, and the clamping mechanism includes multiple grippers evenly distributed along the circumference of the indexing plate. A rotating mechanism is located at the bottom of the indexing plate. Using the aforementioned technical solution, the indexing plate can simultaneously clamp multiple lead screws, and the nut installation of each lead screw can be completed in one operation via the indexing plate, enabling assembly line operation and significantly improving the nut installation efficiency.

[0018] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the assembly mechanism for screwing a nut into a lead screw according to the present invention.

[0021] Figure 2 This is a schematic diagram of the material handling mechanism and the guiding mechanism in the assembly mechanism for screwing a nut into a lead screw according to this utility model;

[0022] Figure 3 This is a schematic diagram of the clamping mechanism and the guiding mechanism in the assembly mechanism for screwing a nut into a lead screw according to this utility model;

[0023] Figure 4 This is a schematic diagram of the indexing plate and clamping mechanism in the assembly mechanism for screwing a nut into a lead screw according to the present invention.

[0024] Figure 5 for Figure 4 A magnified view of part A in the middle;

[0025] Figure 6 This is a schematic diagram of the structure of the lead screw and rotating shaft in the assembly mechanism for screwing a nut into a lead screw according to the present invention.

[0026] Reference numerals: 1. Material handling mechanism; 11. Base; 12. First material handling driver; 13. Fixed seat; 14. Second material handling driver; 15. Material handling claw; 16. First detector; 2. Rotation mechanism; 21. Rotation driver; 22. Rotation shaft; 221. Positioning protrusion; 222. Guide surface; 23. Lifting driver; 3. Guide mechanism; 31. Guide driver; 32. Guide component; 321. Guide groove; 33. Second detector; 4. Feeding platform; 5. Clamping mechanism; 51. Fixed plate; 52. Claw; 53. Guide wheel; 6. Indexing plate; 71. Lead screw; 711. Positioning groove; 72. Nut. Detailed Implementation

[0027] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] like Figures 1 to 6 As shown in the figure, this embodiment demonstrates an assembly mechanism for screwing a nut 72 into a lead screw 71. The mechanism includes a clamping mechanism 5 for clamping the lead screw 71, a material-grabbing mechanism 1 for grabbing the nut 72, a rotating mechanism 2 for driving the lead screw 71 to rotate, and a guiding mechanism 3 for restricting the rotation of the nut 72. The material-grabbing mechanism 1 and the rotating mechanism 2 are located on both sides of the clamping mechanism 5 to correspond to the two ends of the lead screw 71. The guiding mechanism 3 includes a guide member 32 and a guide driver 31. The guide member 32 has guide grooves 321 distributed circumferentially parallel to the lead screw 71. The guide driver 31 drives the guide member 32 closer to the lead screw 71 so that the guide grooves 321 restrict the rotation of the nut 72 connected to the lead screw 71. The material-grabbing mechanism 1 grabs the nut 72 and presses it against the end of the lead screw 71. The rotating mechanism 2 drives the lead screw 71 to rotate so that the lead screw 71 and the nut 72 are threadedly connected, thus achieving the pre-installation of the nut 72. The rotation of the lead screw 71 causes the nut 72 to slide along the guide grooves 321 to complete the installation of the nut 72.

