A large load roller screw

Abstract

The application discloses a large-load roller screw, which comprises a base and symmetrical mounting plates, the middle parts of the symmetrical mounting plates are jointly connected with a screw rod through transmission, the outer wall of the screw rod is connected with a first nut and a second nut through transmission, the outer wall of the first nut and the second nut is jointly provided with a nut seat, the inner cavity of the nut seat is provided with an annular groove, and the inner cavity of the annular groove is provided with an adjusting mechanism for driving the second nut to move horizontally, when the adjusting mechanism rotates, the second nut intermittently moves away from or approaches the position of the first nut. Through the intermittent transmission of the incomplete gear and the adjusting gear ring, the pre-tightening force between the first nut and the second nut can be conveniently and accurately adjusted, the pre-tightening force can be accurately adjusted according to the different weights of goods, the load capacity of the ball screw is improved, the pre-tightening force is prevented from being too large to cause the ball to be excessively worn, and the service life of the ball screw is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of transmission device technology, specifically a high-load roller screw. Background Technology

[0002] A ball screw is a precision transmission component that converts rotary motion into linear motion or vice versa. It features high transmission efficiency, high positioning accuracy, and long service life, and is widely used in CNC machine tools, automation equipment, precision instruments, robots, and other fields. It consists of a screw, nut, balls, and a circulation device.

[0003] In existing threaded preload double-nut ball screws, adjusting the preload requires manually rotating the externally threaded nut to adjust the relative position of the two nuts, and then using a locking nut for fixation. This makes it difficult to quickly and accurately adjust the preload to a suitable level. Furthermore, after long-term use, vibration may cause the locking nut to loosen, thereby changing the preload of the ball screw and affecting the transmission process. Summary of the Invention

[0004] The purpose of this invention is to provide a high-load roller screw to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-load roller screw includes a base and symmetrical mounting plates. The screw is connected to the center of the symmetrical mounting plates. A first nut and a second nut are connected to the outer wall of the screw. The outer walls of the first nut and the second nut are provided with a nut seat. The inner cavity of the nut seat has an annular groove. The inner cavity of the annular groove is provided with an adjustment mechanism for driving the second nut to move horizontally. When the adjustment mechanism rotates, the second nut intermittently moves horizontally away from or towards the position of the first nut.

[0007] As a further embodiment of the present invention: the lower end of the symmetrical mounting plate is fixedly connected to the upper middle part of the base, a servo motor is drivenly connected to the middle part of one side of the upper end of the base, the output end of the servo motor is drivenly connected to the lead screw, and symmetrical guide rails are fixedly connected to the upper end of the base.

[0008] As a further embodiment of the present invention: a movable block is slidably connected to the outer wall of the guide rail, a symmetrical sliding groove is provided at the upper end of the movable block, a bracket is slidably connected to the middle of the upper end of the movable block, the lower outer wall of the bracket is slidably connected to the inner cavity of the sliding groove, a hydraulic rod is drivenly connected to the middle of the upper end of the movable block, and the output end of the hydraulic rod is fixedly connected to the bracket.

[0009] As a further embodiment of the present invention: a platform is fixedly connected to the upper end of the symmetrical brackets, a symmetrical driven block is fixedly connected to the middle of the lower end of the platform, a driving block is fixedly connected to the middle of the upper end of the nut seat, the plane of the top of the driving block is lower than the plane of the lower end of the platform, and the plane of the lower end of the driven block is higher than the plane of the upper end of the nut seat.

[0010] As a further aspect of the present invention: the adjusting mechanism includes an adjusting ring, the adjusting ring and the second nut are threadedly connected, a fixing plate is fixedly connected to the side of the first nut away from the second nut, the fixing plate is fixedly connected to the nut seat by bolts, and an adjusting toothed ring is fixedly connected to the middle of the outer wall of the adjusting ring.

