Automatic assembling equipment for planetary roller screw rod

Abstract

The invention relates to the technical field of assembly equipment, and discloses planetary roller lead screw automatic assembly equipment which comprises a bottom table, and a platform frame used for supporting nut assembly is arranged in the middle of the top end of the bottom table; and the nut preassembling mechanism is arranged on the platform frame and is used for positioning a nut and preassembling an inner gear ring when the planetary roller screw rod is assembled. By adding and arranging an adaptive uniform distribution mechanism, when a planetary roller screw rod is assembled, firstly, under the action of centrifugal force, a ball head connecting rod drives a splicing seat to move outwards, so that an external thread on the outer wall of the splicing seat is in accurate contact with a roller thread, and primary adaptation of a roller and a nut thread is realized; when the driving motor drives the mounting column to rotate, the splicing seat synchronously rotates along with the mounting column, the rollers are driven to rotate through thread meshing, the rollers can be further evenly distributed in the nut, meshing consistency of threads of the rollers, the nut and threads of the lead screw can be guaranteed, and guarantee is provided for follow-up transmission stability.

Description

Technical Field

[0001] This invention relates to the field of assembly equipment technology, specifically to an automated assembly equipment for planetary roller screws. Background Technology

[0002] Planetary roller screws are core mechanical components with high-precision transmission performance, widely used in fields with stringent motion control accuracy requirements. This device, based on a planetary layout design, achieves efficient conversion between rotary and linear motion. Its core components include a main screw, nut, planetary roller assembly, internal gear ring, and cage. The main screw, as the core power transmission carrier, forms a precise mesh with the surrounding rollers through its external thread structure. The nut, through its internal thread, engages with the rollers, forming a complete transmission closed loop. The internal gear ring and cage respectively constrain the roller motion trajectory and provide uniform distribution, ensuring that multiple threaded rollers can stably complete planetary motion around the main screw.

[0003] The multi-component collaborative structure of this planetary roller screw determines the decisive impact of the assembly process on overall performance. In actual production, the assembly quality of the planetary roller screw directly affects transmission accuracy, operational stability, and service life. However, the current mainstream manual assembly method has significant limitations: manual operation not only relies on the operator's experience and judgment, leading to low assembly efficiency, but also makes it difficult to meet precision assembly requirements. Due to the extremely small clearance between the rollers and the threaded grooves, positioning deviations are prone to occur during manual insertion, making it impossible to guarantee precise meshing between the rollers and the screw and nut threads. At the same time, manual operation makes it difficult to control the distribution of multiple rollers inside the nut, easily leading to uneven roller spacing, which in turn causes force imbalance during transmission, exacerbates component wear, and ultimately affects the overall transmission performance of the planetary roller screw. Therefore, those skilled in the art have proposed an automated assembly device for planetary roller screws to solve the above-mentioned technical problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automated assembly equipment for planetary roller screws, which solves the problem that manual assembly cannot guarantee the meshing accuracy of the rollers, screws, and nuts.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automated assembly equipment for planetary roller screws, comprising, The base has a platform frame at the top center for supporting nut assembly. The nut pre-assembly mechanism, which is set on the platform frame, is used to position the nut and pre-assemble the internal gear ring during the assembly of the planetary roller screw. The assembly and positioning mechanism is set on the platform frame and is used to assemble and position the rollers inside the pre-positioned nut. The adaptation and distribution mechanism is set on the base platform and is used to adapt and distribute the outer wall thread of the roller and the inner wall thread of the nut after the positioning and assembly mechanism has been processed. The lead screw insertion mechanism is set on the base platform and is used to insert the lead screw into the nut after it has been processed by the adaptive uniform distribution mechanism.

[0006] Preferably, the nut pre-installation mechanism includes a pre-installation seat, which is provided at the top center of the platform frame. The pre-installation seat has a positioning cavity inside, and the bottom end of the positioning cavity penetrates the platform frame and extends downward. Multiple positioning posts are arranged in a circumferential array near the edge of the top of the positioning cavity. Transverse vibrators are provided on both sides of the lower middle part of the outer wall of the pre-installation seat, and longitudinal vibrators are provided at the middle of the front and rear sides of the top of the platform frame.

