An assembly device for assembling a lead screw, nut, and bearing.

Abstract

This utility model discloses an assembly device for assembling a lead screw, nut, and bearing, belonging to the field of lead screw assembly. It solves the problem of low lead screw production efficiency. The technical solution mainly includes a frame, a nut mounting mechanism, a bearing mounting mechanism, and a lead screw detection mechanism for detecting the position of the lead screw tip. The frame has a slidingly connected mounting seat and a lifting mechanism for driving the mounting seat to rise and fall. A rotating table is provided on the mounting seat, and a clamping mechanism for holding the lead screw is provided on the rotating table. The clamping mechanism includes several clamps distributed circumferentially along the rotating table. The frame has operating positions for installing or removing the lead screw from the clamps. The rotating table rotates so that the lead screw sequentially passes through the operating position, the lead screw detection mechanism, the nut mounting mechanism, the bearing mounting mechanism, and the operating position. This utility model can simultaneously complete the installation of the nut and the bearing, thereby effectively improving the production efficiency of lead screws.

Description

Technical Field

[0001] This utility model discloses an assembly device for assembling a lead screw nut and a bearing, belonging to the field of lead screw assembly technology. 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] The manufacturing process of a linear actuator first requires the assembly of the lead screw, which in turn requires the installation of bearings and nuts. In existing technologies, the installation of bearings and nuts is usually carried out on different assembly equipment. Therefore, the assembly of the lead screw requires two sets of assembly equipment. The lead screw needs to be loaded and unloaded in each set of assembly equipment, which leads to a decrease in the assembly efficiency of the lead screw and affects the production efficiency of the lead screw. In addition, using two sets of assembly equipment increases the cost of the equipment, thereby increasing the manufacturing cost of the lead screw. At the same time, two sets of assembly equipment also occupy more installation space and increase labor costs. Utility Model Content

[0004] The purpose of this invention is to solve the problem of low production efficiency of lead screws. To this end, an assembly device for assembling nuts and bearings for lead screws is provided. This assembly device can simultaneously complete the installation of nuts and bearings, thereby effectively improving the production efficiency of lead screws.

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

[0006] An assembly device for assembling a lead screw, nut, and bearing includes a frame, a nut mounting mechanism, a bearing mounting mechanism, and a lead screw detection mechanism for detecting the position of the lead screw tip. The frame is provided with a slidingly connected mounting base and a lifting mechanism for driving the mounting base to rise and fall. A rotary table is provided on the mounting base, and a clamping mechanism for clamping the lead screw is provided on the rotary table. The clamping mechanism includes several clamps distributed circumferentially along the rotary table. The frame has an operating position for installing or removing the lead screw from the clamps. The rotary table rotates so that the lead screw sequentially passes through the operating position, the lead screw detection mechanism, the nut mounting mechanism, the bearing mounting mechanism, and the operating position.

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

[0008] The assembly equipment described in this utility model includes a lead screw detection mechanism, a nut installation mechanism, and a bearing installation mechanism. A mounting base is provided on the frame, and a rotating table and a clamping mechanism that rotate synchronously with the rotating table are mounted on the mounting base. The rotating table rotates so that the lead screw sequentially passes through the operating position, the lead screw detection mechanism, the nut installation mechanism, the bearing installation mechanism, and back to the operating position. The user installs the lead screw into the clamp at the operating position, completing the lead screw loading. Then, the rotation of the rotating table causes the lead screw to rotate to the lead screw detection mechanism, which detects whether the top of the lead screw has reached the specified height. Since the assembly positions of the nut and bearing are fixed when assembling the lead screw, but the position of the lead screw top changes with the length of the lead screw when using lead screws of different lengths, the lead screw detection mechanism ensures that the nut and bearing can be installed subsequently. Afterward, the lead screw rotates to the nut installation mechanism, where the nut is installed on the lead screw. The screw rotates to the bearing mounting mechanism, where the bearing is installed on the screw. Finally, the screw rotates back to the operating position, and the user disassembles the screw with the nut and bearing installed to complete the screw unloading. This assembly equipment can simultaneously install the nut and bearing, effectively improving screw assembly efficiency and production efficiency. Furthermore, integrating the nut and bearing mounting mechanisms into the same assembly equipment reduces operating and labor costs, minimizes space requirements, and makes the equipment more convenient to use. Additionally, the mounting base can be raised and lowered on the frame via a lifting mechanism, ensuring the top of the screw remains stably at the same height. A screw detection mechanism then ensures that subsequent nuts and bearings are correctly positioned on the screw, allowing the screw feeding mechanism to assemble screws of varying lengths and further expanding its applicability.

[0009] Preferably, the lifting mechanism includes a drive motor, a transmission screw connected to the drive motor, and a transmission nut fixed to the mounting base and connected to the transmission screw. Both sides of the frame are provided with slide rails for lifting the mounting base. The drive motor controls the lifting of the mounting base through the transmission screw and the transmission nut.

