Planetary roller screw structure

Abstract

The invention provides a planetary roller screw structure, and belongs to the technical field of servo transmission mechanisms, the planetary roller screw structure comprises a workbench, the top of the workbench is fixedly connected with a square box, and a piston plate extrudes lubricating oil in an oil storage tank in the moving process, so that the lubricating oil enters a threaded sleeve box through a first one-way valve pipe and a rectangular piece; the inner wall of the threaded sleeve box is lubricated, friction among the roller lead screw, the lead screw sleeve and the threaded sleeve box is effectively reduced, noise of equipment in the running process is reduced, abrasion is reduced, and the good running state of the equipment is kept. When the piston plate extrudes the lubricating oil in the oil storage tank, negative pressure is generated in another area in the oil storage tank, the negative pressure absorbs the lubricating oil at the bottom of the inner wall of the threaded sleeve box through a second one-way valve pipe and a rectangular piece, and recycling of the lubricating oil is achieved. By means of the design, waste of lubricating oil can be reduced, and economical efficiency of the whole system is improved.

Description

Technical Field

[0001] This invention belongs to the field of servo transmission mechanism technology, specifically relating to a planetary roller screw structure. Background Technology

[0002] A planetary roller screw structure is an advanced mechanical transmission system that combines a planetary roller mechanism to improve transmission efficiency and load-bearing capacity. This structure offers a highly efficient and precise mechanical transmission solution suitable for a variety of high-end applications and demonstrates broad development prospects.

[0003] A search of patent document CN121322596A reveals a multi-stage planetary roller screw pair structure, belonging to the field of servo transmission mechanism technology. It includes a first-stage screw, first-stage rollers, a first-stage nut, an angular contact bearing II, a first-stage actuator cylinder, a second-stage screw, second-stage rollers, a second-stage nut, a housing, and an adapter shaft; thus forming a nested structure of first-stage and second-stage planetary roller screw pairs. This structure allows for a large working stroke within a small retraction dimension, and a large load-bearing capacity within a small radial dimension. Simultaneously, by adjusting the thread lead of the first and second-stage screws, the linear motion speed ratio of different stages of the screw pair can be controlled, achieving precise control of the effective load movement speed at the end. Furthermore, each nut is designed with a guide structure within its stroke range, ensuring high stability of the output load at the end of the structure.

[0004] While the aforementioned patents can achieve stable output loads at the structural end, they cannot effectively address the noise generated during the interaction between components. In other words, when planetary roller screw mechanisms are used in existing technologies, the relative motion between components and the frictional characteristics at contact points lead to noise generation. Noise generated by the interaction and transmission between components not only affects the normal operation of the equipment but can also bring a series of negative consequences, such as accelerated equipment wear, increased failure rates, and a deteriorating working environment. Therefore, these factors need to be comprehensively considered during the design and implementation process to reduce noise and improve the overall system performance and reliability. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a planetary roller screw structure that effectively solves the problem of noise generation caused by the relative motion between components and the frictional characteristics of contact points when using planetary roller screw mechanisms in existing technologies. The noise generated by the transmission between components not only affects the normal operation of the equipment but may also bring a series of negative consequences, such as accelerated equipment wear, increased failure rates, and deterioration of the working environment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a planetary roller screw structure, including a worktable, a square box fixedly connected to the top of the worktable, a fixed plate fixedly connected to one side of the top of the worktable, and a planetary roller screw mechanism, the planetary roller screw mechanism including motors fixedly connected to both ends of one side of the inner wall of the square box, the output end of the motors being fixedly connected to a roller screw, one end of the outer wall of the roller screw being rotatably connected to the inner wall of the fixed plate, limit grooves being provided on both sides of the worktable, and a stabilizing component being provided on the outer wall of the roller screw for precise and stable power transmission of materials.

[0007] Preferably, the stabilizing component includes six screw sleeves threaded around the outer wall of the roller screw, a crossbar fixedly connected to the inner wall of the screw sleeve, gears fixedly connected to the outer walls of both ends of the crossbar, two rotating plates rotatably connected to the outer walls of the two ends of the crossbar near the gears, and a gear ring fixedly connected to one side of the rotating plate.