[0031] The assembly mechanism described in this embodiment includes a clamping mechanism 5, a material-picking mechanism 1, a rotating mechanism 2, and a guiding mechanism 3. The material-picking mechanism 1 and the rotating mechanism 2 act on both ends of the lead screw 71, respectively. The material-picking mechanism 1 clamps the nut 72 and places it against one end of the lead screw 71. At the same time, the guide driver 31 controls the guide member 32 to approach the lead screw 71, so that the nut 72 is placed in the guide groove 321. The guide groove 321 restricts the rotation of the nut 72. The rotating mechanism 2 drives the other end of the lead screw 71 to rotate, so that the nut 72 can be screwed into the lead screw 71, completing the pre-installation of the nut 72 and the lead screw 71. Afterwards, the rotating mechanism 2 continues to drive the lead screw 71 to rotate, so that the nut 72 can slide along the guide groove 321 to realize the installation of the nut 72. In the assembly mechanism, the material-picking mechanism 1 provides the nut 72 to the lead screw 71, the rotating mechanism 2 controls the rotation of the lead screw 71, and the guiding mechanism... 3. The process of guiding the nut 72 to slide relative to the lead screw 71, i.e., screwing the nut 72 into the lead screw 71, is divided into three actions, each completed independently by a different mechanism. Each mechanism only needs to complete one action, so the overall structure of each mechanism is relatively simple and the precision requirements are not high, which can reduce the manufacturing cost of the assembly mechanism. In addition, during the installation of the nut 72, the material picking mechanism 1 only needs to provide a pre-tightening force to the nut 72 to complete the pre-installation of the lead screw 71 and the nut 72 before releasing the clamp on the nut 72. The material picking mechanism 1 does not need to participate in the process from the pre-installation position to the completion of the installation of the nut 72. Therefore, the material picking mechanism 1 can pick up the next nut 72 during this period. After the previous nut 72 is installed, the material picking mechanism 1 can quickly provide the next lead screw 71 with a nut 72, which can greatly improve the installation efficiency of the nut 72.

[0032] like Figure 1 and Figure 2 As shown, the assembly mechanism in this embodiment also includes a feeding mechanism for providing nuts 72. The feeding mechanism includes a feeding platform 4, and the picking mechanism 1 includes a base 11, a first picking driver 12, a fixed seat 13, a second picking driver 14, and a picking claw 15. The first picking driver 12 is mounted on the base 11, and its output end is fixedly connected to the fixed seat 13. The second picking driver 14 is mounted on the fixed seat 13, and its output end is fixedly connected to the picking claw 15. The base 11 is provided with a slide rail for the fixed seat 13 to slide. The first picking driver 12 controls the fixed seat 13 to reciprocate between the feeding platform 4 and the clamping mechanism 5. The fixed seat 13 is also provided with a slide rail for the picking claw 15 to slide. The second picking driver 14 controls the picking claw 15 to rise and fall.

[0033] The process of the material handling mechanism 1 clamping the nut 72 is as follows: the first material handling driver 12 controls the fixed seat 13 to slide towards the feeding platform 4 until the material handling claw 15 is on the upper side of the feeding platform 4. Then, the second material handling driver 14 controls the material handling claw 15 to descend. After the material handling claw 15 clamps the nut 72, it rises. The first material handling driver 12 pushes the fixed seat 13 to slide towards the clamping mechanism 5 again until the material handling claw 15 is on the upper side of the lead screw 71. Then, the second material handling driver 14 controls the material handling claw 15 to descend, so that the nut 72 abuts against the top of the lead screw 71. The rotating mechanism 2 drives the lead screw 71 to rotate. During this process, the second material handling driver 14 gives the material handling claw 15 a downward preload, so that the nut 72 and the lead screw 71 remain in contact. Therefore, during the rotation of the lead screw 71, the nut 72 will slide downward along the lead screw 71, and the material handling claw 15 will also continue to descend with the nut 72.

[0034] like Figure 2 As shown, in this embodiment, the fixed base 13 is equipped with a first detector 16 for detecting the descent stroke of the picking claw 15. When the nut 72 and the lead screw 71 are pre-installed, the first detector 16 sends a signal to stop the picking claw 15 from descending and loosen the nut 72. At the same time, the rotating mechanism 2 stops rotating. The first detector 16 accurately determines whether the nut 72 has been pre-installed by measuring the descent stroke of the picking claw 15. This ensures that when the picking claw 15 loosens the nut 72, the nut 72 and the lead screw 71 can maintain a stable connection, avoiding the phenomenon of the nut 72 detaching from the lead screw 71, and ensuring that the installation of the nut 72 is more stable and reliable.

[0035] like Figure 3 As shown, in this embodiment, the guide member 32 includes a fixed plate 51 connected to the output end of the guide driver 31. The fixed plate 51 has guide plates extending towards the lead screw 71 on both sides. A guide groove 321 is formed between the two guide plates to restrict the rotation of the nut 72. The guide driver 31 controls the guide member 32 to move closer to or away from the lead screw 71. During the process of the material picking mechanism 1 clamping the nut 72 and moving it towards the lead screw 71, the guide driver 31 controls the guide member 32 to move closer to the lead screw 71. When the nut 72 abuts against the end of the lead screw 71, the nut 72 is in the guide groove 321. The guide plates on both sides of the fixed plate 51 will abut against the outer periphery of the nut 72, thereby restricting the rotation of the nut 72.

