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CN-122014819-A - Planetary roller screw structure

CN122014819ACN 122014819 ACN122014819 ACN 122014819ACN-122014819-A

Abstract

The invention provides a planetary roller screw structure, which belongs to the technical field of servo transmission mechanisms and comprises a workbench, wherein a square box is fixedly connected to the top of the workbench, lubricating oil in an oil storage tank is extruded in the moving process of a piston plate, so that the lubricating oil enters the interior of a thread sleeve box through a first one-way valve pipe and a rectangular piece, the inner wall of the thread sleeve box is lubricated, friction among a roller screw, a screw rod sleeve and the thread sleeve box is effectively reduced, noise and abrasion of equipment in the running process are reduced, and the good running state of the equipment is maintained. When the piston plate extrudes the lubricating oil in the oil storage tank, negative pressure is generated in the other area in the oil storage tank, and the negative pressure absorbs the lubricating oil at the bottom of the inner wall of the threaded sleeve through the second one-way valve pipe and the rectangular piece, so that the recycling of the lubricating oil is realized. The design can reduce the waste of lubricating oil and improve the economical efficiency of the whole system.

Inventors

  • LIU YI
  • PAN HONGMIAO
  • Xu Longliang
  • HU XUECHENG
  • LAN HENGZHI
  • DAI ZIQIANG

Assignees

  • 江苏星际求索机器人科技有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. The planetary roller screw structure comprises a workbench (101), wherein a square box (102) is fixedly connected to the top of the workbench (101), and a fixing plate (103) is fixedly connected to one side of the top of the workbench (101), and the planetary roller screw structure is characterized by further comprising: Planetary roller screw mechanism (104), planetary roller screw mechanism (104) are including motor (111) at square chest (102) inner wall one side both ends, the output fixedly connected with roller screw (112) of motor (111), the one end outer wall rotation of roller screw (112) is connected in the inner wall department of fixed plate (103), spacing groove (113) have all been seted up to the both sides of workstation (101), the outer wall of roller screw (112) is provided with stabilizing assembly (114) for accurate stable carries out power transmission to the material.
  2. 2. The planetary roller screw structure according to claim 1, wherein the stabilizing assembly (114) comprises six screw sleeves (121) which are connected around the outer wall of the roller screw (112) in a threaded manner, a cross rod (125) is fixedly connected to the inner wall of the screw sleeve (121), gears (122) are fixedly connected to the outer walls of two ends of the cross rod (125), two rotating plates (124) are rotatably connected to the outer walls of two ends of the cross rod (125) close to the gears (122), and a toothed ring (123) is fixedly connected to one side of each rotating plate (124).
  3. 3. The planetary roller screw structure according to claim 2, wherein the inner wall of the toothed ring (123) is engaged and connected to one side of the outer wall of the gear (122), the outer wall of the rotating plate (124) is rotatably connected with a threaded sleeve (126), the middle end of the inner wall of the threaded sleeve (126) is in threaded connection with the outer wall of the screw rod sleeve (121), one side of the outer wall of the threaded sleeve (126) is fixedly connected with a positioning plate (127), and one end of the positioning plate (127) is in sliding connection with the inner wall of the limiting groove (113).
  4. 4. The planetary roller screw structure according to claim 3, wherein a lubrication assembly (115) is arranged at the end of the screw sleeve (126), the lubrication assembly (115) comprises strip-shaped boxes (131) fixedly connected to the top and the bottom of the screw sleeve (126), an oil storage tank (132) is fixedly connected between the two screw sleeve (126), and four first check valve pipes (133) are respectively communicated around the top of the oil storage tank (132).
  5. 5. The planetary roller screw structure according to claim 4, wherein four second check valve pipes (134) are respectively communicated with the periphery of the bottom of the oil storage tank (132), rectangular pieces (135) are respectively communicated with one ends of the first check valve pipes (133) and the second check valve pipes (134), the outer walls of the rectangular pieces (135) are fixedly connected to the inner wall of the threaded sleeve (126), and piston plates (136) are slidably connected to the middle ends of the inner walls of the oil storage tank (132).
  6. 6. The planetary roller screw structure according to claim 5, wherein round rods (137) are fixedly connected to two sides of the piston plate (136), one end of each round rod (137) is fixedly connected with a square plate (138), the square plates (138) are arranged outside the oil storage tank (132), tension springs (139) are fixedly connected to two sides of the piston plate (136), and one end of each tension spring (139) is fixedly connected to one side of the inner wall of the oil storage tank (132).