[0008] Preferably, the inner wall of the gear ring is meshed with one side of the outer wall of the gear, the outer wall of the rotating plate is rotatably connected to a threaded sleeve, the middle end of the inner wall of the threaded sleeve is threaded to the outer wall of the lead screw sleeve, a positioning plate is fixedly connected to one side of the outer wall of the threaded sleeve, and one end of the outer wall of the positioning plate is slidably connected to the inner wall of the limiting groove.

[0009] Preferably, the end of the threaded sleeve is provided with a lubrication assembly, the lubrication assembly includes a strip box fixedly connected to the top and bottom of the threaded sleeve respectively, an oil reservoir is fixedly connected between the two threaded sleeves, and four first one-way valve pipes are respectively connected to the top of the oil reservoir.

[0010] Preferably, the bottom of the oil tank is connected to four second one-way valve pipes, and one end of the first one-way valve pipe and the second one-way valve pipe are connected to a rectangular member. The outer wall of the rectangular member is fixedly connected to the inner wall of the threaded sleeve, and a piston plate is slidably connected to the middle of the inner wall of the oil tank.

[0011] Preferably, round rods are fixedly connected to both sides of the piston plate, and a square plate is fixedly connected to one end of each round rod. The square plate is disposed outside the oil reservoir. Tension springs are fixedly connected to both sides of the piston plate, and one end of each tension spring is fixedly connected to one side of the inner wall of the oil reservoir.

[0012] Preferably, the end of the crossbar is provided with an auxiliary component, the auxiliary component including a ring plate fixedly connected to both ends of the crossbar, a fixing rod fixedly connected to both ends of one side of the ring plate, a sleeve rod fixedly connected to the outer wall of one end of the fixing rod, and a sponge strip fixedly connected to one side of the sleeve rod.

[0013] Preferably, one side of the sponge strip is slidably connected to the inner wall of the threaded sleeve, and a bent plate is fixedly connected to one side of the outer wall of the threaded sleeve. Both ends of one side of the bent plate are slidably connected to a sliding rod, and a sealing plate is fixedly connected to the outer wall of one end of the sliding rod.

[0014] Preferably, compression springs are fixedly connected to all four sides of one side of the sealing plate, one end of the compression spring is fixedly connected to one side of the inner wall of the curved plate, square holes are opened at both ends of one side of the outer wall of the threaded sleeve, one end of the sliding rod is slidably connected to the inner wall of the square hole, and a strip hole is opened on the outer wall side of the threaded sleeve near the square hole.

[0015] This invention also proposes a method of using a planetary roller screw structure, which includes the following steps: S1, Start the motor. The motor drives the roller screw to rotate. The rotation of the roller screw causes the screw sleeve to rotate circumferentially around the inner wall of the threaded sleeve box. The screw sleeve drives the crossbar and gear to rotate circumferentially on the inner wall of the gear ring. The crossbar also drives the rotating plate to rotate circumferentially on the inner wall of the threaded sleeve box. During this process, the threaded sleeve box is limited by the threads of the roller screw and the screw sleeve, causing the threaded sleeve box to drive the positioning plate to move laterally on the inner wall of the limiting groove. Through the double threaded sleeve box, it can slide along the outer wall of the roller screw at the same time, which is suitable for operation under large loads. S2, when the threaded sleeve moves, the threaded sleeve drives the oil reservoir and the strip box to move. The oil reservoir drives the piston plate, the round rod and the square plate to move. When the square plate on the left moves towards the square box, the square plate will contact the side wall of the square box and be squeezed by the square box, causing the square plate to drive the round rod and the piston plate to slide to the right on the inner wall of the oil reservoir. During the movement of the piston plate, the lubricating oil on the right side of the oil reservoir is squeezed, so that the lubricating oil in the right area enters the interior of the threaded sleeve through the first one-way valve pipe and the rectangular piece. When the square plate on the right moves towards the fixed plate, it is squeezed by the fixed plate and performs the same movement as above, lubricating the inner wall of the threaded sleeve. Under the control of the position sensor, when one end of the oil reservoir is about to approach the square box or the fixed plate, the motor will be controlled to stop running. S3, when the piston plate squeezes the lubricating oil inside the oil reservoir, a negative pressure is generated in another area inside the oil reservoir. The negative pressure absorbs the lubricating oil at the bottom of the inner wall of the threaded sleeve through the second one-way valve tube and the rectangular piece. S4, when multiple crossbars drive multiple lead screw sleeves to rotate around the thread of the roller lead screw, the crossbars drive the ring plate to rotate, and the ring plate drives the fixed rod, sleeve rod and sponge strip to rotate. During the rotation of the sponge strip, it can absorb the lubricating oil that remains inside the threaded sleeve. At the same time, when the sponge strip absorbs the lubricating oil and rotates, it can make the lubricating oil fully coated on the inner wall of the threaded sleeve. S5, when the crossbar drives the lead screw sleeve to rotate around the outer wall of the roller lead screw, the outer wall of the lead screw sleeve will contact the side wall of one end of the sliding rod that enters the threaded sleeve box and squeeze the sliding rod, causing the sliding rod to drive the sealing plate to move in the opposite direction. The sealing plate no longer blocks the strip hole, thereby continuously allowing the outside air to interact with the air inside the threaded sleeve box and cooling the airflow inside the threaded sleeve box.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The planetary roller screw structure provided by the present invention can start a motor, which drives the roller screw to rotate. The rotation of the roller screw causes the screw sleeve to rotate circumferentially around the inner wall of the threaded sleeve box. The screw sleeve drives the crossbar and gear to rotate circumferentially on the inner wall of the gear ring, and the crossbar drives the rotating plate to rotate circumferentially on the inner wall of the threaded sleeve box. During this process, the threaded sleeve box is limited by the threads of the roller screw and the screw sleeve, causing the threaded sleeve box to drive the positioning plate to move laterally on the inner wall of the limiting groove. Through the double threaded sleeve box, it can slide along the outer wall of the roller screw at the same time, which improves the load-bearing capacity and transmission efficiency of the equipment and is suitable for operation under large loads. Moreover, the threaded fit between the roller screw, the screw sleeve and the threaded sleeve box can provide smoother movement during operation, reduce vibration and noise, and make the whole system work more quietly.

