Planetary roller screw assembling device and assembling method

Abstract

The invention relates to the technical field of lead screw assembling, in particular to a planetary roller lead screw assembling device and assembling method.The planetary roller lead screw assembling device comprises a rack, a clamp lifting assembly, a clamp lifting table, a clamp mechanism, a plurality of buckle assemblies, a lower-layer buckle support, an upper-layer buckle lifting table, an upper-layer buckle lifting assembly, a buckle telescopic driving assembly and a controller; the clamp lifting assembly is used for driving the clamp lifting table to ascend and descend, and the upper-layer buckle lifting assembly is used for driving the upper-layer buckle lifting table to ascend and descend. Aiming at the technical problem that assembling of the planetary roller lead screw is inconvenient, compared with an existing assembling clamp, the assembling clamp has the advantages that the automation degree is higher, the assembling efficiency can be greatly improved, and rapid assembling of the planetary roller lead screw is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of screw assembly, and in particular to a planetary roller screw assembly device and an assembly method. Background Art

[0002] Planetary roller screw is a new transmission device that converts rotational motion into linear motion, including rollers, screws, cages, screw nuts and cage retaining rings, etc. Due to its advantages of large load capacity, high precision, high efficiency, no pollution and easy maintenance, it is gradually used in industrial fields such as aerospace, vehicles and precision machine tools.

[0003] However, the existing planetary roller screws are mainly assembled manually, lacking specific mechanical devices for assembly. In the prior art, taking patent CN216759692U as an example, the planetary roller screw assembly fixture is assembled through the upper mounting arm, base, hollow screw fixture device and retainer clamping device. Although the whole set of devices can complete the assembly of the planetary roller screw pair, this patent requires manual operation throughout the process, the degree of automation is not high, the assembly efficiency is low, and the assembly speed is slow. Summary of the invention

[0004] In response to the technical problem that the assembly of planetary roller screws is relatively inconvenient, the present invention provides a planetary roller screw assembly device, which has a higher degree of automation than the existing assembly fixture, can greatly improve the assembly efficiency, and realize the rapid assembly of planetary roller screws.

[0005] The technical solution provided by the present invention is: a planetary roller screw assembly device, including a frame, a clamp lifting assembly, a clamp lifting platform, a clamp mechanism, a plurality of buckle assemblies, a lower buckle bracket, an upper buckle lifting platform, an upper buckle lifting assembly, a buckle telescopic drive assembly and a controller; the clamp lifting assembly is used to drive the lifting of the clamp lifting platform, and the upper buckle lifting assembly is used to drive the lifting of the upper buckle lifting platform; the upper buckle lifting platform is located on the upper side of the frame, the lower buckle bracket is located between the frame and the upper buckle lifting platform, and the lower buckle bracket is fixedly connected to the frame; the clamp mechanism includes a clamp threaded table, a clamp rotating table, an inner The bracket, the retaining bracket clamp assembly, the screw clamp bracket and the screw clamp assembly; the upper side of the clamp lifting platform is provided with an assembly cavity, the clamp threaded platform is located in the assembly cavity, and the circumferential outer wall of the clamp threaded platform is threadedly matched with the circumferential inner wall of the assembly cavity; the inner bracket is arranged on the clamp threaded platform, and the middle part of the inner bracket protrudes to one side to form a connecting seat, and the connecting seat passes through the center of the clamp lifting platform and the clamp rotating platform; the clamp rotating platform is annular, and the inner annular surface of the clamp rotating platform is movably matched with the circumferential outer side of the inner bracket, and the outer annular surface of the clamp rotating platform abuts against the inner wall of the clamp threaded platform; the screw clamp bracket is fixedly arranged on the On the clamp lifting platform, the screw clamp assembly is arranged on the screw clamp bracket, and the retaining frame clamp assembly is arranged on the clamp rotating platform and the inner bracket; the buckle assembly is located on the lower buckle bracket and the upper buckle lifting platform, the buckle assembly includes a buckle wheel and a buckle rod, the lower buckle bracket and the upper buckle lifting platform are provided with a plurality of limiting slots, the buckle rod is movably matched with the limiting slots, the buckle wheel and the buckle rod form a gear rack cooperation, and an open buckle ring is fixedly provided on one side of the buckle rod; the buckle telescopic drive assembly includes a driving part, a telescopic transmission main gear, a plurality of telescopic transmission sub-gears, a plurality of telescopic transmission rods and a plurality of The telescopic transmission sleeve rod is connected with the telescopic transmission main gear, the telescopic transmission main gear is meshed with the telescopic transmission sub-gear, the inner side of the telescopic transmission sub-gear is provided with an internal thread, the outer side of the telescopic transmission rod is provided with an external thread, the telescopic transmission sub-gear and the telescopic transmission rod are meshed with each other through the internal thread and the external thread; the telescopic transmission sleeve rod is sleeved with the telescopic transmission rod, the snap wheel on the lower snap bracket is fixedly connected with the telescopic transmission rod, and the snap wheel on the upper snap lifting platform is fixedly connected with the telescopic transmission sleeve rod; the clamp lifting assembly, the upper snap lifting assembly and the driving unit are all electrically connected with the controller.