  7. 7. The planetary roller screw structure according to claim 4, wherein an auxiliary assembly (116) is arranged at the end part of the cross rod (125), the auxiliary assembly (116) comprises annular plates (141) fixedly connected to the two ends of the cross rod (125), fixing rods (142) are fixedly connected to the two ends of one side of each annular plate (141), a sleeve rod (143) is fixedly connected to the outer wall of one end of each fixing rod (142), and sponge strips (144) are fixedly connected to one side of each sleeve rod (143).
  8. 8. The planetary roller screw structure according to claim 7, wherein one side of the sponge strip (144) is slidably connected to an inner wall of the threaded sleeve (126), a bending plate (145) is fixedly connected to one side of the outer wall of the threaded sleeve (126), two ends of one side of the bending plate (145) penetrate through and are slidably connected with a sliding rod (146), and a blocking plate (147) is fixedly connected to one end outer wall of the sliding rod (146).
  9. 9. The planetary roller screw structure according to claim 8, wherein the periphery of one side of the plugging plate (147) is fixedly connected with a compression spring (148), 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 formed in two 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), and a strip-shaped hole (140) is formed in one side of the threaded sleeve (126) close to the outer wall of the square hole (149).
  10. 10. The method of using a planetary roller screw structure according to any one of claims 1 to 9, wherein the method of using the planetary roller screw structure comprises the steps of: S1, starting a motor (111), wherein the motor (111) drives a roller screw (112) to rotate, the roller screw (112) rotates to enable a screw rod sleeve (121) to circumferentially rotate around the inner wall of a thread sleeve box (126), the screw rod sleeve (121) drives a cross rod (125) and a gear (122) to circumferentially rotate on the inner wall of a toothed ring (123), the cross rod (125) drives a rotating plate (124) to circumferentially rotate on the inner wall of the thread sleeve box (126), in the process, the thread sleeve box (126) is limited by threads of the roller screw (112) and the screw rod sleeve (121), so that the thread sleeve box (126) drives a positioning plate (127) to transversely move on the inner wall of a limiting groove (113), and the cross rod sleeve box (126) can simultaneously slide along the outer wall of the roller screw (112), so that the roller screw box is suitable for running under a large load; S2, when the threaded sleeve (126) moves, the threaded sleeve (126) drives the oil storage tank (132) and the strip-shaped tank (131) to move, the oil storage tank (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) contacts with the side wall of the square box (102) and is extruded by the square box (102), the square plate (138) drives the round rod (137) and the piston plate (136) to slide rightwards on the inner wall of the oil storage tank (132), the piston plate (136) extrudes lubricating oil on the right side inside the oil storage tank (132) in the moving process of the piston plate (136), the lubricating oil in the right side area enters into the threaded sleeve (126) through the first one-way valve tube (133) and the rectangular piece (135), when the square plate (138) on the right side moves towards the fixed plate (103), the same movement is carried out by extrusion of the fixed plate (103), the position of the inner wall of the threaded sleeve (126) is controlled, and the motor (126) is controlled to be close to one end of the oil storage tank (102) or is controlled to stop; S3, when the piston plate (136) extrudes lubricating oil in the oil storage tank (132), negative pressure is generated in the other area in the oil storage tank (132), and 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 the cross rods (125) drive the screw rod sleeves (121) to rotate circumferentially around the threads of the roller screw rods (112), the cross rods (125) drive the annular plates (141) to rotate circumferentially, the annular plates (141) drive the fixing rods (142), the sleeve rods (143) and the sponge strips (144) to move circumferentially, lubricating oil staying in the thread sleeve boxes (126) can be absorbed in the circumferential movement process of the sponge strips (144), and meanwhile, when the sponge strips (144) absorb the lubricating oil to rotate, the lubricating oil can be comprehensively coated on the inner walls of the thread sleeve boxes (126); S5, when the cross rod (125) drives the screw rod sleeve (121) to rotate circumferentially around the outer wall of the roller screw rod (112), the outer wall of the screw rod sleeve (121) can be contacted with one end side wall of the sliding rod (146) entering the thread sleeve box (126), the sliding rod (146) is extruded, the sliding rod (146) drives the plugging plate (147) to move reversely, the plugging plate (147) does not plug the strip-shaped hole (140), and accordingly outside air and air inside the thread sleeve box (126) are enabled to interact continuously, and air flow inside the thread sleeve box (126) is cooled.