[0007] Preferably, the assembly positioning mechanism includes a hydraulic base, with a hydraulic base located at the rear center of the top of the base platform. A hydraulic lifting seat, which is hydraulically driven to move up and down, is mounted on the hydraulic base. A mounting plate is rotatably connected to the center of one side of the bottom end of the hydraulic lifting seat. A drive motor is located at the center of one side of the top end of the hydraulic lifting seat, and the output end of the drive motor passes through the hydraulic lifting seat and is connected to the center of the mounting plate.

[0008] Preferably, the assembly positioning mechanism further includes a mounting column. The mounting column is fixedly connected to the bottom center of the mounting plate. The mounting column is provided with an adapter, a positioning part, and a connecting part from top to bottom. The outer wall of the adapter is provided with a silicone film sleeve that is resistant to the high temperature generated by rotational friction. The inner wall of the silicone film sleeve and the outer wall of the mounting column corresponding to the adapter form an annular air chamber. A miniature air pump for inflating the annular air chamber is provided inside the part of the adapter corresponding to the mounting column. An exhaust valve is provided on one side of the upper middle part of the outer wall of the connecting part.

[0009] Preferably, the adapter distribution mechanism includes a storage channel, and multiple sets of storage channels are circumferentially arrayed at the position of the adapter part corresponding to the position of the mounting column outer wall. Ball joints are slidably connected inside the multiple sets of storage channels. The adapter part is composed of multiple splicing seats. The outer ends of the multiple sets of ball joints are respectively connected to the corresponding positions of the inner walls of the splicing seats. The outer walls of the splicing seats are all provided with external threads that match the threads of the outer walls of the rollers.

[0010] Preferably, the lead screw insertion mechanism includes a lifting seat, which is provided at the top center of the base platform. Four hydraulic cylinders are equidistantly arranged around the center of the base platform. The top ends of the cylinder rods are connected to corresponding positions of the lifting seat. Positioning brackets are slidably connected around the top of the lifting seat.

[0011] Preferably, the lead screw insertion mechanism further includes a guide half-sleeve. A guide half-sleeve is provided at the rear middle part of the top of the lifting seat. A connecting rod is fixedly connected to the upper and lower sides of the middle part of the outer wall of the guide half-sleeve. The end of the connecting rod away from the guide half-sleeve is connected to the corresponding position of the hydraulic base. A sliding half-sleeve is provided at the middle of the front side of the guide half-sleeve. T-shaped slide bars are slidably connected to both sides of the front end of the guide half-sleeve. The rear sides of the sliding half-sleeve are connected to the T-shaped slide bars at the corresponding positions. Threaded walls are provided on the inner walls of both the sliding half-sleeve and the guide half-sleeve.

[0012] Preferably, the lead screw insertion mechanism further includes a main lead screw, the top center of the lifting seat is provided with the main lead screw, and the threaded wall on the outer wall of the main lead screw matches the threaded wall on the inner wall of the sliding half sleeve and the guide half sleeve. The top center of the main lead screw is provided with an end cap, and the bottom center of the connecting part is provided with a matching cavity that matches the shape of the end cap.