[0036] like Figure 3As shown, in this embodiment, the guide plate is equipped with a second detector 33 for detecting the installation distance of the nut 72. When the nut 72 is pre-installed and the picking claw 15 releases the nut 72, the rotating mechanism 2 starts to control the screw 71 to rotate again. At this time, the nut 72 is in the guide groove 321. The two guide plates of the guide member 32 restrict the rotation of the nut 72. Therefore, the nut 72 will slide down along the screw 71 under the action of the screw 71. When the nut 72 passes the second detector 33, the second detector 33 sends a signal to stop the rotating mechanism 2 to complete the installation of the nut 72. The second detector 33 can accurately detect whether the nut 72 has been installed, so that the rotating mechanism 2 can control the screw 71 to stop rotating in time. While ensuring that the nut 72 is installed, it can also reduce the rotation time of the rotating mechanism 2 to control the screw 71, which helps to improve the installation efficiency of the nut 72.

[0037] like Figure 4 and Figure 5 As shown, the assembly mechanism in this embodiment also includes an indexing plate 6, and the clamping mechanism 5 includes a support base. Multiple grippers 52 are provided along the edge of the support base. All grippers 52 are evenly distributed along the circumference of the indexing plate 6. Two guide wheels 53 are rotatably connected to the openings of the grippers 52. Two guide wheels 53 are also rotatably connected to the edge of the support base. When the grippers 52 clamp the lead screw 71, all four guide wheels 53 abut against the outer periphery of the lead screw 71. The abutment of the guide wheels 53 prevents the lead screw 71 from directly contacting the grippers 52 or... The edges of the support base abut against each other, and the guide wheel 53 can form rolling friction with the lead screw 71, which helps to reduce the friction between the lead screw 71 and the clamp 52, and reduce the possibility of damage to the lead screw 71 and the clamp 52 due to friction. In addition, the guide wheel 53 is provided at the opening of the clamp 52. During the installation or removal of the lead screw 71, the guide wheel 53 can guide the lead screw 71 to enter or leave the clamp 52, which can reduce the difficulty of installing and removing the lead screw 71 and help improve the efficiency of installing and removing the lead screw 71.

[0038] It is understandable that in other embodiments, the support seat may also have only one guide wheel 53. When the gripper 52 clamps the lead screw 71, all three guide wheels 53 abut against the outer periphery of the lead screw 71.

[0039] like Figure 5As shown, in this embodiment, the lead screw 71 has an insertion hole at its end near the rotating mechanism 2. The inner wall of the insertion hole has several circumferentially distributed positioning grooves 711. The rotating mechanism 2 includes a lifting driver 23, a rotating driver 21, and a rotating shaft 22. The rotating driver 21 drives the rotating shaft 22 to rotate, and the lifting driver 23 controls the rotating driver 21 to lift or lower, so that the rotating shaft 22 extends into or leaves the insertion hole. The outer surface of the rotating shaft 22 has a positioning protrusion 221 that cooperates with the keyway of the positioning groove 711. The end of the positioning protrusion 221 facing the lead screw 71 has a guide surface 222. The rotating shaft 22 has a clearance groove for avoiding the positioning protrusion 221. The positioning protrusion 221 is movably connected to the clearance groove. The positioning protrusion 221 is elastically loaded by an elastic element to keep the positioning protrusion 221 in place. With a tendency to move protruding from the outer surface of the rotating shaft 22, after the rotating shaft 22 is inserted into the lead screw 71, when the positioning protrusion 221 is misaligned with the positioning groove 711, the positioning protrusion 221 will retract into the clearance groove under the action of the inner wall of the insertion hole. When the rotating shaft 22 rotates until the positioning protrusion 221 and the positioning groove 711 are aligned, the positioning protrusion 221, after being freed from the restriction of the inner wall of the insertion hole, protrudes from the outer surface of the rotating shaft 22 under the action of the elastic element, so that the positioning protrusion 221 and the positioning groove 711 complete the keyway engagement, ensuring that the lead screw 71 can rotate with the rotating shaft 22. The use of a movable positioning protrusion 221 means that the keyway engagement between the positioning protrusion 221 and the positioning groove 711 does not need to be checked, and there are no special requirements for the installation of the lead screw 71, which can significantly improve the installation efficiency of the nut 72.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. An assembly mechanism for screwing a nut into a lead screw, characterized in that, The device includes a clamping mechanism for holding a lead screw, a material-grabbing mechanism for picking up a nut, a rotating mechanism for driving the lead screw to rotate, and a guiding mechanism for restricting the rotation of the nut. The material-grabbing mechanism and the rotating mechanism are located on both sides of the clamping mechanism to correspond to the two ends of the lead screw. The guiding mechanism includes a guide member and a guide driver. The guide member has guide grooves distributed parallel to the circumference of the lead screw. The guide driver drives the guide member to approach the lead screw so that the guide grooves restrict the rotation of the nut connected to the lead screw. The material-grabbing mechanism picks up the nut and presses it against the end of the lead screw. The rotating mechanism drives the lead screw to rotate so that the lead screw and the nut are threadedly connected to each other to achieve the pre-installation of the nut. The rotation of the lead screw drives the nut to slide along the guide groove to complete the installation of the nut.