[0017] (2) Through the coordinated operation of the stabilizing component and the lubrication component, this invention can both lubricate the parts and continuously utilize the lubricating oil. Specifically, when the threaded sleeve moves, the threaded sleeve drives the oil reservoir and the strip box to move. The oil reservoir drives the piston plate, the round rod, and the square plate to move. When the square plate on the left moves towards the square box, the square plate will contact the side wall of the square box and be squeezed by the square box. This causes the square plate to drive the round rod and the piston plate to slide to the right on the inner wall of the oil reservoir. During the movement of the piston plate, the lubricating oil on the right side of the oil reservoir is squeezed. The lubricating oil in the right-side region enters the threaded sleeve through the first one-way valve and rectangular component. As the right-side square plate moves towards the fixed plate, it is squeezed by the fixed plate, performing the same movement as described above, lubricating the inner wall of the threaded sleeve. Controlled by a position sensor, when one end of the oil reservoir is about to approach the square box or fixed plate, the motor stops operating, effectively reducing friction between the roller screw, screw sleeve, and threaded sleeve, thereby reducing noise and wear during equipment operation and maintaining good operating condition. When the piston plate squeezes the lubricating oil inside the oil reservoir, a negative pressure is generated in another area inside the oil reservoir. This negative pressure absorbs the lubricating oil at the bottom of the inner wall of the threaded sleeve through the second one-way valve and rectangular component, realizing the recycling of lubricating oil. This design reduces lubricating oil waste and improves the overall system economy.

[0018] (3) The present invention can reduce the wear of parts and prevent overheating when the parts are in contact by the stabilizing components and auxiliary components through the coordinated cooperation of the components. Specifically, when multiple crossbars drive multiple screw sleeves to rotate around the thread of the roller screw, the crossbars drive the ring plate to rotate, and the ring plate drives the fixed rod, sleeve rod and sponge strip to rotate. During the rotation of the sponge strip, it can absorb the lubricating oil inside the threaded sleeve. At the same time, when the sponge strip absorbs the lubricating oil and rotates, it can make the lubricating oil fully coated on the inner wall of the threaded sleeve, ensuring that the lubricating oil can be evenly distributed, thereby improving the lubrication effect, improving the operating efficiency and reducing wear. Under the elastic compression of the compression spring, the compression spring drives the sealing plate and sliding rod to slide into the threaded sleeve, so that the sealing plate seals the strip hole on the outer wall of the threaded sleeve, preventing external impurities from entering the threaded sleeve. At the same time, when the crossbar drives the lead screw sleeve to rotate around the outer wall of the roller lead screw, the outer wall of the lead screw sleeve will contact the side wall of one end of the sliding rod that has entered the threaded sleeve, and squeeze the sliding rod, so that the sliding rod drives the sealing plate to move in the opposite direction. The sealing plate no longer seals the strip hole, thus allowing the outside air to interact with the air inside the threaded sleeve without interruption. This prevents overheating between the roller lead screw, lead screw sleeve and threaded sleeve, reduces wear and damage to components caused by high temperature, extends the service life of the roller lead screw, lead screw sleeve and other components, and improves the overall stability of the equipment operation. Attached Figure Description