[0013] Working Principle: During the assembly of the planetary roller screw, the nut pre-assembly mechanism is activated first. The operator removes the nut from the planetary roller screw and places it into the pre-assembly seat on the platform frame. After the nut enters the positioning cavity within the pre-assembly seat, it is positioned by the positioning pins at various locations within the cavity. Once the nut is positioned, the operator places the internal gear ring into the nut. Then, the longitudinal vibrator on the platform frame and the transverse vibrator on the pre-assembly seat are activated simultaneously, generating a multi-directional, multi-angle vibration on the internal gear ring within the nut. This ensures the internal gear ring completely settles into the bottom of the nut, guaranteeing the balance and fit of the pre-assembled internal gear ring. This completes the positioning of the nut and the pre-assembly of the internal gear ring during the planetary roller screw assembly. Next, the assembly positioning mechanism is activated. After the nut and internal gear ring are pre-assembled in the planetary roller screw, the operator inserts a uniform distribution frame into the nut and inserts each roller into the uniform distribution frame. Simultaneously, the hydraulic base on the platform is activated, and the hydraulic lifting seat on the controller descends. This descent of the hydraulic lifting seat drives the mounting plate and mounting column to descend synchronously. Before the bottom of the mounting column enters the pre-installed mounting column, the worker removes the evenly distributed frame from the nut accessories, allowing the positioning part of the mounting column to properly enter the nut in the pre-installed mounting seat. Simultaneously, as the positioning part on the mounting column enters the nut accessories in the pre-installed seat, the micro air pump inside the mounting column is activated, filling the annular inflation chamber with gas. As the gas content in the annular inflation chamber increases, the silicone diaphragm on the mounting column expands. This expansion also positions the rollers inside the nut for positioning. Due to the annular design of the silicone diaphragm and the uniformity of its inflation, the rollers, evenly distributed near the inner wall of the nut, are positioned under the guidance of the expanding silicone diaphragm, thus completing the assembly and positioning of the rollers inside the nut.After the adaptation and distribution mechanism is activated, and the rollers inside the nut are positioned by the assembly and positioning mechanism, the exhaust valve on the connecting part is activated. As the exhaust valve is activated, the gas in the annular inflation chamber is slowly discharged. At the same time, the hydraulic base controls the hydraulic lifting seat on it to descend synchronously. As the gas in the annular inflation chamber is continuously discharged, the silicone diaphragm sleeve on the mounting column also shrinks and resets synchronously. At this time, due to the gradual reduction in the volume of the silicone diaphragm sleeve, the contact friction between the outer wall of the silicone diaphragm sleeve and the rollers inside the nut also decreases. Therefore, when the hydraulic lifting seat moves down and drives the mounting column to move down synchronously, the frictional resistance is small, and the uniform distribution of the assembly rollers inside the nut can be ensured. When the adapter part on the mounting column is completely inserted into the nut inside the pre-installed seat, the hydraulic lifting seat stops moving down. At this time, the drive motor on the hydraulic lifting seat is activated. The shaft of the drive motor rotates and drives the hydraulic lifting seat. The mounting plate rotates synchronously, and while the mounting plate rotates under the drive, it also drives the mounting column at its bottom to rotate synchronously. As the mounting column rotates, due to the influence of centrifugal force, the ball joint connecting rod inside the storage channel on the mounting column is thrown outward. As the ball joint connecting rod slides outward, it drives the splicing seat on it to move outward, so that the external thread on the splicing seat contacts and matches the outer wall of the rollers at various positions inside the nut. Then, as the mounting column continues to rotate, it drives the splicing seat on it to rotate synchronously. Due to the influence of the external thread on the splicing seat and the threaded wall on the roller, the splicing seat also drives the rollers at various positions inside the nut to rotate synchronously. As the rollers rotate continuously, the rollers are evenly distributed inside the nut, which also ensures the consistency of the rollers in subsequent use, thus completing the adaptation and distribution treatment of the rollers inside the nut.Simultaneously, the lead screw insertion mechanism is activated. During the operation of the matching and evenly distributing mechanism, the hydraulic lifting platform drives the mounting plate and mounting column on it to insert into the nut and slowly move downwards. As the mounting column moves downwards, the end cap on the main lead screw enters the matching cavity at the bottom of the connecting part. With the activation of the matching and evenly distributing mechanism, the operator loosens the positioning bracket on the lifting platform. Then, as the mounting column rotates, it drives the end cap to rotate synchronously through the matching cavity at the bottom of the connecting part. Simultaneously, the end cap rotates, driving the main lead screw at its bottom to rotate synchronously. After the matching and evenly distributing mechanism evenly distributes the rollers inside the nut, the hydraulic base on the platform controls the hydraulic lifting platform to move upwards. Simultaneously, the hydraulic lifting platform drives the mounting plate and its bottom mounting column to move upwards synchronously. At the same time, the hydraulic cylinder on the platform is activated synchronously, and the cylinder rod extends outwards. Simultaneously, the lifting seat and main screw on it move upwards in sync, allowing the main screw to enter the nut inside the pre-installed seat. The mounting column moves upwards, separating from the rollers inside the nut, and simultaneously enters the main screw from the bottom for connection. The rotation of the main screw then redistributes and verifies the rollers assembled inside the nut. During the upward rotation of the main screw, a sleeve composed of a sliding half-sleeve and a guide half-sleeve ensures the stability of the main screw's rotation. Before upward movement, the sliding half-sleeve and guide half-sleeve also ensure vertical guidance of the main screw before assembly, thus completing the insertion of the screw into the nut. After the main screw enters the nut inside the pre-installed seat, the operator can sequentially assemble the planetary carrier, internal gear ring, and retaining ring on the upper part of the nut. Finally, the nut is sealed and locked, completing the assembly and processing of the planetary roller screw.