2. The assembly mechanism for screwing a nut into a lead screw according to claim 1, characterized in that, The assembly mechanism also includes a feeding mechanism for providing nuts. The feeding mechanism includes a feeding platform, and the picking mechanism includes a picking claw for gripping nuts and a first picking driver for driving the picking claw to slide. The first picking driver controls the picking claw to reciprocate between the feeding platform and the lead screw.

3. The assembly mechanism for screwing a nut into a lead screw according to claim 2, characterized in that, The material handling mechanism also includes a fixed base and a second material handling driver fixed to the fixed base. The fixed base is connected to the output end of the first material handling driver, and the output end of the second material handling driver is connected to the material handling claw and drives the material handling claw to move up and down. The fixed base is provided with a first detector for detecting the downward stroke of the material handling claw. When the nut and the lead screw are pre-installed, the first detector is triggered to stop the material handling claw from descending and loosen the nut.

4. The assembly mechanism for screwing a nut into a lead screw according to claim 1, characterized in that, The guide includes a fixed plate connected to the output end of the guide driver, and guide plates extending toward the lead screw on both sides of the fixed plate, with a guide groove forming between the two guide plates to restrict the rotation of the nut.

5. The assembly mechanism for screwing a nut into a lead screw according to claim 4, characterized in that, The guide plate is equipped with a second detector for detecting the installation distance of the nut. The nut slides along the screw axis under the constraint of the guide groove and passes the second detector. Then the rotating mechanism stops rotating to complete the installation of the nut.

6. The assembly mechanism for screwing a nut into a lead screw according to claim 1, characterized in that, The clamping mechanism includes a jaw, which is rotatably connected to a plurality of guide wheels distributed circumferentially. The jaw clamps the lead screw so that the guide wheels abut against the outer periphery of the lead screw.

7. The assembly mechanism for screwing a nut into a lead screw according to claim 1, characterized in that, The lead screw has an insertion hole at its end near the rotating mechanism. The inner wall of the insertion hole has several circumferentially distributed positioning grooves. The rotating mechanism includes a rotating driver and a rotating shaft. The outer surface of the rotating shaft has positioning protrusions that cooperate with the keyways of the positioning grooves.

8. The assembly mechanism for screwing a nut into a lead screw according to claim 7, characterized in that, The positioning protrusion has a guide surface at the end facing the lead screw.

9. The assembly mechanism for screwing a nut into a lead screw according to claim 7, characterized in that, The rotating shaft is provided with a clearance groove for avoiding the positioning protrusion. The positioning protrusion is movably connected to the clearance groove. The positioning protrusion is elastically loaded by an elastic element so that the positioning protrusion maintains the tendency to protrude from the outer surface of the rotating shaft.

10. The assembly mechanism for screwing a nut into a lead screw according to claim 1, characterized in that, The assembly mechanism also includes an indexing plate, and the clamping mechanism includes multiple jaws that are evenly distributed around the circumference of the indexing plate. The rotating mechanism is located at the bottom of the indexing plate.

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