[0011] As a further aspect of the present invention: an installation groove is provided in the middle of the upper end of the annular groove, and a drive motor is connected to the inner cavity of the installation groove near the first nut. An incomplete gear is fixedly connected to the output end of the drive motor, and the incomplete gear meshes with the adjusting gear ring.

[0012] As a further aspect of the present invention: a positioning mechanism is provided on both sides of the annular groove. The positioning mechanism includes a vertical groove, which is opened on the side of the nut seat cavity away from the first nut. The distance between the symmetrical vertical grooves is greater than the width of the annular groove. A groove is opened in the middle of the annular groove cavity on the side near the vertical groove. A locking block is horizontally slidably connected to the groove cavity. The end of the locking block is engaged with the adjusting toothed ring.

[0013] As a further embodiment of the present invention: a U-shaped plate is vertically slidably connected to the inner cavity of the vertical groove, a connecting plate is fixedly connected to the upper end of the U-shaped plate near the second nut, the height of the U-shaped plate is greater than the height of the inner cavity of the vertical groove, a U-shaped groove is provided on the top of the nut seat to slide with the U-shaped plate, a fixing block is fixedly connected to the upper part of the inner cavity of the U-shaped plate, and the upper end of the fixing block is elastically connected to the top of the inner cavity of the vertical groove by a spring.

[0014] As a further aspect of the present invention: a symmetrical driven rod is fixedly connected to the middle of the side of the locking block away from the adjusting toothed ring. The width of the locking block is the same as the width of the inner cavity of the U-shaped plate. A symmetrical limiting groove is provided on the inner cavity sidewall of the U-shaped plate. A guide groove is provided at the lower end of the limiting groove. A positioning groove is provided at the lower end of the guide groove. The outer wall of the driven rod away from the locking block is in sliding fit with the limiting groove, the guide groove and the positioning groove.

[0015] As a further aspect of the present invention: the horizontal distance between the two ends of the guide groove is greater than the length of the block extending through the groove into the inner cavity of the annular groove; the vertical height of the limiting groove is the same as the vertical height of the positioning groove; and the vertical height of the positioning groove is greater than the vertical height of the driven rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] By using a bracket and platform, the weight of the goods can be distributed to the moving block. This allows the ball screw to only overcome the increased frictional resistance as the weight of the goods on the platform increases, thus improving the maximum weight the ball screw can withstand and its load-bearing capacity. The intermittent transmission of the incomplete gear and adjusting gear ring allows for convenient and precise adjustment of the preload between the first and second nuts. This allows for accurate adjustment of the preload based on the different weights of the goods, improving the ball screw's load-bearing capacity while preventing excessive preload that could lead to excessive ball wear and significantly reduce the ball screw's lifespan. The cooperation of the driven rod and the limiting groove restricts the horizontal position of the locking block, ensuring that the locking block always engages and limits the adjusting gear ring. This prevents the locking block from wobbling horizontally due to vibrations during movement, which could alter the preload and thus the ball screw's load-bearing capacity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the stage in this invention.

[0020] Figure 3 For the present invention Figure 2 A schematic diagram of the structure of area A in the middle.

[0021] Figure 4 This is a schematic diagram of the nut seat in this invention.

[0022] Figure 5 This is a schematic diagram of the internal structure of the nut seat in this invention.

[0023] Figure 6 This is a schematic diagram of the adjusting ring in this invention.

[0024] Figure 7 This is a schematic diagram of the adjustment mechanism in this invention.

[0025] Figure 8 For the present invention Figure 7 A schematic diagram of the structure of area B in the middle.

[0026] Figure 9 For the present invention Figure 7 A schematic diagram of the structure of area C.

[0027] Figure 10 This is a schematic diagram of the positioning mechanism in this invention.

[0028] Figure 11 This is a schematic diagram of the slide groove in this invention.