[0014] This invention provides an automated assembly equipment for planetary roller screws. It has the following advantages: 1. By adding and setting a nut pre-assembly mechanism, this invention enables precise positioning of the nut components during the assembly of planetary roller screws. This is achieved through the positioning cavity in the pre-assembly seat and the positioning pins in the circumferential array, preventing the nut from shifting during assembly and providing a stable reference for subsequent component assembly. On the other hand, the synergistic effect of the transverse and longitudinal vibrators generates omnidirectional vibration, causing the internal gear ring to fall smoothly into the bottom of the nut and fit tightly. This ensures the balance of the pre-assembly of the internal gear ring and reduces gaps or tilting problems that may occur during manual placement, laying a good foundation for subsequent roller assembly.

[0015] 2. By adding and setting an assembly positioning mechanism, this invention not only enables precise lifting and lowering of the mounting column through a hydraulic lifting seat during the assembly of the planetary roller screw, ensuring its smooth entry into the nut, but also uses a micro air pump to inflate the annular inflation chamber, causing the silicone diaphragm to expand uniformly. This creates a flexible wrapping and positioning of the rollers inside the nut. This method avoids damage to the roller surface caused by rigid contact and utilizes the annular structure and uniform inflation of the silicone diaphragm to guide the rollers to be evenly distributed along the inner wall of the nut, effectively solving the problem of roller misalignment and uneven distribution during manual positioning.

[0016] 3. By adding and setting an adaptive distribution mechanism, when assembling the planetary roller screw, the ball joint connecting rod of the present invention first moves the splicing seat outward under the action of centrifugal force, so that the external thread of the outer wall of the splicing seat makes precise contact with the roller thread, realizing the initial adaptation of the roller and nut thread. Secondly, when the drive motor drives the mounting column to rotate, the splicing seat rotates synchronously with it, and drives the roller to rotate through thread engagement. This not only allows the roller to be further evenly distributed in the nut, but also ensures the consistency of the engagement between the roller thread and the nut and screw thread, providing a guarantee for the stability of subsequent transmission.

[0017] 4. By adding and setting a lead screw insertion mechanism, this invention provides vertical guidance for the lead screw during the assembly of the planetary roller lead screw through the cooperation of the guide half and the sliding half, ensuring its coaxiality during insertion and avoiding tilting damage to the threads. It also uses a hydraulic cylinder to drive the lifting seat to rise, which, together with the mounting column, drives the lead screw to rotate synchronously, so that the lead screw gradually engages with the roller threads during insertion, realizing secondary verification and fine adjustment of the roller distribution. At the same time, the positioning bracket can fix the position of the lead screw, and the cooperation between the end cover and the matching cavity ensures the synchronicity of the lead screw rotation, further improving the assembly accuracy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front structure of the present invention; Figure 2 This is a schematic diagram of the rear structure of the present invention; Figure 3 This is a partial structural diagram of the pre-mounted base of the present invention; Figure 4 This is a partial structural diagram of the hydraulic lifting seat of the present invention; Figure 5 This is a partial structural diagram of the mounting column of the present invention; Figure 6 This is a partial cross-sectional view of the interior of the mounting column of the present invention; Figure 7 This is a partial structural diagram of the adapter part in use according to the present invention; Figure 8 This is a schematic diagram of the splicing base structure of the present invention; Figure 9 This is a partial structural diagram of the mounting column of the present invention; Figure 10 This is a partial structural diagram of the main lead screw of the present invention.