[0006] Optionally, the clamp lifting assembly includes a first motor, a lifting transmission shaft, a first main gear, a plurality of first sub-gears and a plurality of first lifting screws; the first motor is electrically connected to the controller; the first motor is fixed on the frame, the lifting transmission shaft is movably arranged on the frame, the lifting transmission shaft is transmission-connected to the first motor, the first main gear is fixed to one end of the lifting transmission shaft, a plurality of first sub-gears are all meshed with the first main gear, an internal thread is provided on the inner side of the first sub-gear, each of the first sub-gears is threadably meshed with the corresponding first lifting screw through the internal thread, and the top of the first lifting screw is movably connected to the bottom of the clamp lifting platform.

[0007] Optionally, it also includes a first main bevel gear, a first driving transmission rod, a first sub-bevel gear, a first main sprocket, a first sub-sprocket and a first chain; the first main bevel gear is fixedly arranged at the output end of the first motor, the first driving transmission rod is movably arranged on the frame, the first sub-bevel gear is fixedly arranged at one end of the first driving transmission rod, the first main bevel gear is meshed with the first sub-bevel gear, the first main sprocket is arranged at the other end of the first driving transmission rod, the first sub-sprocket is fixedly arranged at the bottom end of the lifting transmission shaft, and the first main sprocket and the first sub-sprocket are connected through the first chain transmission.

[0008] Optionally, the upper buckle lifting assembly includes a second motor, a height adjustment transmission hollow wheel, a second main gear, a plurality of second sub-gears and a plurality of second lifting screws; the second motor is electrically connected to the controller; the second motor is fixed on the frame, the height adjustment transmission hollow wheel is sleeved on the outer side of the lifting transmission shaft, the lifting transmission shaft is transmission-connected to the second motor, the second main gear is fixed to one end of the height adjustment transmission hollow wheel, a plurality of second sub-gears are all meshed with the second main gear, an internal thread is provided on the inner side of the second sub-gear, each second sub-gear is threadably meshed with the corresponding second lifting screw through the internal thread, and the top of the second lifting screw is movably connected to the bottom of the upper buckle lifting platform.

[0009] Optionally, it also includes a second main bevel gear, a second driving transmission rod, a second secondary bevel gear, a second main sprocket, a second secondary sprocket and a second chain; the second main bevel gear is fixedly arranged at the output end of the second motor, the second driving transmission rod is movably arranged on the frame, the second secondary bevel gear is fixedly arranged at one end of the second driving transmission rod, the second main bevel gear is meshed with the second secondary bevel gear, the second main sprocket is arranged at the other end of the second driving transmission rod, the second secondary sprocket is fixedly arranged at the bottom of the height adjustment transmission hollow wheel, and the second main sprocket and the second secondary sprocket are connected through the second chain transmission.