[0029] In the diagram: 1. Base; 2. Servo motor; 3. Mounting plate; 4. Lead screw; 5. Nut seat; 6. Guide rail; 7. Moving block; 8. Bracket; 9. Platform; 10. Hydraulic rod; 11. Drive block; 12. Driven block; 13. Fixing plate; 14. First nut; 15. Second nut; 16. Annular groove; 17. Mounting groove; 18. Adjusting ring; 19. Adjusting gear ring; 20. Incomplete gear; 21. Drive motor; 22. U-shaped plate; 23. Connecting plate; 24. Guide groove; 25. Positioning groove; 26. Limiting groove; 27. Driven rod; 28. Locking block; 29. ​​Vertical groove; 30. Fixing block; 31. Slide groove. Detailed Implementation

[0030] Please see Figures 1-3 In this embodiment of the invention, a high-load roller screw includes a base 1 and symmetrical mounting plates 3. A screw 4 is connected to the center of the symmetrical mounting plates 3. A first nut 14 and a second nut 15 are connected to the outer wall of the screw 4. Both the first nut 14 and the second nut 15 have ball bearings and an internal circulation channel, a common technique in the prior art. A nut seat 5 is provided on the outer wall of both the first nut 14 and the second nut 15. An annular groove 16 is formed in the inner cavity of the nut seat 5. The inner cavity of the annular groove 16 is provided with an adjustment mechanism for driving the second nut 15 to move horizontally. The adjustment mechanism, when the adjustment mechanism rotates, causes the second nut 15 to intermittently move horizontally away from or closer to the position of the first nut 14. The ball screw, a cylinder with a helical raceway, is the driving component of the transmission. The nut has a helical raceway that matches the screw, and it fits on the screw, achieving linear motion as the screw rotates. The balls are located between the raceways of the screw and the nut, and are usually steel spheres. They reduce transmission resistance by replacing sliding friction with rolling friction. The internal circulation device guides the ball circulation through a reverser (such as a crescent shape or a circle) inside the nut. The structure is compact and the operation is smooth.

[0031] Please see Figure 1 , Figure 2 and Figure 11The lower end of the symmetrical mounting plate 3 is fixedly connected to the upper middle part of the base 1. A servo motor 2 is driven to the middle of one side of the upper end of the base 1. The output end of the servo motor 2 is connected to the lead screw 4 through a coupling (a key component in mechanical transmission that connects two shafts or a shaft and a rotating part, used to transmit torque, compensate for deviations, and reduce vibration; it is a commonly used technical means in the prior art). The servo motor 2 can drive the lead screw 4 to rotate, and then through the transmission cooperation of the first nut 14, the second nut 15, and the lead screw 4, it drives the nut seat 5 to move horizontally. The base 1 is fixedly connected to a symmetrical guide rail 6 at its upper end. A moving block 7 is slidably connected to the outer wall of the guide rail 6. A symmetrical sliding groove 31 is provided at the upper end of the moving block 7. A bracket 8 is slidably connected to the middle of the upper end of the moving block 7. The lower outer wall of the bracket 8 is slidably connected to the inner cavity of the sliding groove 31. A hydraulic rod 10 is driven to the middle of the upper end of the moving block 7. The output end of the hydraulic rod 10 is fixedly connected to the bracket 8. The bracket 8 can be driven to move vertically in the vertical direction through the hydraulic rod 10, so that the bracket 8 moves vertically in the inner cavity of the sliding groove 31.