[0019] The components are as follows: 1. Base platform; 2. Positioning bracket; 3. Sliding half-sleeve; 4. Platform frame; 5. Longitudinal vibrator; 6. Pre-installation seat; 7. Connecting part; 8. Adaptor part; 9. Mounting plate; 10. Drive motor; 11. Hydraulic lifting seat; 12. Mounting column; 13. Positioning part; 14. Positioning cavity; 15. Transverse vibrator; 16. Connecting rod; 17. Main screw; 18. Lifting seat; 19. Hydraulic cylinder; 20. Hydraulic base; 21. Guide half-sleeve; 22. Positioning column; 23. Matching cavity; 24. Exhaust valve; 25. Miniature air pump; 26. Silicone diaphragm sleeve; 27. Annular inflation cavity; 28. External thread; 29. ​​Splicing seat; 30. Ball joint connecting rod; 31. Storage channel; 32. T-shaped slide bar; 33. End cap. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see the appendix Figure 1 - Appendix Figure 2 This invention provides an automated assembly equipment for planetary roller screws, including a base 1, and a platform frame 4 for supporting nut assembly is provided at the top center of the base 1. Please see the appendix Figure 3 The nut pre-assembly mechanism is set on the platform frame 4 and is used to position the nut and pre-assemble the internal gear ring during the assembly of the planetary roller screw. The nut pre-installation mechanism includes a pre-installation seat 6. The pre-installation seat 6 is located at the top center of the platform frame 4. The pre-installation seat 6 has a positioning cavity 14 inside. The bottom end of the positioning cavity 14 passes through the platform frame 4 and extends downward. The top of the positioning cavity 14 has a circumferential array of multiple positioning posts 22 near the edge. The lower middle part of the outer wall of the pre-installation seat 6 is provided with transverse vibrators 15 on both sides. The top front and rear sides of the platform frame 4 are provided with longitudinal vibrators 5.

[0022] When the nut pre-assembly mechanism is started, the staff takes out the nut accessory from the planetary roller screw and puts it into the pre-assembly seat 6 on the platform frame 4. After the nut accessory enters the positioning cavity 14 in the pre-assembly seat 6, the nut accessory is positioned by the positioning pins 22 at various positions in the positioning cavity 14. After the nut accessory in the positioning cavity 14 is positioned, the staff puts the internal gear ring into the nut accessory.

[0023] Then, the longitudinal vibrator 5 on the platform frame 4 and the transverse vibrator 15 on the pre-installation seat 6 are started synchronously, thereby generating a full-range, multi-angle vibration on the internal gear ring inside the nut, so that the internal gear ring inside the nut falls completely into the bottom of the nut, while also ensuring the balance and fit of the pre-installed internal gear ring inside the nut, thus completing the positioning of the nut and the pre-installation of its internal gear ring during the assembly of the planetary roller screw.

[0024] Please see the appendix Figure 4 - Appendix Figure 6 The assembly positioning mechanism is set on the platform frame 4 and is used to assemble and position the rollers inside the pre-positioned nut. The assembly positioning mechanism includes a hydraulic base 20. The hydraulic base 20 is located at the rear center of the top of the base 1. A hydraulic lifting seat 11, which is hydraulically driven to move up and down, is located on the hydraulic base 20. A mounting plate 9 is rotatably connected to the center of one side of the bottom end of the hydraulic lifting seat 11. A drive motor 10 is located at the center of one side of the top end of the hydraulic lifting seat 11. The output end of the drive motor 10 passes through the hydraulic lifting seat 11 and is connected to the center of the mounting plate 9.

[0025] When the assembly positioning mechanism is started, after the nut and internal gear ring in the planetary roller screw are pre-installed, the operator inserts the uniform distribution frame into the inside of the nut and inserts each roller into the uniform distribution hole of the uniform distribution frame. At the same time, the hydraulic base 20 on the base 1 is started. When the hydraulic base 20 is started, the hydraulic lifting seat 11 on the controller is lowered. When the hydraulic lifting seat 11 is lowered, it drives the mounting plate 9 and mounting column 12 on it to lower synchronously. Before the bottom end of the mounting column 12 enters the mounting column 12 in the pre-installation seat 6, the operator takes out the uniform distribution frame from the nut accessories, so that the positioning part 13 of the mounting column 12 can normally enter the nut in the pre-installation seat 6.

[0026] The assembly positioning mechanism also includes a mounting column 12. The mounting column 12 is fixedly connected to the bottom center of the mounting plate 9. The mounting column 12 is provided with an adapter part 8, a positioning part 13 and a connecting part 7 from top to bottom. The outer wall of the adapter part 8 is provided with a silicone film sleeve 26 that is resistant to the high temperature generated by rotational friction. The inner wall of the silicone film sleeve 26 and the outer wall of the mounting column 12 corresponding to the adapter part 8 form an annular air chamber 27. The part of the adapter part 8 corresponding to the mounting column 12 is provided with a miniature air pump 25 to inflate the annular air chamber 27. An exhaust valve 24 is provided on one side of the upper middle part of the outer wall of the connecting part 7.