[0019] Figure 1 This is a top view of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the square box structure of the present invention; Figure 3 This is a schematic cross-sectional view of the workbench structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of A in the middle; Figure 5 This is a top view of the cross-sectional structure of the fixing plate of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of B in the middle; Figure 7 This is a schematic cross-sectional view of the oil storage tank of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of C; Figure 9 This is a schematic diagram of the side structure of the positioning plate of the present invention; Figure 10 This is a schematic diagram of the exploded structure of the threaded sleeve of the present invention; Figure 11This is a top view of the gear structure of the present invention.

[0020] In the diagram: 101. Worktable; 102. Square box; 103. Fixed plate; 104. Planetary roller screw mechanism; 111. Motor; 112. Roller screw; 113. Limit groove; 114. Stabilizing component; 115. Lubrication component; 116. Auxiliary component; 121. Screw sleeve; 122. Gear; 123. Gear ring; 124. Rotating plate; 125. Crossbar; 126. Threaded sleeve; 127. Positioning plate; 131. 132. Bar-shaped box; 133. Oil reservoir; 134. First one-way valve pipe; 135. Second one-way valve pipe; 136. Rectangular piece; 137. Piston plate; 138. Round rod; 139. Square plate; 140. Tension spring; 141. Strip hole; 142. Circular ring plate; 143. Fixing rod; 144. Sleeve rod; 145. Bent plate; 146. Sliding rod; 147. Sealing plate; 148. Compression spring; 149. Square hole. Detailed Implementation

[0021] The technical solutions of 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.

[0022] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", and "outer" indicate orientation or positional relationships only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0023] It should be understood that, in the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms “installation,” “connection,” and “linking” should be interpreted broadly.

[0024] Example: like Figures 1 to 11 As shown, the present invention provides a planetary roller screw structure, including a worktable 101, a square box 102 fixedly connected to the top of the worktable 101, and a fixing plate 103 fixedly connected to one side of the top of the worktable 101, and further including: The planetary roller screw mechanism 104 includes a motor 111 fixedly connected to both ends of one side of the inner wall of the square box 102. A roller screw 112 is fixedly connected to the output end of the motor 111. One end of the roller screw 112 is rotatably connected to the inner wall of the fixed plate 103. Limit grooves 113 are provided on both sides of the worktable 101. A stabilizing component 114 is provided on the outer wall of the roller screw 112 for precise and stable power transmission to the material. When the motor 111 is started, it drives the roller screw 112 to rotate. The rotation of the roller screw 112 causes the screw sleeve 121 to surround the threaded sleeve 12. The inner wall of 6 rotates in a circular motion. The lead screw sleeve 121 drives the crossbar 125 and gear 122 to rotate in a circular motion on the inner wall of the gear ring 123. The crossbar 125 drives the rotating plate 124 to rotate in a circular motion on the inner wall of the threaded sleeve 126. During this process, the threaded sleeve 126 is limited by the threads of the roller screw 112 and the lead screw sleeve 121, which causes the threaded sleeve 126 to drive the positioning plate 127 to move laterally on the inner wall of the limiting groove 113. Through the double threaded sleeve 126, it can slide along the outer wall of the roller screw 112 at the same time, which improves the load-bearing capacity and transmission efficiency of the equipment and is suitable for operation under large loads.

[0025] like Figures 1-4 , Figures 9-11 As shown, the stabilizing assembly 114 includes six screw sleeves 121 threaded around the outer wall of the roller screw 112. A crossbar 125 is fixedly connected to the inner wall of the screw sleeve 121. Gears 122 are fixedly connected to the outer walls of both ends of the crossbar 125. Two rotating plates 124 are rotatably connected to the outer walls of the two ends of the crossbar 125 near the gears 122. A gear ring 123 is fixedly connected to one side of the rotating plate 124.