[0010] Preferably, the clamp includes a support base and two jaws hinged to the support base. An elastic element is provided between the two jaws to encourage them to move closer together. Guide wheels are rotatably connected to the ends of the jaws, positioned at the opening of the clamp to guide the lead screw's entry or exit. Using the aforementioned technical solution, when the lead screw enters or exits the clamp, the user applies force to the lead screw, causing it to contact the guide wheel and enter or exit the clamp under its guidance. The guide wheel creates rolling friction with the lead screw, reducing the frictional resistance on the lead screw. This reduces the external force required by the user when the lead screw enters or exits the clamp, and also avoids the possibility of the lead screw getting stuck between the jaws and the clamp. This makes the installation and removal of the lead screw more convenient and effortless. Simultaneously, the rolling contact between the lead screw and the guide wheel reduces the possibility of the lead screw being worn or scratched by the jaws. Furthermore, during the installation and removal of the lead screw, the user only needs to manually move the lead screw... Simply push in or pull out the clamps; there's no need to wait for the clamping mechanism to move, allowing for quick installation and removal of the lead screw, significantly improving loading and unloading efficiency. Secondly, the two grippers are held closed by elastic elements, ensuring the lead screw remains positioned in subsequent processes and reducing the likelihood of it falling off. The grippers can also accommodate lead screws of different sizes, broadening the applicability of the clamping mechanism. Furthermore, the clamping mechanism rotates with the rotary table and has several clamps; the rotary table drives multiple clamps to rotate synchronously, enabling continuous loading and improving efficiency, thus significantly increasing lead screw production efficiency.

[0011] Preferably, the rotary table is equipped with two clamping mechanisms, and a support frame is fixed on the rotary table. The two clamping mechanisms are slidably mounted on the support frame and can be raised and lowered along the support frame. The support base is equipped with an adjusting component for adjusting the locking force on the support frame, so that the support base and the support frame are positioned. The clamps of the two clamping mechanisms correspond to each other, and the lead screw is simultaneously clamped by the clamps of the two clamping mechanisms. By adopting the aforementioned technical solution, the lead screw is clamped by two clamps, and the two clamps are spaced apart, which can provide a double positioning point for the lead screw to prevent the lead screw from swinging, which helps to improve the positioning stability of the lead screw and ensure the normal operation of subsequent processes. In addition, using two clamps to clamp the lead screw can provide clamping stability for the lead screw and further reduce the possibility of the lead screw detaching from the clamps.

[0012] Preferably, the support base has at least one guide wheel along its edge, and the clamp holds the lead screw so that the guide wheel abuts against the outer periphery of the lead screw. Using the aforementioned technical solution, when the clamp holds the lead screw, the lead screw abuts against and remains positioned against the multiple guide wheels. The guide wheels can generate rolling friction with the lead screw, which helps reduce the friction between the lead screw and the clamp, reducing the possibility of the threads on the lead screw surface being damaged or scratched due to friction, thus maintaining the accuracy of the lead screw.

[0013] Preferably, the nut installation mechanism includes a feeding mechanism for providing the nut, a picking mechanism for extracting the nut, a guiding mechanism for restricting the rotation of the nut, and a rotating mechanism for driving the lead screw to rotate. The picking mechanism and the rotating mechanism are located at the upper and lower ends of the clamping mechanism, respectively, to correspond to the two ends of the lead screw. The guiding mechanism is close to the lead screw and restricts the rotation of the nut connected to the lead screw. The picking mechanism extracts the nut from the feeding mechanism to the top of the lead screw and makes the nut abut against the top 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 guiding mechanism guides the nut to slide along the axial direction of the lead screw to complete the installation of the nut. Using the aforementioned technical solution, the nut installation mechanism consists of a material-picking mechanism that provides the nut to the lead screw, a rotating mechanism that controls the rotation of the lead screw, and a guiding mechanism that guides the nut to slide relative to the lead screw. This process of screwing the nut into the lead screw is broken down into three actions, each independently performed by one of the three mechanisms. Each mechanism only needs to complete one action, resulting in a relatively simple overall structure and low precision requirements, thus reducing the manufacturing cost of the nut installation mechanism. Furthermore, during nut installation, the material-picking mechanism only needs to provide pre-tightening force to the nut to allow the lead screw and nut to complete pre-installation before releasing the clamp. The material-picking mechanism does not need to participate in the process from the pre-installation position to the completion of installation. Therefore, the material-picking mechanism can pick up the next nut during this period. After the previous nut is installed, the material-picking mechanism can quickly provide a nut for the next lead screw, significantly improving the nut installation efficiency.

[0014] Preferably, the material handling mechanism includes a base, a first material handling driver mounted on the base, a fixed seat, a second material handling driver mounted on the fixed seat, and a material handling claw. The output end of the first material handling driver is connected to the fixed seat. The first material handling driver drives the material handling claw to reciprocate between the feeding mechanism and the clamping mechanism through the fixed seat. The second material handling driver drives the material handling claw to move up and down.

[0015] Preferably, the mounting base is equipped with a first detector for detecting the descent stroke of the picking claw. When the nut and the lead screw are pre-installed, the first detector is triggered to stop the picking claw from descending 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 picking claw, thereby ensuring that the nut and lead screw maintain a stable connection when the picking claw loosens the nut, preventing the nut from detaching from the lead screw, and ensuring a more stable and reliable nut installation.

[0016] Preferably, the feeding mechanism includes a first feeding tray for storing nuts, the first feeding tray having a first feeding channel extending toward the picking mechanism, the end of the first feeding channel forming a first feeding platform, and the picking claw reciprocating between the first feeding platform and the clamping mechanism.