[0010] Optionally, the driving unit includes a third motor and a telescopic transmission hollow wheel; the third motor is electrically connected to the controller; the third motor is fixed on the frame, the telescopic transmission hollow wheel is sleeved on the outer side of the height adjustment transmission hollow wheel, the third motor and the telescopic transmission hollow wheel are transmission connected, and the telescopic transmission main gear is fixedly arranged on one end of the telescopic transmission hollow wheel.

[0011] Optionally, it also includes a third main bevel gear, a third driving transmission rod, a third sub-bevel gear, a third main sprocket, a third sub-sprocket and a third chain; the third main bevel gear is fixedly arranged at the output end of the third motor, the third driving transmission rod is movably arranged on the frame, the third sub-bevel gear is fixedly arranged at one end of the third driving transmission rod, the third main bevel gear is meshed with the third sub-bevel gear, the third main sprocket is arranged at the other end of the third driving transmission rod, and the third sub-sprocket is fixedly arranged at the bottom of the height adjustment transmission hollow wheel, and the third main sprocket and the third sub-sprocket are connected through the third chain transmission.

[0012] Optionally, the retaining frame clamp assembly includes a plurality of retaining frame clamp rods, a first clamping elastic band, a first expansion plate, a first compression spring, a first threaded fastener and a first nut; the plurality of retaining frame clamp rods are distributed circumferentially on the clamp rotating table, and one end of the retaining frame clamp rods is hinged to the rotating table, the first clamping elastic band is sleeved on the outer side of the circular structure enclosed by the upper end of the retaining frame clamp rod, the diameter of the circular structure enclosed by the upper end of the retaining frame clamp rod is smaller than the diameter of the circular structure enclosed by the lower end of the retaining frame clamp rod; a first adjustment section is provided in the middle part of the retaining frame clamp rod, the first adjustment section encloses a conical structure which is smaller at the top and larger at the bottom, the first expansion plate is located in the conical structure formed by the first adjustment section and abuts against the inner side of the first adjustment section, the first compression spring is located between the first expansion plate and the inner bracket, and the first threaded fastener passes through the first expansion plate, the first compression spring and the inner bracket and is fixedly connected by the first nut.

[0013] Optionally, the screw clamp assembly includes a plurality of screw clamp rods, a second clamping elastic band, a second expansion plate, a second compression spring, a second threaded fastener and a second nut; the plurality of screw clamp rods are distributed circumferentially on the screw clamp bracket, and one end of the screw clamp rods is hinged to the screw clamp bracket, the second clamping elastic band is sleeved on the outer side of the circular structure enclosed by the upper end of the screw clamp rod, and the diameter of the circular structure enclosed by the upper end of the screw clamp rod is smaller than the diameter of the circular structure enclosed by the lower end of the screw clamp rod; a second adjustment section is provided in the middle part of the screw clamp rod, and the second adjustment section encloses a conical structure with a small upper part and a large lower part, the second expansion plate is located in the conical structure formed by the second adjustment section and abuts against the inner side of the second adjustment section 610, the second compression spring is located between the second expansion plate and the screw clamp bracket, and the second threaded fastener passes through the second expansion plate, the second compression spring and the screw clamp bracket and is fixedly connected by the second nut.

[0014] An assembly method, using the above-mentioned planetary roller screw assembly device, is characterized in that it includes: fixing the retainer on the retainer clamp assembly, fixing the screw on the screw clamp assembly, rotating the clamp threaded table to adjust the height of the retainer clamp assembly so that the retainer is located below the plane of the screw end; according to the actual length of the roller and the screw, using the controller to control the clamp lifting assembly to adjust the height of the clamp mechanism, and using the controller to control the upper buckle lifting assembly to adjust the height of the buckle assembly located on the upper buckle lifting table; clamping the roller according to the calculated angle and length into the The lower layer clip bracket and the clip ring on the upper layer clip lifting platform; use the controller to control the driving part of the clip telescopic drive assembly to match the roller with the screw; rotate the fixture threaded table to adjust the height of the retaining frame clamp assembly to make the retaining frame match with the screw and the roller; use the controller to control the driving part of the clip telescopic drive assembly to retract the clip ring; use the controller to control the fixture lifting assembly to adjust the height of the clamp mechanism, lift the assembly, screw in the screw nut, loosen the retaining frame clamp assembly and the screw clamp assembly, and install the retaining frame retaining ring to successfully install the entire planetary roller screw pair.