[0026] The inner wall of the gear ring 123 is meshed with one side of the outer wall of the gear 122. The outer wall of the rotating plate 124 is rotatably connected to the threaded sleeve 126. The middle end of the inner wall of the threaded sleeve 126 is threaded to the outer wall of the lead screw sleeve 121. A positioning plate 127 is fixedly connected to one side of the outer wall of the threaded sleeve 126. One end of the outer wall of the positioning plate 127 is slidably connected to the inner wall of the limiting groove 113.

[0027] like Figures 2-5 , Figure 7 and Figure 9 As shown, a lubrication assembly 115 is provided at the end of the threaded sleeve 126. The lubrication assembly 115 includes a strip box 131 that is fixedly connected to the top and bottom of the threaded sleeve 126 respectively. An oil reservoir 132 is fixedly connected between the two threaded sleeves 126. Four first one-way valve pipes 133 are respectively connected to the top of the oil reservoir 132.

[0028] Four second one-way valve pipes 134 are connected to the bottom of the oil reservoir 132. One end of the first one-way valve pipe 133 and the second one-way valve pipe 134 are connected to a rectangular member 135. The outer wall of the rectangular member 135 is fixedly connected to the inner wall of the threaded sleeve 126. A piston plate 136 is slidably connected to the middle of the inner wall of the oil reservoir 132. When the piston plate 136 squeezes the lubricating oil inside the oil reservoir 132, a negative pressure is generated in another area inside the oil reservoir 132. The negative pressure absorbs the lubricating oil at the bottom of the inner wall of the threaded sleeve 126 through the second one-way valve pipes 134 and the rectangular member 135, thereby realizing the recycling of lubricating oil.

[0029] Both sides of the piston plate 136 are fixedly connected to round rods 137, and one end of the round rods 137 is fixedly connected to a square plate 138. When the threaded sleeve 126 moves, the threaded sleeve 126 drives the oil reservoir 132 and the strip box 131 to move. The oil reservoir 132 drives the piston plate 136, round rods 137 and square plate 138 to move. When the square plate 138 on the left moves towards the square box 102, the square plate 138 will contact the side wall of the square box 102 and be squeezed by the square box 102, causing the square plate 138 to drive the round rods 137 and piston plate 136 to slide to the right on the inner wall of the oil reservoir 132. During the movement of the piston plate 136, it squeezes the lubricating oil on the right side of the oil reservoir 132, causing the lubricating oil in the right area to pass through the first one-way valve pipe 133 and... The rectangular piece 135 enters the interior of the threaded sleeve 126. When the square plate 138 on the right moves toward the fixed plate 103, it is squeezed by the fixed plate 103 and performs the same movement as above, lubricating the inner wall of the threaded sleeve 126. Under the control of the position sensor, when one end of the oil tank 132 is about to approach the square box 102 or the fixed plate 103, the motor 111 will be controlled to stop running, effectively reducing the friction between the roller screw 112, the screw sleeve 121 and the threaded sleeve 126, thereby reducing the noise of the equipment during operation. The square plate 138 is set outside the oil tank 132. Tension springs 139 are fixedly connected to both sides of the piston plate 136, and one end of the tension spring 139 is fixedly connected to one side of the inner wall of the oil tank 132.

[0030] like Figures 2-11As shown, an auxiliary component 116 is provided at the end of the crossbar 125. The auxiliary component 116 includes a circular plate 141 fixedly connected to both ends of the crossbar 125. A fixed rod 142 is fixedly connected to both ends of one side of the circular plate 141. A sleeve rod 143 is fixedly connected to the outer wall of one end of the fixed rod 142. A sponge strip 144 is fixedly connected to one side of the sleeve rod 143. When multiple crossbars 125 drive multiple lead screw sleeves 121 to rotate around the thread of the roller lead screw 112, the crossbar 125 drives the circular plate 141 to rotate. The circular plate 141 drives the fixed rod 142, the sleeve rod 143 and the sponge strip 144 to rotate. During the rotation of the sponge strip 144, it can absorb the lubricating oil that remains inside the threaded sleeve 126. At the same time, when the sponge strip 144 absorbs the lubricating oil and rotates, it can make the lubricating oil fully coated on the inner wall of the threaded sleeve 126, ensuring that the lubricating oil can be evenly distributed.