[0017] Preferably, the guiding mechanism includes a guide member and a guide driver that drives the guide member to move closer to or away from the clamping mechanism. The guide member has a guide groove on its side closer to the clamping mechanism. The nut is positioned within the guide groove and abuts against the groove wall, thus restricting its rotation. The guide member is equipped with a second detector for detecting the nut's installation distance. After the nut slides along the screw axial direction under the restriction of the guide groove and passes the second detector, 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 reducing the time the rotating mechanism spends controlling the screw's rotation, thus improving the nut installation efficiency.

[0018] 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. The outer surface of the rotating shaft has a positioning protrusion that mates with the keyway of the positioning groove. The end of the positioning protrusion facing the lead screw has a guide surface. The rotating shaft has 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 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 is misaligned with the positioning groove, 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 out of the outer surface of the rotating shaft under the action of the elastic element, so that the positioning protrusion and the positioning groove complete the keyway engagement, 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 engagement between the positioning protrusion and the positioning groove, and there are no special requirements for the installation of the lead screw, which can significantly improve the installation efficiency of the nut.

[0019] Preferably, the bearing mounting mechanism includes a second feeding tray for providing bearings, a feeding mechanism for clamping bearings, and a pressing mechanism for pressing bearings into the lead screw. The second feeding tray has a second feeding channel extending to the feeding mechanism, and the end of the second feeding channel forms a second feeding platform. The feeding mechanism includes a feeding driver and a feeding robot. The feeding driver drives the feeding robot to reciprocate between the second feeding platform and the pressing mechanism to transfer the bearing to the top of the lead screw. The pressing mechanism includes a pressing driver and a pressing rod. The pressing driver drives the pressing rod to descend and act on the bearing to complete the fitting of the bearing and the lead screw.

[0020] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of an assembly device for assembling a lead screw, nut, and bearing according to the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of an assembly device for assembling a lead screw, nut, and bearing according to the present invention. Figure 2 :

[0024] Figure 3 This is a schematic diagram of the nut mounting mechanism and clamping mechanism in an assembly equipment for screw assemblies and bearings according to this utility model.

[0025] Figure 4 This is a schematic diagram of the nut installation mechanism in an assembly device for a lead screw assembling a nut and a bearing, according to the present invention.

[0026] Figure 5 This is a schematic diagram of the guiding mechanism and clamping mechanism in an assembly equipment for assembling a lead screw, nut, and bearing according to the present invention.

[0027] Figure 6 This is a schematic diagram of the clamping mechanism and rotating mechanism in an assembly equipment for assembling a lead screw, nut, and bearing according to the present invention.

[0028] Figure 7 for Figure 6 A magnified view of part A in the middle;

[0029] Figure 8 This is a schematic diagram of the structure of the lead screw and rotating shaft in the assembly equipment for assembling a lead screw, nut, and bearing according to the present invention.

[0030] Figure 9 This is a schematic diagram of the frame structure in an assembly equipment for assembling a lead screw, nut, and bearing according to the present invention.

[0031] Figure 10 This is a schematic diagram of the second feeding tray and the feeding mechanism in the assembly equipment for assembling a lead screw, nut, and bearing according to the present invention.

[0032] Reference numerals: 1. Frame; 11. Drive motor; 12. Lead screw; 13. Slide rail; 131. Limit block; 14. Lead screw detection mechanism; 2. Mounting base; 21. Rotary table; 22. Support frame; 221. Support rod; 222. Fixing plate; 3. Rotation mechanism; 31. Rotation driver; 32. Lifting driver; 33. Rotation shaft; 331. Positioning protrusion; 332. Guide surface; 4. Clamping mechanism; 41. Support base; 42. Gripper; 43. Elastic element; 44. Guide wheel; 45. Adjusting element; 5. Nut mounting mechanism; 51. Material handling mechanism; 511. Base; 512. First material handling driver; 513. Fixing base; 514. Second material handling driver; 515. Picking claw; 516. First detector; 52. Feeding mechanism; 521. First feeding tray; 522. First feeding channel; 523. First feeding platform; 53. Guiding mechanism; 531. Guiding driver; 532. Guide component; 533. Second detector; 534. Guide groove; 6. Bearing mounting mechanism; 61. Second feeding tray; 611. Second feeding channel; 612. Second feeding platform; 613. Lifting driver; 62. Loading mechanism; 621. Loading driver; 622. Loading robot; 63. Pressing mechanism; 631. Pressing driver; 632. Press rod; 71. Lead screw; 711. Positioning groove; 72. Nut; 73. Bearing. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] like Figures 1 to 10 As shown in the figure, this embodiment demonstrates an assembly device for assembling a lead screw 71 with a nut 72 and a bearing 73. The device includes a frame 1, a nut mounting mechanism 5, a bearing mounting mechanism 6, and a lead screw detection mechanism 14 for detecting the position of the top end of the lead screw 71. The frame 1 is provided with a slidingly connected mounting base 2 and a lifting mechanism for driving the mounting base 2 to rise and fall. The mounting base 2 is provided with a rotating table 21, and the rotating table 21 is provided with a clamping mechanism 4 for clamping the lead screw 71. The clamping mechanism 4 includes several clamps distributed circumferentially along the rotating table 21. The frame 1 has an operating position for installing or removing the lead screw 71 from the clamps. The rotating table 21 rotates so that the lead screw 71 passes sequentially through the operating position, the lead screw detection mechanism 14, the nut mounting mechanism 5, the bearing mounting mechanism 6, and the operating position.