[0027] Simultaneously, when the positioning part 13 on the mounting column 12 enters the nut fitting inside the pre-mounted seat 6, the micro air pump 25 inside the mounting column 12 starts synchronously. The micro air pump 25 fills the annular inflation chamber 27 with gas. As the gas content in the annular inflation chamber 27 increases, the silicone diaphragm sleeve 26 on the mounting column 12 expands. As the silicone diaphragm sleeve 26 expands, it also positions the rollers inside the nut. Due to the annular design of the silicone diaphragm sleeve 26 and the uniformity of its inflation, the rollers that are evenly distributed inside the nut and close to its inner wall are positioned under the guidance of the expanding silicone diaphragm sleeve 26, thereby completing the assembly and positioning of the rollers inside the nut.

[0028] Please see the appendix Figure 7 - Appendix Figure 9 The adaptation and even distribution mechanism is set on the base 1 and is used to adapt and evenly distribute the outer wall thread of the roller and the inner wall thread of the nut after the positioning and assembly mechanism is processed. The adapter distribution mechanism includes a storage channel 31. Multiple sets of storage channels 31 are arranged in a circular array on the outer wall of the mounting column 12 corresponding to the position of the adapter part 8. Ball head connecting rods 30 are slidably connected inside the multiple sets of storage channels 31. The adapter part 8 is composed of multiple splicing seats 29. The outer ends of the multiple sets of ball head connecting rods 30 are respectively connected to the corresponding positions on the inner wall of the splicing seat 29. The outer wall of the splicing seat 29 is provided with an external thread 28 that matches the thread of the outer wall of the roller.

[0029] When the uniform distribution mechanism is activated, after the rollers inside the nut are positioned by the assembly positioning mechanism, the exhaust valve 24 on the connecting part 7 is activated. As the exhaust valve 24 is activated, the gas in the annular inflation chamber 27 is slowly discharged. At the same time, the hydraulic base 20 controls the hydraulic lifting seat 11 on it to descend synchronously. As the gas in the annular inflation chamber 27 is continuously discharged, the silicone diaphragm sleeve 26 on the mounting column 12 also shrinks and resets synchronously. At this time, due to the gradual reduction in the volume of the silicone diaphragm sleeve 26, the contact friction between the outer wall of the silicone diaphragm sleeve 26 and the rollers inside the nut also decreases. Therefore, when the hydraulic lifting seat 11 moves down and drives the mounting column 12 on it to move down synchronously, the frictional resistance is small, and the uniform distribution of the assembled rollers inside the nut can be ensured.

[0030] When the adapter 8 on the mounting column 12 is fully inserted into the nut inside the pre-installed seat 6, the hydraulic lifting seat 11 stops moving downward. At this time, the drive motor 10 on the hydraulic lifting seat 11 starts. The rotating shaft of the drive motor 10 drives the mounting plate 9 on the hydraulic lifting seat 11 to rotate synchronously. While the mounting plate 9 is driven to rotate, it drives the mounting column 12 at its bottom to rotate synchronously. While the mounting column 12 is rotating, due to the influence of centrifugal force, the ball joint connecting rod 30 inside the receiving channel 31 on the mounting column 12 is thrown outward. While the ball joint connecting rod 30 slides outward, it drives the splicing seat 29 on it to move outward, so that the external thread 28 on the splicing seat 29 contacts and matches the outer wall of the rollers at various positions inside the nut.

[0031] Then, as the mounting post 12 rotates continuously, the mounting post 12 drives the splicing seat 29 on it to rotate synchronously. Due to the influence of the external thread 28 on the splicing seat 29 and the threaded wall on the roller, the splicing seat 29 will also drive the rollers in various positions inside the nut to rotate synchronously. As the rollers rotate continuously, the rollers are evenly distributed inside the nut, which also ensures the consistency of the rollers in subsequent use, thereby completing the adaptation and distribution of the rollers inside the nut.

[0032] Please see the appendix Figure 10 The lead screw insertion mechanism is set on the base platform 1 and is used to insert the lead screw into the nut after it has been processed by the adaptive uniform distribution mechanism.

[0033] The lead screw insertion mechanism includes a lifting seat 18. The lifting seat 18 is provided at the top center of the base platform 1. Four hydraulic cylinders 19 are equidistantly arranged around the center of the base platform 1. The top of the rod of the hydraulic cylinder 19 is connected to the corresponding position of the lifting seat 18. Positioning brackets 2 are slidably connected around the top of the lifting seat 18.