[0031] One side of the sponge strip 144 is slidably connected to the inner wall of the threaded sleeve 126. A bent plate 145 is fixedly connected to one side of the outer wall of the threaded sleeve 126. A sliding rod 146 is slidably connected through both ends of one side of the bent plate 145. A sealing plate 147 is fixedly connected to the outer wall of one end of the sliding rod 146.

[0032] A compression spring 148 is fixedly connected to all four sides of one side of the sealing plate 147. Under the elastic compression of the compression spring 148, the compression spring 148 drives the sealing plate 147 and the sliding rod 146 to slide into the threaded sleeve 126, so that the sealing plate 147 blocks the strip hole 140 on the outer wall of the threaded sleeve 126, preventing external impurities from entering the interior of the threaded sleeve 126. One end of the compression spring 148 is fixedly connected to one side of the inner wall of the bent plate 145. Square holes 149 are opened at both ends of one side of the outer wall of the threaded sleeve 126. One end of the outer wall of the sliding rod 146 is slidably connected to the inner wall of the square hole 149. The threaded sleeve 126 has a strip hole 140 on the outer wall side near the square hole 149.

[0033] This invention also proposes a method of using a planetary roller screw structure, which includes the following steps: S1, start motor 111. Motor 111 drives roller screw 112 to rotate. The rotation of roller screw 112 causes screw sleeve 121 to rotate circumferentially around the inner wall of threaded sleeve 126. Screw sleeve 121 drives cross bar 125 and gear 122 to rotate circumferentially on the inner wall of gear ring 123. Cross bar 125 drives rotating plate 124 to rotate circumferentially on the inner wall of threaded sleeve 126. During this process, threaded sleeve 126 is limited by the threads of roller screw 112 and screw sleeve 121, causing threaded sleeve 126 to drive positioning plate 127 to move laterally on the inner wall of limiting groove 113. Through the double threaded sleeve 126, it can slide along the outer wall of roller screw 112 at the same time, which is suitable for operation under large load. S2, when the threaded sleeve 126 moves, it drives the oil reservoir 132 and the strip box 131 to move. The oil reservoir 132 drives the piston plate 136, the round rod 137, and the square plate 138 to move. When the square plate 138 on the left moves towards the square box 102, it will contact the side wall of the square box 102 and be squeezed by it. This causes the square plate 138 to drive the round rod 137 and the piston plate 136 to slide to the right on the inner wall of the oil reservoir 132. During the movement of the piston plate 136, it exerts pressure on the oil reservoir... The lubricating oil on the right side inside the oil tank 132 is squeezed, so that the lubricating oil in the right area enters the threaded sleeve 126 through the first one-way valve pipe 133 and the rectangular piece 135 on the right side. When the square plate 138 on the right side moves towards the fixed plate 103, it is squeezed by the fixed plate 103 and performs the same movement as above, lubricating the inner wall of the threaded sleeve 126. Under the control of the position sensor, when the oil tank 132 is about to approach the square box 102 or the fixed plate 103, the motor 111 will be controlled to stop running. S3, when the piston plate 136 squeezes the lubricating oil inside the oil reservoir 132, a negative pressure is generated in another area inside the oil reservoir 132. The negative pressure absorbs the lubricating oil at the bottom of the inner wall of the threaded sleeve 126 through the second one-way valve pipe 134 and the rectangular piece 135. S4, when multiple crossbars 125 drive multiple lead screw sleeves 121 to rotate circumferentially around the thread of the roller lead screw 112, the crossbars 125 drive the annular plate 141 to rotate circumferentially, and the annular plate 141 drives the fixed rod 142, the sleeve rod 143 and the sponge strip 144 to rotate circumferentially. During the circumferential motion of the sponge strip 144, it can absorb the lubricating oil remaining inside the threaded sleeve 126. At the same time, when the sponge strip 144 absorbs the lubricating oil and rotates, it can make the lubricating oil fully coated on the inner wall of the threaded sleeve 126. S5, when the crossbar 125 drives the lead screw sleeve 121 to rotate around the outer wall of the roller lead screw 112, the outer wall of the lead screw sleeve 121 will contact the side wall of one end of the sliding rod 146 that has entered the threaded sleeve 126, and squeeze the sliding rod 146, causing the sliding rod 146 to drive the sealing plate 147 to move in the opposite direction. The sealing plate 147 no longer blocks the strip hole 140, thereby continuously allowing the outside air to interact with the air inside the threaded sleeve 126, cooling the airflow inside the threaded sleeve 126. To prevent lubricating oil from rushing into the threaded sleeve 126 and filling the threaded sleeve 126, the following measures are taken. Inside 26, as mentioned above, when the lubricating oil rushes into the threaded sleeve 126, a negative pressure is generated in another area of ​​the oil reservoir 132. The negative pressure can absorb the lubricating oil at the bottom of the inner wall of the threaded sleeve 126 through the second one-way valve pipe 134 and the rectangular piece 135. Therefore, there will be no situation where the lubricating oil fills the inside of the threaded sleeve 126. At most, there will be residual lubricating oil at the bottom of the inner wall of the threaded sleeve 126. Moreover, the strip hole 140 in the threaded sleeve 126 is set in the middle of the side wall of the threaded sleeve 126, so the lubricating oil at the bottom of the inner wall of the threaded sleeve 126 will not leak out from the inside of the strip hole 140.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] 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. A planetary roller screw structure, comprising a worktable (101), wherein a square box (102) is fixedly connected to the top of the worktable (101), and a fixing plate (103) is fixedly connected to one side of the top of the worktable (101), characterized in that: Also includes: The planetary roller screw mechanism (104) includes a motor (111) fixedly connected to both ends of the inner wall of the square box (102). The output end of the motor (111) is fixedly connected to a roller screw (112). One end of the roller screw (112) is rotatably connected to the inner wall of the fixed plate (103). Limiting grooves (113) are opened on both sides of the worktable (101). The outer wall of the roller screw (112) is provided with a stabilizing component (114) for precise and stable power transmission of materials.