[0037] The assembly equipment described in this embodiment includes a lead screw detection mechanism 14, a nut installation mechanism 5, and a bearing installation mechanism 6. A mounting base 2 is provided on the frame 1, and a rotating platform 21 and a clamping mechanism 4 that rotates synchronously with the rotating platform 21 are provided on the mounting base 2. The rotating platform 21 rotates so that the lead screw 71 sequentially passes through the operating position, the lead screw detection mechanism 14, the nut installation mechanism 5, the bearing installation mechanism 6, and back to the operating position. The user installs the lead screw 71 into the clamp in the operating position, completing the feeding of the lead screw 71. Then, through the rotation of the rotating platform 21, the lead screw 71 is rotated to the desired position. The lead screw detection mechanism 14 detects whether the top end of the lead screw 71 has reached the specified height. Since the assembly positions of the nut 72 and bearing 73 are fixed when assembling the lead screw 71, the position of the top end of the lead screw 71 changes with the length of the lead screw 71 when using lead screws of different lengths. The lead screw detection mechanism 14 ensures that the nut 72 and bearing 73 can be installed subsequently. Afterwards, the lead screw 71 rotates to the nut installation mechanism 5, which then completes the installation of the nut 72 on the lead screw 71. In step 2, the lead screw 71 rotates to the bearing mounting mechanism 6, where the bearing 73 is installed on the lead screw 71. Finally, the lead screw 71 rotates back to the operating position, and the user disassembles the lead screw 71 after the nut 72 and bearing 73 are assembled, thus completing the unloading of the lead screw 71. This assembly equipment can simultaneously install the nut 72 and bearing 73, effectively improving the assembly efficiency and production efficiency of the lead screw 71. Furthermore, integrating the nut mounting mechanism 5 and the bearing mounting mechanism 6 into the same assembly equipment allows for… Reducing the operating and labor costs of the assembly equipment also reduces the space occupied by the equipment, making it more convenient to use. In addition, the mounting base 2 can be raised and lowered on the frame 1 through the lifting mechanism, so that the top of the lead screw 71 can be stably kept at the same height. Then, the lead screw detection mechanism 14 ensures that the subsequent nut 72 and bearing 73 can be assembled onto the lead screw 71 in the correct position, so that the lead screw 71 feeding mechanism 62 can assemble more lead screws 71 of different lengths, further improving the applicability of the lead screw 71 feeding mechanism 62.

[0038] like Figure 1 and Figure 2As shown, in this embodiment, the frame 1 is generally rectangular, and a mounting base 2 is slidably connected inside the frame 1. A rotating platform 21 is mounted on the mounting base 2, meaning the rotating platform 21 can slide relative to the frame 1 along with the mounting base 2. Slide rails 13 are provided on both side walls of the frame 1, distributed vertically. The mounting base 2 is slidably connected to the slide rails 13. A drive motor 11 is mounted on the frame 1, and a transmission component is provided between the drive motor 11 and the mounting base 2. The drive motor 11 drives the mounting base 2 to move up and down along the slide rails 13 via the transmission component. Since the assembly positions of the nut 72 and bearing 73 are fixed when assembling the lead screw 71, but different... When the length of the lead screw 71 is adjusted, the position of the top end of the lead screw 71 will change inversely with the length of the lead screw 71. The mounting base 2 is raised and lowered by the drive motor 11 and the transmission component, so that the top end of the lead screw 71 can be stably kept at the same height, so as to facilitate the subsequent assembly of the nut 72 and the bearing 73. This allows the lead screw 71 feeding mechanism 62 to assemble more lead screws 71 of different lengths, further improving the applicability of the lead screw 71 feeding mechanism 62. In addition, in order to prevent the mounting base 2 from disengaging from the slide rail 13, the frame 1 in this embodiment is provided with a slide rail 13 for the mounting base 2 to slide. Both ends of the slide rail 13 are provided with limit blocks 131 to prevent the mounting base 2 from disengaging from the slide rail 13.

[0039] In this embodiment, the drive motor 11 is fixed to the top of the frame 1. The transmission components include a transmission screw 12 and a transmission nut 72 fixed to the mounting base 2. The two ends of the transmission screw 12 are rotatably connected to the top and bottom of the frame 1, respectively. The transmission screw 12 passes through the clamping mechanism 4 and the rotary table 21 from the top of the frame 1 and is rotatably connected to the bottom of the frame 1. The output end of the drive motor 11 is connected to a reduction mechanism. The top of the transmission screw 12 is connected to a coupling. The drive motor 11 is connected to the coupling through the reduction mechanism. The drive motor 11 drives the transmission screw 12 to rotate. Since the mounting base 2 is slidably connected to the slide rail 13 of the frame 1, and the slide rail 13 also restricts the rotation of the frame 1, the transmission nut 72 will slide along the axial direction of the screw 71 under the action of the transmission screw 12, thereby driving the mounting base 2 to rise and fall.

[0040] like Figure 1 and Figure 2As shown, the rotary table 21 in this embodiment includes a rotating platform, a cam divider, and a servo motor. The output end of the servo motor is connected to the input end of the cam divider. The cam divider is fixed to the bottom of the rotating platform. The servo motor drives the rotating platform to rotate through the cam divider. The cam divider converts the continuous rotational motion of the servo motor into the intermittent rotation of the rotating platform, thereby ensuring that the lead screw 71 can remain stationary when assembling the nut 72 and the bearing 73. At the same time, the servo motor does not need to be repeatedly started and stopped, avoiding damage to the servo motor due to repeated start and stop. In this embodiment, a transmission wheel is fixed to the output end of the servo motor, and a transmission wheel is also fixed to the input end of the cam divider. A transmission belt is fitted between the two transmission wheels, and the servo motor transmits power to the cam divider through the transmission belt.