[0032] Please see Figures 2-4 A platform 9 is fixedly connected to the upper end of the symmetrical support 8. A symmetrical driven block 12 is fixedly connected to the lower middle of the platform 9. A drive block 11 is fixedly connected to the upper middle of the nut seat 5. The width of the drive block 11 is equal to the spacing between the symmetrical driven blocks 12. When the lead screw 4 is driven by the servo motor 2 to rotate, it will drive the nut seat 5 and the drive block 11 to move horizontally synchronously. The drive block 11 will then contact the side wall of the driven block 12, thereby pushing the driven block 12 to move. This causes the platform 9, support 8, and moving block 7 to move horizontally synchronously. The plane where the top of the drive block 11 is located is lower than the plane where the lower end of the platform 9 is located. The plane where the lower end face of the moving block 12 is located is higher than the plane where the upper end face of the nut seat 5 is located. This ensures that when the platform 9 is carrying goods, the bottom of the bracket 8 is located at the bottom of the inner cavity of the slide groove 31, and the driven block 12 will not contact the top of the nut seat 5. This avoids the screw 4 and the nut seat 5 directly bearing the weight of the goods. By setting the bracket 8 and the platform 9, the weight of the goods can be distributed to the moving block 7. This allows the ball screw to only overcome the increased frictional resistance caused by the increased weight of the goods carried by the platform 9 when the moving block 7 moves horizontally. This increases the maximum weight that the ball screw can bear and improves the load capacity of the ball screw.

[0033] Please see Figures 5-7The adjusting mechanism includes an adjusting ring 18. The second nut 15 has an external thread at its end away from the first nut 14, and an internal thread in its inner cavity. The second nut 15 and the adjusting ring 18 are engaged via the external and internal threads. A fixing plate 13 is fixedly connected to the side of the first nut 14 away from the second nut 15, and the fixing plate 13 is fixedly connected to the nut seat 5 by bolts. An adjusting gear ring 19 is fixedly connected to the middle of the outer wall of the adjusting ring 18. An installation groove 17 is formed in the middle of the upper end of the annular groove 16. A drive motor 21 is connected to the inner cavity of the installation groove 17 near the first nut 14. An incomplete gear 20 is fixedly connected to the output end of the drive motor 21. The incomplete gear 20 meshes with the adjusting gear ring 19. When the drive motor 21 drives the incomplete gear 20 to rotate clockwise, the incomplete gear 20 will intermittently contact the adjusting gear ring 19, thereby driving the adjusting gear ring 19 to rotate intermittently counterclockwise, and thus driving the adjusting ring 18 to rotate counterclockwise. Under the transmission action of the threaded connection, the second nut 15 can be driven to intermittently move away from the position of the first nut 14. Similarly, when the incomplete gear 20 rotates counterclockwise, the second nut 15 can be driven to move closer to the position of the first nut 14. By driving the incomplete gear 20 to rotate through the drive motor 21, the second nut 15 can be driven to intermittently move closer to or away from the position of the first nut 14, thereby causing relative movement between the first nut 14 and the second nut 15. This applies a preload to the first nut 14 and the second nut 15 to eliminate the empty stroke that occurs when the ball screw reverses. Furthermore, the double nut configuration of the first nut 14 and the second nut 15 in the preloaded state ensures that the balls and raceways always maintain close contact, reducing elastic deformation under stress, improving overall transmission rigidity, and by setting the first nut 14 and the second nut 15 as a double nut, compared to a single nut, the two nuts can share the load transmitted by the screw, reducing the stress intensity of a single nut and extending its service life.

[0034] Please see Figure 7 By using the intermittent transmission of the incomplete gear 20 and the adjusting gear ring 19, the relative movement of the driving second nut 15 and the first nut 14 can be easily achieved. This allows for convenient and precise adjustment of the preload between the first nut 14 and the second nut 15, facilitating accurate adjustment of the preload according to the different weights of the goods. This improves the load capacity of the ball screw while preventing excessive preload from causing excessive wear of the balls and significantly reducing the service life of the ball screw. After adjusting the preload, the position of the second nut 15 needs to be fixed. Since the incomplete gear 20 and the adjusting gear ring 19 cannot maintain continuous engagement, if the incomplete gear 20 is not engaged with the adjusting gear ring 19 after the drive motor 21 self-locks and restricts the position of the incomplete gear 20, the limiting effect on the adjusting gear ring 19 cannot be achieved, and thus the adjusting ring 18 and the second nut 15 cannot be fixed.