2. The planetary roller screw structure according to claim 1, characterized in that: The stabilizing component (114) includes six screw sleeves (121) threaded around the outer wall of the roller screw (112). A crossbar (125) is fixedly connected to the inner wall of the screw sleeve (121). Gears (122) are fixedly connected to the outer walls of both ends of the crossbar (125). Two rotating plates (124) are rotatably connected to the outer walls of the two ends of the crossbar (125) near the gears (122). A gear ring (123) is fixedly connected to one side of the rotating plate (124).

3. The planetary roller screw structure according to claim 2, characterized in that: The inner wall of the gear ring (123) is meshed with one side of the outer wall of the gear (122). The outer wall of the rotating plate (124) is rotatably connected to a threaded sleeve (126). The middle end of the inner wall of the threaded sleeve (126) is threaded to the outer wall of the lead screw sleeve (121). A positioning plate (127) is fixedly connected to one side of the outer wall of the threaded sleeve (126). One end of the outer wall of the positioning plate (127) is slidably connected to the inner wall of the limiting groove (113).

4. The planetary roller screw structure according to claim 3, characterized in that: The end of the threaded sleeve (126) is provided with a lubrication assembly (115). The lubrication assembly (115) includes a strip box (131) fixedly connected to the top and bottom of the threaded sleeve (126) respectively. An oil reservoir (132) is fixedly connected between the two threaded sleeves (126). Four first one-way valve pipes (133) are respectively connected around the top of the oil reservoir (132).

5. The planetary roller screw structure according to claim 4, characterized in that: The bottom of the oil tank (132) is connected to four second one-way valve pipes (134). One end of the first one-way valve pipe (133) and the second one-way valve pipe (134) are connected to a rectangular piece (135). The outer wall of the rectangular piece (135) is fixedly connected to the inner wall of the threaded sleeve (126). A piston plate (136) is slidably connected to the middle of the inner wall of the oil tank (132).

6. The planetary roller screw structure according to claim 5, characterized in that: Both sides of the piston plate (136) are fixedly connected to round rods (137), and one end of the round rods (137) is fixedly connected to a square plate (138). The square plate (138) is located outside the oil reservoir (132). Both sides of the piston plate (136) are fixedly connected to tension springs (139), and one end of the tension springs (139) is fixedly connected to one side of the inner wall of the oil reservoir (132).

7. The planetary roller screw structure according to claim 4, characterized in that: An auxiliary component (116) is provided at the end of the crossbar (125). The auxiliary component (116) includes a ring plate (141) fixedly connected to both ends of the crossbar (125). A fixing rod (142) is fixedly connected to both ends of one side of the ring plate (141). A sleeve rod (143) is fixedly connected to the outer wall of one end of the fixing rod (142). A sponge strip (144) is fixedly connected to one side of the sleeve rod (143).