[0041] like Figure 6 and Figure 7 As shown, the clamping mechanism 4 in this embodiment includes a support base 41. Two grippers 42 are hinged to the edge of the support base 41. An elastic element 43 is provided between the two grippers 42 to encourage them to move closer together. The two grippers 42 and the edge of the support base 41 form a clamp. The clamping mechanism 4 has four clamps, evenly distributed around the circumference of the rotary table 21. Guide wheels 44 are rotatably connected to the ends of the grippers 42. The guide wheels 44 are positioned at the opening of the clamp to guide the lead screw 71 into or out of the clamp. When the lead screw 71 enters or leaves the clamp, the user applies force to it. The lead screw 71 contacts the guide wheel 44 and enters or leaves the clamp under its guidance. The guide wheel 44 can generate rolling friction with the lead screw 71, thereby reducing the frictional resistance on the lead screw 71. This reduces the external force required by the user when the lead screw 71 enters or leaves the clamp, and also avoids the possibility of the lead screw 71 getting stuck between the grippers 42 and the lead screw 71. This design makes the installation and removal of the lead screw 71 more convenient and labor-saving. The rolling contact between the lead screw 71 and the guide wheel 44 also reduces the possibility of wear or scratching of the lead screw 71 by the gripper 42. Furthermore, during the installation and removal of the lead screw 71, the user only needs to push the lead screw 71 into or pull it out of the clamp by hand, without waiting for the clamping mechanism 4 to move, allowing for quick installation and removal of the lead screw 71 and significantly improving the feeding and unloading efficiency of the lead screw 71. Secondly, the two grippers 42 are kept closed by the elastic element 43, ensuring that the lead screw 71 remains positioned in subsequent processes and is less likely to fall off. The two grippers 42 can also accommodate lead screws 71 of different sizes, helping to broaden the applicability of the clamping mechanism 4. Moreover, the clamping mechanism 4 rotates with the rotary table 21 and has several clamps. The rotary table 21 drives multiple clamps to rotate synchronously, enabling continuous feeding and improving efficiency, thereby significantly increasing the production efficiency of the lead screw 71.

[0042] In this embodiment, the rotary table 21 is provided with two clamping mechanisms 4, and a support frame 22 is fixed on the rotary table 21. The support frame 22 includes at least two support rods 221, which are arranged vertically. The support base 41 is provided with through holes for the support rods 221 to pass through. The support base 41 is positioned on the support rods 221. The rotary table 21 drives the support base 41 to rotate through the support rods 221. The support bases 41 of the two clamping mechanisms 4 are positioned vertically at intervals on the support frame 22, and the clamps of the two clamping mechanisms 4 are corresponding, that is, the clamp of the upper clamping mechanism 4 is directly above the clamp of the lower clamping mechanism 4. When the lead screw 71 is installed into the clamp, the same lead screw 71 is clamped by the two clamps at the same time, and the lead screw 71 is parallel to the support plate, keeping the lead screw 71 in a vertical state, ensuring that the nut 72 and the bearing 73 can be assembled smoothly.

[0043] In this embodiment, two clamps are used to hold the same lead screw 71, and the two clamps are spaced apart. This provides a double positioning point for the lead screw 71, preventing it from swaying and improving its positioning stability, thus ensuring the normal operation of subsequent processes. Furthermore, using two clamps to hold the lead screw 71 provides clamping stability and further reduces the possibility of the lead screw 71 detaching from the clamps. Additionally, the presence of at least two support rods 221 ensures that the support base 41 does not rotate relative to the support rods 221, allowing the support base 41 to rotate synchronously with the rotary table 21, enabling continuous feeding and high efficiency. Moreover, the positioning of the support base 41 by multiple support rods 221 helps to keep the support base 41 as horizontal as possible, reducing its tilt angle and making the clamping mechanism 4's gripping of the lead screw 71 more stable and reliable.

[0044] It should be noted that the support frame 22 in this embodiment includes four support rods 221 and a connecting plate fixed to the top of the support rods 221. The four support rods 221 are circumferentially distributed, and the connecting plate is circular and connected to the top of the four support rods 221. The connecting plate can position the four support rods 221, keep the spacing between the four support rods 221 the same, and reduce the sway amplitude of the support rods 221, thereby improving the positioning stability of the support rods 221 on the clamping mechanism 4.

[0045] It is understandable that in other embodiments, the number of support rods 221 may also be three or more.

[0046] In addition, the support base 41 in this embodiment is provided with an adjusting member 45 for locking the support rod 221. The adjusting member 45 includes a clamp connected to it. The support rod 221 passes through the through hole of the support base 41 and also passes through the clamp. The clamp is adjusted by fasteners. When it is necessary to adjust the distance between the two support bases 41, the clamp is loosened by fasteners, so that the clamp releases the locking of the support rod 221, so that the support base 41 can slide along the support rod 221. When the support base 41 slides to a specified height, the clamp is tightened by fasteners, so that the clamp locks the support rod 221, thereby realizing the positioning of the support rod 221 and the support base 41. The support base 41 and the support rod 221 are slidably connected, which can adjust the distance between the two clamping mechanisms 4, so that the two clamping mechanisms 4 can clamp lead screws 71 of different lengths, which helps to improve the applicability of the clamping mechanism 4.