[0034] When the lead screw insertion mechanism is started, while the matching distribution mechanism is running, the hydraulic lifting seat 11 drives the mounting plate 9 and mounting column 12 on it to insert into the nut and move down slowly. As the mounting column 12 moves down, the end cap 33 on the main lead screw 17 enters the matching cavity 23 at the bottom of the connecting part 7.

[0035] As the adaptation and distribution mechanism starts operating, the staff loosens the positioning bracket 2 on the lifting seat 18. Then, during the rotation of the mounting column 12, the end cover 33 is driven to rotate synchronously through the matching cavity 23 at the bottom of the connecting part 7. While the end cover 33 is rotating, the main screw 17 at its bottom is driven to rotate synchronously. After the adaptation and distribution mechanism distributes the rollers in the nut evenly, the hydraulic base 20 on the base platform 1 controls the hydraulic lifting seat 11 on it to move upward. While the hydraulic lifting seat 11 moves upward, it drives the mounting plate 9 and the mounting column 12 at its bottom to move upward synchronously.

[0036] The lead screw insertion mechanism also includes a main lead screw 17. The main lead screw 17 is provided at the top center of the lifting seat 18, and the threaded wall on the outer wall of the main lead screw 17 matches the threaded wall on the inner wall of the sliding half sleeve 3 and the guide half sleeve 21. An end cap 33 is provided at the top center of the main lead screw 17, and a matching cavity 23 matching the shape of the end cap 33 is provided at the bottom center of the connecting part 7.

[0037] Simultaneously, the hydraulic cylinder 19 on the base platform 1 is activated, and the rod of the hydraulic cylinder 19 is pushed out. As the rod of the hydraulic cylinder 19 is pushed out, it drives the lifting seat 18 and the main screw 17 on it to move upward synchronously, so that the main screw 17 enters the nut in the pre-installed seat 6. At the same time, the mounting column 12 moves upward and separates from the rollers in the nut, and enters the main screw 17 through the bottom to connect. Thus, the rotation of the main screw 17 re-distributes and verifies the rollers assembled in the nut.

[0038] The lead screw insertion mechanism also includes a guide half sleeve 21. The guide half sleeve 21 is provided at the top middle and rear part of the lifting seat 18. The upper and lower sides of the middle part of the outer wall of the guide half sleeve 21 are fixedly connected to the connecting rod 16. The end of the connecting rod 16 away from the guide half sleeve 21 is connected to the corresponding position of the hydraulic base 20. The middle of the front side of the guide half sleeve 21 is provided with a sliding half sleeve 3. The front two sides of the guide half sleeve 21 are slidably connected to T-shaped slide bars 32. The rear two sides of the sliding half sleeve 3 are connected to the T-shaped slide bars 32 at the corresponding positions. The inner walls of the sliding half sleeve 3 and the guide half sleeve 21 are both provided with threaded walls.

[0039] Furthermore, during the upward rotation of the main lead screw 17, the sliding half sleeve 3 and the guide half sleeve 21 form a sleeve, which can ensure the stability of the main lead screw 17 during the upward movement. Before the upward movement, the cooperation between the sliding half sleeve 3 and the guide half sleeve 21 can also ensure the vertical guidance of the main lead screw 17 before assembly, thereby completing the penetration treatment of the lead screw inside the nut.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated assembly equipment for planetary roller screws, characterized in that, include, The base (1) has a platform frame (4) at the top center for supporting nut assembly. The nut pre-assembly mechanism is set on the platform frame (4) and is used to position the nut and pre-assemble the internal gear ring during the assembly of the planetary roller screw. The assembly positioning mechanism is set on the platform frame (4) and is used to assemble and position the rollers inside the nut after pre-positioning. The adapting and evenly distributing mechanism is set on the base (1) and is used to adapt and evenly distribute the outer wall thread of the roller and the inner wall thread of the nut after the positioning and assembly mechanism is processed. The lead screw insertion mechanism is set on the base (1) and is used to insert the lead screw into the nut after it has been processed by the adaptable uniform distribution mechanism.