[0035] Please see Figures 7-8 Both sides of the annular groove 16 are provided with positioning mechanisms for engaging and limiting the adjusting gear ring 19. The positioning mechanism includes a vertical groove 29, which is opened in the inner cavity of the nut seat 5 on the side away from the first nut 14. The distance between the symmetrical vertical grooves 29 is greater than the width of the annular groove 16. A groove is opened in the middle of the inner cavity of the annular groove 16 near the vertical groove 29. A locking block 28 is horizontally slidably connected in the inner cavity of the groove. The end of the locking block 28 engages with the adjusting gear ring 19, thereby limiting and fixing the adjusting gear ring 19, and further limiting and fixing the adjusting ring 18. The adjusting ring 18 and the second nut 15 are engaged through threaded transmission. Therefore, when the adjusting ring 18 is limited and fixed, the second nut 15 is also limited, so that the interval between the first nut 14 and the second nut 15 is fixed, ensuring that the preload after adjustment can remain stable, so that the ball screw can stably maintain the increased load capacity.

[0036] Please see Figures 9-10 A U-shaped plate 22 is vertically slidably connected to the inner cavity of the vertical groove 29. The height of the U-shaped plate 22 is greater than the height of the inner cavity of the vertical groove 29. The top of the nut seat 5 has a U-shaped groove that slides with the U-shaped plate 22. The U-shaped groove is connected to the inner cavity of the vertical groove 29. A fixing block 30 is fixedly connected to the upper part of the inner cavity of the U-shaped plate 22. The upper end of the fixing block 30 is elastically connected to the top of the inner cavity of the vertical groove 29 by a spring. That is, when the U-shaped plate 22 is not subjected to downward pressure, the spring will contract, thereby driving the U-shaped plate 22 to move vertically upward. A connecting plate 23 is fixedly connected to the side of the upper end of the U-shaped plate 22 near the drive block 11. The end of the connecting plate 23 away from the U-shaped plate 22 is... When the lower end of the bracket 8 is located at the bottom of the inner cavity of the slide groove 31, the distance between the lower end face of the driven block 12 and the nut seat 5 is the same as the vertical height of the connecting plate 23. When the hydraulic rod 10 drives the bracket 8, the platform 9 and the driven block 12 to move vertically upward, the driven block 12 moves away from the position of the nut seat 5, and the connecting plate 23 loses the compression of the driven block 12. Then, the U-shaped plate 22 will drive the connecting plate 23 to move upward synchronously under the action of the elastic force. Similarly, when the driven block 12 moves downward, it will squeeze the connecting plate 23 downward, thereby pushing the U-shaped plate 22 to move vertically downward in the inner cavity of the vertical groove 29. At this time, the spring is stretched.

[0037] Please see Figure 10A symmetrical driven rod 27 is fixedly connected to the middle of the side of the locking block 28 away from the adjusting gear ring 19. The width of the locking block 28 is the same as the width of the inner cavity of the U-shaped plate 22, so the outer wall of the side of the locking block 28 away from the adjusting gear ring 19 fits against the inner cavity side wall of the U-shaped plate 22. The length of the inner cavity of the U-shaped plate 22 is greater than the length of the locking block 28. A symmetrical limiting groove 26 is opened on the inner cavity side wall of the U-shaped plate 22. The outer wall of the driven rod 27 away from the locking block 28 slides in cooperation with the limiting groove 26. A guide groove 24 is opened at the lower end of the limiting groove 26. The horizontal distance between the two ends of the guide groove 24 is greater than the length of the locking block 28 that extends through the groove into the inner cavity of the annular groove 16. The lower end of 4 is provided with a positioning groove 25. When the driven rod 27 is located at the top of the inner cavity of the limiting groove 26, the locking block 28 is engaged with the adjusting toothed ring 19. When the U-shaped plate 22 moves upward, the driven rod 27 will gradually move closer to the guide groove 24. When the driven rod 27 enters the inner cavity of the guide groove 24, the locking block 28 will be driven to move away from the position of the adjusting toothed ring 19 under the sliding engagement of the guide groove 24 and the driven rod 27. When the driven rod 27 is located at the bottom of the inner cavity of the positioning groove 25, the end of the locking block 28 that is close to the adjusting toothed ring 19 moves into the inner cavity of the groove, thereby releasing the locking block 28 from limiting and fixing the adjusting toothed ring 19.