[0047] like Figure 2 and Figure 3 As shown, the nut installation mechanism 5 in this embodiment includes a feeding mechanism 52 for providing the nut 72, a picking mechanism 51 for extracting the nut 72, a guiding mechanism 53 for restricting the rotation of the nut 72, and a rotating mechanism 3 for driving the lead screw 71 to rotate. The picking mechanism 51 and the rotating mechanism 3 are located at the upper and lower ends of the clamping mechanism 4, respectively, corresponding to the two ends of the lead screw 71. The guiding mechanism 53 is close to the lead screw 71 and restricts the rotation of the nut 72 connected to the lead screw 71. The picking mechanism 51 extracts the nut 72 from the feeding mechanism 52 to the top of the lead screw 71 and makes the nut 72 abut against the top of the lead screw 71. The rotating mechanism 3 drives the lead screw 71 to rotate so that the lead screw 71 and the nut 72 are threadedly connected to each other to achieve the pre-installation of the nut 72. The guiding mechanism 53 guides the nut 72 to slide along the axial direction of the lead screw 71 to complete the installation of the nut 72. In the nut installation mechanism 5, the picking mechanism 51 provides the nut 72 to the lead screw 71, and the rotating mechanism 3 controls the lead screw 71. The rotation and guiding mechanism 53 guides the nut 72 to slide relative to the lead screw 71, thus breaking down the process of screwing the nut 72 into the lead screw 71 into three actions, each independently completed by one of the three mechanisms. Therefore, each mechanism only needs to complete one action, resulting in a relatively simple overall structure and low precision requirements, which reduces the manufacturing cost of the nut installation mechanism 5. Furthermore, during the installation of the nut 72, the material-picking mechanism 51 only needs to provide pre-tightening force to the nut 72 to complete the pre-installation between the lead screw 71 and the nut 72 before releasing the clamp on the nut 72. The material-picking mechanism 51 does not need to participate in the process from the pre-installation position to the completion of installation. Therefore, the material-picking mechanism 51 can pick up the next nut 72 during this period. After the previous nut 72 is installed, the material-picking mechanism 51 can quickly provide the next lead screw 71 with a nut 72, significantly improving the installation efficiency of the nut 72.

[0048] like Figure 2 and Figure 3As shown, the feeding mechanism 52 in this embodiment includes a first feeding tray 521 for storing nuts 72. The first feeding tray 521 has a first feeding channel 522 extending toward the picking mechanism 51. The end of the first feeding channel 522 forms a first feeding platform 523. The user stores the nuts 72 in the first feeding tray 521, and the first feeding tray 521 guides the nuts 72 inside to the first feeding channel 522. The nuts 72 move through the first feeding channel 522 to the first feeding platform 523 for the picking mechanism 51 to pick up.

[0049] The material handling mechanism 51 described in this embodiment includes a base 511, a first material handling driver 512, a fixed base 513, a second material handling driver 514, and a material handling claw 515. The first material handling driver 512 is mounted on the base 511, and its output end is fixedly connected to the fixed base 513. The second material handling driver 514 is mounted on the fixed base 513, and its output end is fixedly connected to the material handling claw 515. The base 511 is provided with a slide rail 13 for the fixed base 513 to slide. The first material handling driver 512 controls the fixed base 513 to reciprocate between the feeding platform and the clamping mechanism 4. The fixed base 513 is also provided with a slide rail 13 for the material handling claw 515 to slide. The second material handling driver 514 controls the material handling claw 515 to rise and fall.

[0050] The process of the material handling mechanism 51 clamping the nut 72 is as follows: the first material handling driver 512 controls the fixed seat 513 to slide towards the feeding platform until the material handling claw 515 is on the upper side of the feeding platform. Then, the second material handling driver 514 controls the material handling claw 515 to descend. After the material handling claw 515 clamps the nut 72, it rises. The first material handling driver 512 pushes the fixed seat 513 to slide towards the clamping mechanism 4 again until the material handling claw 515 is on the upper side of the lead screw 71. Then, the second material handling driver 514 controls the material handling claw 515 to descend, so that the nut 72 abuts against the top of the lead screw 71. The rotating mechanism 3 drives the lead screw 71 to rotate. During this process, the second material handling driver 514 gives the material handling claw 515 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 down along the lead screw 71, and the material handling claw 515 will also continue to descend with the nut 72.

[0051] like Figure 4As shown, in this embodiment, the fixed base 513 is equipped with a first detector 516 for detecting the descent stroke of the picking claw 515. When the nut 72 and the lead screw 71 are pre-installed, the first detector 516 sends a signal to stop the picking claw 515 from descending and loosen the nut 72. At the same time, the rotating mechanism 3 stops rotating. The first detector 516 accurately determines whether the nut 72 has been pre-installed by measuring the descent stroke of the picking claw 515. This ensures that when the picking claw 515 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.