[0015] Beneficial Effects

[0016] The technical solution provided by the present invention has the following beneficial effects compared with the prior art: in order to solve the technical problem that the assembly of planetary roller screws is inconvenient, the present invention has a higher degree of automation compared with the existing assembly fixture, can greatly improve the assembly efficiency, and realize the rapid assembly of planetary roller screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic structural diagram of a planetary roller screw assembly device proposed in an embodiment of the present invention.

[0018] Figure 2 This is a schematic structural diagram of a clamp mechanism proposed in an embodiment of the present invention.

[0019] Figure 3 A buckle assembly is provided in an embodiment of the present invention.

[0020] Figure 4 A schematic diagram of the partial structure of a planetary roller screw assembly device proposed in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0022] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the invention are shown in the accompanying drawings. The words "first", "second", etc. described in the present invention are set for the convenience of describing the technical solution of the present invention, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present invention. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradictions or conflicts, all of which are within the scope of protection required by the present invention.

[0023] Example 1

[0024] Combined with Figure 1-4 This embodiment proposes a planetary roller screw assembly device, including a frame 10, a clamp lifting assembly, a clamp lifting platform 11, a clamp mechanism, a plurality of buckle assemblies, a lower buckle bracket 12, an upper buckle lifting platform 13, an upper buckle lifting assembly, a buckle telescopic drive assembly and a controller.

[0025] The clamp lifting assembly is used to drive the clamp lifting platform 11 to rise and fall, and the upper buckle lifting assembly is used to drive the upper buckle lifting platform 13 to rise and fall; the upper buckle lifting platform 13 is located on the upper side of the frame 10, and the lower buckle bracket 12 is located between the frame 10 and the upper buckle lifting platform 13, and the lower buckle bracket 12 is fixedly connected to the frame 10.

[0026] The fixture mechanism includes a fixture threaded platform 14, a fixture rotating platform 15, an inner bracket 16, a retainer fixture assembly, a screw fixture bracket 17 and a screw fixture assembly; an assembly cavity 110 is provided on the upper side of the fixture lifting platform 11, the fixture threaded platform 14 is located in the assembly cavity 110, and the circumferential outer wall of the fixture threaded platform 14 is threadedly matched with the circumferential inner wall of the assembly cavity 110; the inner bracket 16 is arranged on the fixture threaded platform 14, and the middle part of the inner bracket 16 protrudes to one side to form a connecting seat 160 The connecting seat 160 passes through the center of the fixture lifting platform 11 and the fixture rotating platform 15; the fixture rotating platform 15 is annular, and the inner annular surface of the fixture rotating platform 15 is movably matched with the circumferential outer side of the inner bracket 16, and the outer annular surface of the fixture rotating platform 15 is in contact with the inner wall of the fixture threaded platform 14; the screw clamp bracket 17 is fixed on the fixture lifting platform 11, the screw clamp assembly is arranged on the screw clamp bracket 17, and the retaining frame clamp assembly is arranged on the fixture rotating platform 15 and the inner bracket 16.

[0027] The buckle assembly is located on the lower buckle bracket 12 and the upper buckle lifting platform 13. The buckle assembly includes a buckle wheel 18 and a buckle rod 19. A plurality of limiting slots are provided on the lower buckle bracket 12 and the upper buckle lifting platform 13. The buckle rod 19 is movably matched with the limiting slots. A gear rack is formed between the buckle wheel 18 and the buckle rod 19. An open buckle ring 20 is fixedly provided on one side of the buckle rod 19.