Description

Planetary roller screw structure Technical Field The invention belongs to the technical field of servo transmission mechanisms, and particularly relates to a planetary roller screw structure. Background A planetary roller screw structure is an advanced mechanical transmission system, which is combined with a planetary roller mechanism and aims to improve transmission efficiency and bearing capacity. The structure is an efficient and precise mechanical transmission solution, is suitable for various high-end application occasions, and has wide development prospect. The patent document CN121322596A discloses a multistage planetary roller screw pair structure, belongs to the technical field of servo transmission mechanisms, and comprises a first-stage screw, a first-stage roller, a first-stage nut, an angular contact bearing II, a first-stage actuating cylinder, a second-stage screw, a second-stage roller, a second-stage nut, a shell and a switching shaft, and thus a first-stage planetary roller screw pair nesting structure and a second-stage planetary roller screw pair nesting structure are formed. Simultaneously, the linear motion speed ratio of different grading screw pairs is controlled by adjusting the thread lead of a secondary screw, the precise control of the movement speed of the tail end effective load is realized, the nuts at all levels design a guide structure in the stroke range, and the tail end output load of the structure has higher stability. Although the above patent can realize that the output load at the tail end of the structure has stability, the noise phenomenon generated during the cooperation between the structures cannot be effectively solved in the moving process, that is, when the planetary roller screw mechanism is adopted to operate in the prior art, the relative movement between the components and the friction characteristic of the contact point lead to noise generation. Noise generated by the cooperation transmission between the components not only affects the normal operation of the equipment, but also can bring a series of negative effects, such as accelerated equipment wear, increased failure rate, deteriorated working environment and the like. Therefore, these factors need to be taken into account in the design and implementation process to reduce noise and improve overall system performance and reliability. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a planetary roller screw structure, which effectively solves the problems of relative movement between components and friction characteristics of contact points in the prior art when the planetary roller screw mechanism is adopted for running, thereby generating noise. Noise generated by the cooperation transmission between the components not only affects the normal operation of the equipment, but also can bring a series of negative effects, such as problems of accelerated equipment abrasion, increased failure rate and worsened working environment. In order to achieve the above purpose, the technical scheme is that the planetary roller screw structure comprises a workbench, wherein a square box is fixedly connected to the top of the workbench, a fixing plate is fixedly connected to one side of the top of the workbench, the planetary roller screw structure comprises a motor fixedly connected to two ends of one side of the inner wall of the square box, the output end of the motor is fixedly connected with a roller screw, one end outer wall of the roller screw is rotatably connected to the inner wall of the fixing plate, limiting grooves are formed in two sides of the workbench, and a stabilizing assembly is arranged on the outer wall of the roller screw and used for accurately and stably transmitting power to materials. Preferably, the stabilizing assembly comprises six screw rod sleeves which are in threaded connection with the periphery of the outer wall of the roller screw rod, the inner wall of each screw rod sleeve is fixedly connected with a cross rod, gears are fixedly connected to the outer walls of the two ends of each cross rod, two rotating plates are rotatably connected to the outer walls of the two ends of each cross rod, which are close to the gears, and a toothed ring is fixedly connected to one side of each rotating plate. Preferably, the inner wall meshing of ring gear is connected in outer wall one side of gear, the outer wall rotation of rotor plate is connected with the screw thread case, the inner wall middle-end threaded connection of screw thread case is in the outer wall department of screw rod cover, outer wall one side fixedly connected with locating plate of screw thread case, the one end outer wall sliding connection of locating plate is in the inner wall department of spacing groove. Preferably, the end of the screw thread sleeve box is provided with a lubrication assembly, the lubrication assembly comprises strip-shaped boxes which are respectively and