[0052] like Figure 5 As shown, the guiding mechanism 53 in this embodiment includes a guide member 532 and a guide driver 531 that drives the guide member 532 to move closer to or away from the clamping mechanism 4. The guide driver 531 controls the guide member 532 to move closer to or away from the lead screw 71. The guide member 532 has a guide groove 534 on the side closer to the clamping mechanism 4. During the process of the material picking mechanism 51 clamping the nut 72 and moving it towards the lead screw 71, the guide driver 531 controls the guide member 532 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 534. The nut 72 is in the guide groove 534 and abuts against the groove wall of the guide groove 534, thus restricting its rotation. In addition, the guide member 532 is provided with a second detector 533 for detecting the installation distance of the nut 72. When the nut 72 After pre-installation is completed and the pick-up claw 515 releases the nut 72, the rotating mechanism 3 restarts the control screw 71 to rotate. At this time, the nut 72 is in the guide groove 534. The two guide plates of the guide member 532 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 533, the second detector 533 sends a signal to stop the rotating mechanism 3 to complete the installation of the nut 72. The second detector 533 can accurately detect whether the nut 72 has been installed, so that the rotating mechanism 3 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 3 to control the rotation of the screw 71, which helps to improve the installation efficiency of the nut 72.

[0053] like Figure 6 and Figure 8As shown, in this embodiment, the lead screw 71 has an insertion hole at its end near the rotating mechanism 3. The inner wall of the insertion hole has several circumferentially distributed positioning grooves 711. The rotating mechanism 3 includes a lifting driver 32, a rotating driver 31, and a rotating shaft 33. The rotating driver 31 drives the rotating shaft 33 to rotate. The lifting driver 32 is fixed to the mounting base 2 and controls the rotating driver 31 to lift and lower, so that the rotating shaft 33 extends into or leaves the insertion hole. The outer surface of the rotating shaft 33 has a positioning protrusion 331 that mates with the keyway of the positioning groove 711. The positioning protrusion 331 has a guide surface 332 facing the end of the lead screw 71. The rotating shaft 33 has a clearance groove for avoiding the positioning protrusion 331. The positioning protrusion 331 is movably connected to the clearance groove. The positioning protrusion 331 is elastically loaded by the elastic member 43 to make the positioning protrusion 331... The positioning protrusion 331 maintains its tendency to protrude from the outer surface of the rotating shaft 33. After the rotating shaft 33 is inserted into the lead screw 71, when the positioning protrusion 331 is misaligned with the positioning groove 711, the positioning protrusion 331 will retract into the clearance groove under the action of the inner wall of the insertion hole. When the rotating shaft 33 rotates until the positioning protrusion 331 is aligned with the positioning groove 711, the positioning protrusion 331, after being freed from the restriction of the inner wall of the insertion hole, protrudes from the outer surface of the rotating shaft 33 under the action of the elastic element 43, so that the positioning protrusion 331 and the positioning groove 711 complete the keyway engagement, ensuring that the lead screw 71 can rotate with the rotating shaft 33. The use of a movable positioning protrusion 331 means that the keyway engagement between the positioning protrusion 331 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.

[0054] like Figure 9 and Figure 10As shown, the bearing mounting mechanism 6 in this embodiment includes a second feeding tray 61 for providing bearings 73, a feeding mechanism 62 for clamping bearings 73, and a pressing mechanism 63 for pressing bearings 73 into lead screws 71. The second feeding tray 61 has a second feeding channel 611 extending to the feeding mechanism 62, and the end of the second feeding channel 611 forms a second feeding platform 612. The feeding mechanism 62 includes a feeding driver 621 and a feeding robot 622. The feeding driver 621 drives the feeding robot 622 to... The second feeding platform 612 and the pressing mechanism 63 reciprocate to transfer the bearing 73 to the top of the lead screw 71. The pressing mechanism 63 includes a pressing driver 631 and a pressing rod 632. The pressing driver 631 drives the pressing rod 632 to descend and act on the bearing 73 to complete the assembly of the bearing 73 and the lead screw 71. The installation process of the bearing 73 is as follows: the user places the bearing 73 into the second feeding tray 61, and the second feeding tray 61 guides the bearing 73 inside to the second feeding channel 611. The bearing 73 moves to the second feeding platform 612 via the second feeding channel 611 for clamping by the feeding mechanism 62. The bottom of the second feeding platform 612 is equipped with a lifting driver 613. When the lead screw 71, after the nut 72 is installed, rotates with the rotary table 21 to below the pressing mechanism 63, the lifting driver 613 lifts the bearing 73 on the second feeding platform 612. The feeding driver 621 controls the feeding robot 622 to approach the second feeding platform 612 and clamp the bearing. 73 is clamped, and then the bearing 73 is transferred to the top of the lead screw 71. The press-fit driver 631 drives the pressure rod 632 to descend and act on the bearing 73. When the pressure rod 632 presses down on the bearing 73, the bearing 73 is fitted into the lead screw 71 to complete the installation of the bearing 73. After the installation of the bearing 73 is completed, the lead screw 71 rotates again with the rotary table 21 to the operating position. The user can remove the lead screw 71 from the clamping mechanism 4 by hand and install a new lead screw 71 to be assembled to complete the unloading and loading of the lead screw 71.