[0028] The snap-on telescopic drive assembly includes a drive unit, a telescopic transmission main gear 21, a plurality of telescopic transmission sub-gears 22, a plurality of telescopic transmission rods 23 and a plurality of telescopic transmission sleeve rods 24. The drive unit is transmission-connected with the telescopic transmission main gear 21, the telescopic transmission main gear 21 is meshed with the telescopic transmission sub-gear 22, an internal thread is provided on the inner side of the telescopic transmission sub-gear 22, an external thread is provided on the outer side of the telescopic transmission rod 23, the telescopic transmission sub-gear 22 and the telescopic transmission rod 23 are meshed with each other through the internal thread and the external thread; the telescopic transmission sleeve rod 24 is sleeved with the telescopic transmission rod 23, the snap-on wheel 18 located on the lower snap-on bracket 12 is fixedly connected with the telescopic transmission rod 23, and the snap-on wheel 18 located on the upper snap-on lifting platform 13 is fixedly connected with the telescopic transmission sleeve rod 24.

[0029] Among them, the clamp lifting assembly, the upper buckle lifting assembly and the driving part are all electrically connected to the controller.

[0030] In order to solve the technical problem that the assembly of planetary roller screws is inconvenient, the present embodiment provides a planetary roller screw assembly device, which has a higher degree of automation compared to the existing assembly fixture, can greatly improve the assembly efficiency, and realize the rapid assembly of planetary roller screws.

[0031] The planetary roller screw assembly device of this embodiment is used to assemble the planetary roller screw as follows: first, the retainer is fixed to the retainer clamp assembly, the screw is fixed to the screw clamp assembly, and the height of the retainer clamp assembly is adjusted by rotating the clamp threaded platform 14 so that the retainer is located below the plane of the screw end. The purpose is to prevent the retainer from hindering the roller from matching with the screw.

[0032] Then, according to the actual length of the roller and the lead screw, the controller is used to control the clamp lifting assembly to adjust the height of the clamp mechanism, and the controller is used to control the upper buckle lifting assembly to adjust the height of the buckle assembly located on the upper buckle lifting platform 13.

[0033] Then, the roller is clamped into the clamping ring 20 located on the lower clamping bracket 12 and the upper clamping lifting platform 13 according to the calculated angle and length.

[0034] The controller is then used to control the driving part of the buckle telescopic driving assembly to match the roller with the lead screw.

[0035] Afterwards, the fixture threaded table 14 is rotated to adjust the height of the retainer fixture assembly so that the retainer is matched with the lead screw and the roller.

[0036] The controller is then used to control the driving part of the buckle telescopic driving assembly to retract the snap ring 20. The controller is also used to control the fixture lifting assembly to adjust the height of the fixture mechanism, lift the assembly, screw in the lead screw nut, loosen the cage fixture assembly and the lead screw fixture assembly, and install the cage retaining ring to successfully install the entire planetary roller screw pair.

[0037] In combination with the above content, it can be known that the planetary roller screw assembly device clamps the screw and the retaining frame through a clamping mechanism, and the height of the retaining frame relative to the screw can be adjusted.

[0038] Among them, the height of the retaining frame relative to the lead screw is adjusted by rotating the clamp threaded platform 14. In combination with the attached drawings, it can be seen that the principle is that since the circumferential outer wall of the clamp threaded platform 14 is threadedly matched with the circumferential inner wall of the assembly cavity 110, the rotation of the clamp threaded platform 14 can be converted into the lifting and lowering of the clamp threaded platform 14 relative to the clamp lifting platform 11. The clamp threaded platform 14 is a structure for supporting the clamp rotating platform 15 and the inner bracket 16, which can drive the lifting and lowering movement of the clamp rotating platform 15 and the inner bracket 16, thereby driving the adjustment of the height of the retaining frame clamp assembly. Since the lead screw clamp assembly is fixed by the lead screw clamp bracket 17, and the lead screw clamp bracket 17 is fixedly connected to the clamp lifting platform 11, the lead screw clamp assembly itself will not change in height. Therefore, the adjustment of the height of the retaining frame clamp assembly realizes the relative height adjustment of the retaining frame and the lead screw.