[0038] Please see Figures 7-10The teeth of the incomplete gear 20 and the teeth of the adjusting gear ring 19 are of the same size. Therefore, during the rotation of the adjusting gear ring 19 driven by the incomplete gear 20, the center position of the locking block 28 is always aligned with the position between two adjacent teeth on the outer wall of the adjusting gear ring 19. This ensures that after adjusting the position of the second nut 15, the locking block 28 can accurately limit and fix the adjusting gear ring 19. That is, after adjustment, the driven block 12 moves downward, which in turn drives the U-shaped plate 22 downward through the connecting plate 23. At this time, the driven rod 27 moves from the bottom of the inner cavity of the positioning groove 25 to the top of the inner cavity of the limiting groove 26, thereby driving the locking block 28 to approach and contact the adjusting gear ring 19, completing the limiting and fixing of the adjusting gear ring 19. The vertical height of the limiting groove 26 is the same as the vertical height of the positioning groove 25, while the vertical height of the positioning groove 25 is greater than the vertical height of the driven rod 27. Therefore, when the screw 4 connects to the first screw... During the horizontal reciprocating motion of the nut seat 5 and the platform 9 driven by the transmission cooperation of the nut 14 and the second nut 15, the height of the limit bracket 8 is limited by the hydraulic rod 10, ensuring that its lower end is always at the bottom of the inner cavity of the slide groove 31. This ensures that the driven block 12 can continuously press the connecting plate 23, so that the lower end face of the connecting plate 23 is always in contact with the upper end face of the nut seat 5. This also ensures that the driven rod 27 is always at the top of the inner cavity of the limiting groove 26. Thus, during the transportation of goods, the driven rod 27 and the limiting groove 26 cooperate to limit the horizontal position of the locking block 28, so that the locking block 28 always engages and limits the adjusting toothed ring 19. This prevents the locking block 28 from shaking horizontally due to vibrations during the movement, which would cause changes in the preload and thus change the load capacity of the ball screw. This could result in either insufficient preload to carry the load or excessive preload causing severe wear of the balls.

[0039] The support 8, platform 9, and driven block 12 are driven vertically by the hydraulic rod 10. When the weight of the goods to be transported increases, the preload between the first nut 14 and the second nut 15 is usually adjusted when the goods are not loaded. At this time, it is difficult to determine whether the preload can be adjusted to the correct position in one go. With the cooperation of the hydraulic rod 10 and the platform 9, the support 8, platform 9, and goods can be lifted synchronously by the hydraulic rod 10 after the goods are loaded. If the preload adjustment is insufficient, the incomplete gear 20 can be driven by the drive motor 21 to rotate again after the platform 9 and the goods are lifted. The incomplete gear 20 drives the adjusting gear ring 19 to rotate intermittently, thereby accurately adjusting the preload between the first nut 14 and the second nut 15. This ensures that while improving the load capacity of the ball screw, excessive wear of the balls is avoided. This ensures that the ball screw has a long service life while having a large load capacity. During long-term use, there is no need to worry about the preload changing due to vibration, which would affect the load capacity and service life of the ball screw.