2. The automated assembly equipment for planetary roller screws according to claim 1, characterized in that, The nut pre-installation mechanism includes a pre-installation seat (6). The pre-installation seat (6) is provided at the top center of the platform frame (4). The pre-installation seat (6) has a positioning cavity (14) inside. The bottom end of the positioning cavity (14) passes through the platform frame (4) and extends downward. The top of the positioning cavity (14) has a circumferential array of multiple positioning columns (22) near the edge. The lower middle part of the outer wall of the pre-installation seat (6) is provided with transverse vibrators (15) on both sides. The top front and rear sides of the platform frame (4) are provided with longitudinal vibrators (5).

3. The automated assembly equipment for planetary roller screws according to claim 1, characterized in that, The assembly positioning mechanism includes a hydraulic base (20). The hydraulic base (20) is located at the rear center of the top of the base (1). The hydraulic base (20) is equipped with a hydraulic lifting seat (11) that is hydraulically driven to move up and down. The bottom side of the hydraulic lifting seat (11) is rotatably connected to a mounting plate (9). The top side of the hydraulic lifting seat (11) is equipped with a drive motor (10). The output end of the drive motor (10) passes through the hydraulic lifting seat (11) and is connected to the center of the mounting plate (9).

4. The automated assembly equipment for planetary roller screws according to claim 3, characterized in that, The assembly positioning mechanism also includes a mounting column (12). The mounting column (12) is fixedly connected to the middle of the bottom end of the mounting plate (9). The mounting column (12) is provided with an adapter (8), a positioning part (13) and a connecting part (7) from top to bottom. The outer wall of the adapter (8) is provided with a silicone film sleeve (26) that is resistant to high temperature generated by rotational friction. The inner wall of the silicone film sleeve (26) and the outer wall of the mounting column (12) corresponding to the adapter (8) form an annular air chamber (27). The part of the adapter (8) corresponding to the mounting column (12) is provided with a miniature air pump (25) for inflating the annular air chamber (27). An exhaust valve (24) is provided on one side of the upper middle part of the outer wall of the connecting part (7).

5. The automated assembly equipment for planetary roller screws according to claim 4, characterized in that, The adapter distribution mechanism includes a storage channel (31). The outer wall of the mounting column (12) is arranged in a circumferential array with multiple sets of storage channels (31) corresponding to the position of the adapter part (8). Ball head connecting rods (30) are slidably connected inside the multiple sets of storage channels (31). The adapter part (8) is composed of multiple splicing seats (29). The outer ends of the multiple sets of ball head connecting rods (30) are respectively connected to the corresponding positions of the inner walls of the splicing seats (29). The outer walls of the splicing seats (29) are all provided with external threads (28) that match the threads of the outer wall of the roller.

6. The automated assembly equipment for planetary roller screws according to claim 5, characterized in that, The lead screw insertion mechanism includes a lifting seat (18). The lifting seat (18) is provided at the top center of the base (1). Four hydraulic cylinders (19) are equidistantly arranged around the center of the base (1). The top of the rod of the hydraulic cylinder (19) is connected to the corresponding position of the lifting seat (18). Positioning brackets (2) are slidably connected around the top of the lifting seat (18).

7. The automated assembly equipment for planetary roller screws according to claim 6, characterized in that, The lead screw insertion mechanism also includes a guide half sleeve (21). The guide half sleeve (21) is provided at the middle and rear of the top of the lifting seat (18). The upper and lower sides of the middle of the outer wall of the guide half sleeve (21) are fixedly connected to a connecting rod (16). The end of the connecting rod (16) away from the guide half sleeve (21) is connected to the corresponding position of the hydraulic base (20). The middle of the front side of the guide half sleeve (21) is provided with a sliding half sleeve (3). T-shaped slide bars (32) are slidably connected to both sides of the front end of the guide half sleeve (21). The rear sides of the sliding half sleeve (3) are connected to the T-shaped slide bars (32) at the corresponding positions. The inner walls of the sliding half sleeve (3) and the guide half sleeve (21) are both provided with threaded walls.

8. The automated assembly equipment for planetary roller screws according to claim 7, characterized in that, The lead screw insertion mechanism also includes a main lead screw (17). The main lead screw (17) is provided at the top center of the lifting seat (18), and the threaded wall on the outer wall of the main lead screw (17) matches the threaded wall on the inner wall of the sliding half sleeve (3) and the guide half sleeve (21). An end cap (33) is provided at the top center of the main lead screw (17), and a matching cavity (23) matching the shape of the end cap (33) is provided at the bottom center of the connecting part (7).

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