8. The planetary roller screw structure according to claim 7, characterized in that: One side of the sponge strip (144) is slidably connected to the inner wall of the threaded sleeve (126). A bent plate (145) is fixedly connected to one side of the outer wall of the threaded sleeve (126). A sliding rod (146) is slidably connected to both ends of one side of the bent plate (145). A sealing plate (147) is fixedly connected to the outer wall of one end of the sliding rod (146).

9. The planetary roller screw structure according to claim 8, characterized in that: A compression spring (148) is fixedly connected to one side of the sealing plate (147). One end of the compression spring (148) is fixedly connected to one side of the inner wall of the curved plate (145). Square holes (149) are opened at both ends of one side of the outer wall of the threaded sleeve (126). One end of the sliding rod (146) is slidably connected to the inner wall of the square hole (149). A strip hole (140) is opened on the outer wall side of the threaded sleeve (126) near the square hole (149).

10. The method of using the planetary roller screw structure according to any one of claims 1-9, characterized in that: The usage method includes the following steps: S1, start the motor (111), the motor (111) drives the roller screw (112) to rotate, the rotation of the roller screw (112) causes the screw sleeve (121) to rotate around the inner wall of the threaded sleeve (126), the screw sleeve (121) drives the cross bar (125) and the gear (122) to rotate around the inner wall of the gear ring (123), and the cross bar (125) drives the rotating plate (124) to rotate around the inner wall of the threaded sleeve (126). During this process, the threaded sleeve (126) is limited by the threads of the roller screw (112) and the screw sleeve (121), so that the threaded sleeve (126) drives the positioning plate (127) to move laterally on the inner wall of the limiting groove (113). Through the double threaded sleeve (126), it can slide along the outer wall of the roller screw (112) at the same time, which is suitable for operation under large loads; S2, when the threaded sleeve (126) moves, the threaded sleeve (126) drives the oil reservoir (132) and the strip box (131) to move. The oil reservoir (132) drives the piston plate (136), the round rod (137) and the square plate (138) to move. When the square plate (138) on the left moves towards the square box (102), the square plate (138) will contact the side wall of the square box (102) and be squeezed by the square box (102). This causes the square plate (138) to drive the round rod (137) and the piston plate (136) to slide to the right on the inner wall of the oil reservoir (132). The piston plate (136) moves... During the operation, the lubricating oil on the right side of the oil reservoir (132) is squeezed, so that the lubricating oil in the right area enters the threaded sleeve (126) through the first one-way valve pipe (133) and the rectangular piece (135). When the square plate (138) on the right side moves toward the fixed plate (103), it is squeezed by the fixed plate (103) and performs the same movement as above, lubricating the inner wall of the threaded sleeve (126). Under the control of the position sensor, when one end of the oil reservoir (132) is about to approach the square box (102) or the fixed plate (103), the motor (111) will be controlled to stop running. S3, when the piston plate (136) squeezes the lubricating oil inside the oil reservoir (132), a negative pressure is generated in another area inside the oil reservoir (132). The negative pressure absorbs the lubricating oil at the bottom of the inner wall of the threaded sleeve (126) through the second one-way valve pipe (134) and the rectangular piece (135). S4, when multiple crossbars (125) drive multiple screw sleeves (121) to rotate around the thread of the roller screw (112), the crossbars (125) drive the ring plate (141) to rotate, and the ring plate (141) drives the fixed rod (142), sleeve rod (143) and sponge strip (144) to rotate. During the rotation of the sponge strip (144), it can absorb the lubricating oil that remains inside the threaded sleeve (126). At the same time, when the sponge strip (144) absorbs the lubricating oil and rotates, it can make the lubricating oil fully coated on the inner wall of the threaded sleeve (126). S5, when the crossbar (125) drives the lead screw sleeve (121) to rotate around the outer wall of the roller screw (112), the outer wall of the lead screw sleeve (121) will contact the side wall of one end of the sliding rod (146) that enters the threaded sleeve (126) and squeeze the sliding rod (146), causing the sliding rod (146) to drive the sealing plate (147) to move in the opposite direction. The sealing plate (147) will no longer block the strip hole (140), thereby continuously allowing the outside air to interact with the air inside the threaded sleeve (126) and cooling the airflow inside the threaded sleeve (126).

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