Claims

1. A high-load roller screw, comprising a base and symmetrical mounting plates, characterized in that, The symmetrical mounting plates are connected to a lead screw in the middle. The outer wall of the lead screw is connected to a first nut and a second nut. The outer walls of the first nut and the second nut are provided with a nut seat. The inner cavity of the nut seat is provided with an annular groove. The inner cavity of the annular groove is provided with an adjustment mechanism for driving the second nut to move horizontally. When the adjustment mechanism rotates, the second nut intermittently moves horizontally away from or towards the position of the first nut. The adjusting mechanism includes an adjusting ring, which is threadedly connected to a second nut. A fixing plate is fixedly connected to the side of the first nut away from the second nut. The fixing plate is fixedly connected to the nut seat by bolts. An adjusting toothed ring is fixedly connected to the middle of the outer wall of the adjusting ring. An installation groove is provided in the middle of the upper end of the annular groove. A drive motor is connected to the inner cavity of the installation groove near the first nut. An incomplete gear is fixedly connected to the output end of the drive motor. The incomplete gear meshes with the adjusting gear ring. Positioning mechanisms are provided on both sides of the annular groove. The positioning mechanism includes a vertical groove, which is opened on the side of the nut seat cavity away from the first nut. The distance between the symmetrical vertical grooves is greater than the width of the annular groove. A groove is opened in the middle of the annular groove cavity on the side close to the vertical groove. A locking block is horizontally slidably connected to the groove cavity. The end of the locking block is engaged with the adjusting tooth ring. A U-shaped plate is slidably connected to the inner cavity of the vertical groove. A connecting plate is fixedly connected to the upper end of the U-shaped plate near the second nut. The height of the U-shaped plate is greater than the height of the inner cavity of the vertical groove. A U-shaped groove is opened at the top of the nut seat to slide with the U-shaped plate. A fixing block is fixedly connected to the upper part of the inner cavity of the U-shaped plate. The upper end of the fixing block is elastically connected to the top of the inner cavity of the vertical groove by a spring.

2. The high-load roller screw according to claim 1, characterized in that, The lower end of the symmetrical mounting plate is fixedly connected to the upper middle part of the base. A servo motor is driven to the middle part of one side of the upper end of the base. The output end of the servo motor is connected to the lead screw drive. Symmetrical guide rails are fixedly connected to the upper end of the base.

3. A high-load roller screw according to claim 2, characterized in that, A movable block is slidably connected to the outer wall of the guide rail. A symmetrical sliding groove is provided at the upper end of the movable block. A bracket is slidably connected to the middle of the upper end of the movable block. The lower outer wall of the bracket is slidably connected to the inner cavity of the sliding groove. A hydraulic rod is drivenly connected to the middle of the upper end of the movable block. The output end of the hydraulic rod is fixedly connected to the bracket.

4. A high-load roller screw according to claim 3, characterized in that, The symmetrical brackets are fixedly connected to a platform at their upper ends. The lower middle part of the platform is fixedly connected to a symmetrical driven block. The upper middle part of the nut seat is fixedly connected to a driving block. The top plane of the driving block is lower than the lower end plane of the platform, and the lower end plane of the driven block is higher than the upper end plane of the nut seat.

5. A high-load roller screw according to claim 1, characterized in that, The locking block has symmetrical driven rods fixedly connected to the middle of the side away from the adjusting toothed ring. The width of the locking block is the same as the width of the inner cavity of the U-shaped plate. The inner cavity sidewall of the U-shaped plate has symmetrical limiting grooves. The lower end of the limiting groove has a guide groove. The lower end of the guide groove has a positioning groove. The outer wall of the driven rod away from the locking block is in sliding fit with the limiting groove, the guide groove and the positioning groove.

6. A high-load roller screw according to claim 5, characterized in that, The horizontal distance between the two ends of the guide groove is greater than the length of the block extending through the groove into the inner cavity of the annular groove. The vertical height of the limiting groove is the same as the vertical height of the positioning groove, and the vertical height of the positioning groove is greater than the vertical height of the driven rod.

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