[0055] 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 device for assembling a lead screw, a nut, and a bearing, characterized in that, The device includes a frame, a nut mounting mechanism, a bearing mounting mechanism, and a lead screw detection mechanism for detecting the position of the lead screw tip. The frame has a slidingly connected mounting base and a lifting mechanism for driving the mounting base to rise and fall. The mounting base has a rotary table, and the rotary table has a clamping mechanism for clamping the lead screw. The clamping mechanism includes several clamps distributed circumferentially along the rotary table. The frame has an operating position for installing or removing the lead screw from the clamps. The rotary table rotates so that the lead screw passes through the operating position, the lead screw detection mechanism, the nut mounting mechanism, the bearing mounting mechanism, and the operating position in sequence.

2. The assembly equipment for assembling a lead screw nut and bearing according to claim 1, characterized in that, The lifting mechanism includes a drive motor, a transmission screw connected to the drive motor, and a transmission nut fixed to the mounting base and connected to the transmission screw. Both sides of the frame are provided with slide rails for lifting the mounting base. The drive motor controls the lifting of the mounting base through the transmission screw and the transmission nut.

3. The assembly equipment for assembling a lead screw nut and bearing according to claim 1, characterized in that, The clamp includes a support base and two jaws hinged to the support base. An elastic element is provided between the two jaws to make the two jaws tend to move closer to each other. The ends of the jaws are rotatably connected to guide wheels, which are located at the opening of the clamp to guide the lead screw to enter or disengage.

4. The assembly equipment for assembling a lead screw nut and a bearing according to claim 3, characterized in that, The rotating platform is equipped with two clamping mechanisms, and a support frame is fixed on the rotating platform. The two clamping mechanisms are slidably installed on the support frame and can be raised and lowered along the support frame. The support seat is equipped with an adjusting component for adjusting the locking force on the support frame so that the support seat and the support frame are positioned. The clamps of the two clamping mechanisms correspond to each other, and the lead screw is simultaneously clamped by the clamps of the two clamping mechanisms.

5. The assembly equipment for assembling a lead screw nut and a bearing according to claim 3, characterized in that, The support base is provided with at least one guide wheel along its edge, and the clamp holds the lead screw so that the guide wheel abuts against the outer periphery of the lead screw.

6. The assembly equipment for assembling a lead screw nut and a bearing according to claim 1, characterized in that, The nut installation mechanism includes a feeding mechanism for providing the nut, a picking mechanism for extracting the nut, a guiding mechanism for restricting the rotation of the nut, and a rotating mechanism for driving the lead screw to rotate. The picking mechanism and the rotating mechanism are located at the upper and lower ends of the clamping mechanism, respectively, to correspond to the two ends of the lead screw. The guiding mechanism is close to the lead screw and restricts the rotation of the nut connected to the lead screw. The picking mechanism extracts the nut from the feeding mechanism to the top of the lead screw and makes the nut abut against the top 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 guiding mechanism guides the nut to slide along the axial direction of the lead screw to complete the installation of the nut.

7. The assembly equipment for assembling a lead screw nut and a bearing according to claim 6, characterized in that, The material handling mechanism includes a base, a first material handling driver mounted on the base, a fixed seat, a second material handling driver mounted on the fixed seat, and a material handling claw. The output end of the first material handling driver is connected to the fixed seat. The first material handling driver drives the material handling claw to reciprocate between the feeding mechanism and the clamping mechanism through the fixed seat. The second material handling driver drives the material handling claw to move up and down.

8. The assembly equipment for assembling a lead screw nut and a bearing according to claim 7, characterized in that, The fixed base is equipped with a first detector for detecting the descent stroke of the picking claw. When the nut and the lead screw are pre-installed, the first detector is triggered to stop the picking claw from descending and loosen the nut.

9. The assembly equipment for assembling a lead screw nut and a bearing according to claim 7, characterized in that, The feeding mechanism includes a first feeding tray for storing nuts, the first feeding tray having a first feeding channel extending toward the picking mechanism, the end of the first feeding channel forming a first feeding platform, and the picking claw reciprocating between the first feeding platform and the clamping mechanism.

10. The assembly equipment for assembling a lead screw nut and a bearing according to claim 6, characterized in that, The guiding mechanism includes a guide member and a guide driver that drives the guide member to move closer to or away from the clamping mechanism. The guide member has a guide groove on the side closer to the clamping mechanism. The nut is located in the guide groove and abuts against the groove wall, thus restricting its rotation. The guide member is equipped with a second detector for detecting the installation distance of the nut. After the nut slides along the screw axis under the restriction of the guide groove and passes the second detector, the rotating mechanism stops rotating to complete the installation of the nut.

11. The assembly equipment for assembling a lead screw nut and a bearing 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 a positioning protrusion that mates with the keyway of the positioning groove. The end of the positioning protrusion facing the lead screw has a guide surface. The rotating shaft has 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 a tendency to protrude from the outer surface of the rotating shaft.

12. The assembly equipment for assembling a lead screw nut and bearing according to claim 1, characterized in that, The bearing mounting mechanism includes a second feeding tray for providing bearings, a feeding mechanism for clamping bearings, and a pressing mechanism for pressing bearings into a lead screw. The second feeding tray has a second feeding channel extending to the feeding mechanism, and the end of the second feeding channel forms a second feeding platform. The feeding mechanism includes a feeding driver and a feeding robot. The feeding driver drives the feeding robot to reciprocate between the second feeding platform and the pressing mechanism to transfer the bearing to the top of the lead screw. The pressing mechanism includes a pressing driver and a pressing rod. The pressing driver drives the pressing rod to descend and act on the bearing to complete the mounting of the bearing and the lead screw.

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