[0039] In a more preferred embodiment, the threads of the circumferential outer wall of the clamp threaded platform 14 and the circumferential inner wall of the assembly cavity 110 cooperate to form a self-locking thread structure, thereby ensuring position locking after height adjustment.

[0040] The retainer clamp assembly realizes the clamping of the retainer to be assembled. In one embodiment, the retainer clamp assembly includes a plurality of retainer clamping rods 55, a first clamping elastic band 56, a first expansion plate 57, a first compression spring 58, a first threaded fastener 59 and a first nut 60. A plurality of retaining frame clamping rods 55 are distributed on the fixture rotating table 15 along the circumferential direction, and one end of the retaining frame clamping rods 55 are hinged to the rotating table, and the first clamping elastic band 56 is sleeved on the outer side of the circumferential structure enclosed by the upper end of the retaining frame clamping rods 55, and the diameter of the circumferential structure enclosed by the upper end of the retaining frame clamping rods 55 is smaller than the diameter of the circumferential structure enclosed by the lower end of the retaining frame clamping rods 55; a first adjustment section 550 is arranged in the middle part of the retaining frame clamping rod 55, and the first adjustment section 550 encloses a conical structure which is small at the top and large at the bottom, the first expansion plate 57 is located in the conical structure formed by the first adjustment section 550 and abuts against the inner side of the first adjustment section 550, the first compression spring 58 is located between the first expansion plate 57 and the inner bracket 16, and the first threaded fastener 59 passes through the first expansion plate 57, the first compression spring 58 and the inner bracket 16 and is fixedly connected by the first nut 60.

[0041] In combination with the above-mentioned embodiment, the working principle of the retaining frame clamping assembly for clamping the retaining frame is: the retaining frame is arranged on the outer side of the circumferential structure enclosed by the upper end of the retaining frame clamping rod 55, that is, the retaining frame clamping rod 55 abuts against the inner side of the retaining frame and maintains an outward spreading force to fix the retaining frame to the outer side of the circular structure enclosed by the upper end of the retaining frame clamping rod 55.

[0042] The degree to which the retaining frame clamp rod 55 is stretched outward can be adjusted by adjusting the distance of the first expansion plate 57 relative to the inner bracket 16. The principle is: when the first threaded fastener 59 is rotated, the distance of the first expansion plate 57 relative to the inner bracket 16 changes. Since the first adjustment section 550 encloses a conical structure that is small at the top and large at the bottom, after the first expansion plate 57 abuts against the first adjustment section 550, the first expansion plate 57 will change the inclination of the retaining frame clamp rod 55, thereby changing the degree to which the retaining frame clamp rod 55 is stretched outward. The first compression spring 58 is used to ensure that the first expansion plate 57 is always in contact with the first adjustment section 550. The first clamping elastic band 56 is used to constrain the circumferential structure enclosed by the upper end of the retaining frame clamp rod 55 to ensure the stability of the structure. The first nut 60 is used to ensure the assembly of the first threaded fastener 59 and other structures.

[0043] The screw clamp assembly realizes the clamping of the hollow screw that needs to be assembled. In one embodiment, the screw clamp assembly includes a plurality of screw clamping rods 61, a second clamping elastic band 62, a second expansion plate 63, a second compression spring 64, a second threaded fastener 65 and a second nut 66. A plurality of screw clamp rods 61 are distributed on the screw clamp bracket 17 along the circumferential direction, and one end of the screw clamp rods 61 is hinged to the screw clamp bracket 17, and the second clamping elastic band 62 is sleeved on the outer side of the circular structure enclosed by the upper end of the screw clamp rod 61, and the diameter of the circular structure enclosed by the upper end of the screw clamp rod 61 is smaller than the diameter of the circular structure enclosed by the lower end of the screw clamp rod 61; a second adjustment section 610 is provided in the middle part of the screw clamp rod 61, and the second adjustment section 610 encloses a conical structure, the second expansion plate 63 is located in the conical structure formed by the second adjustment section 610 and abuts against the inner side of the second adjustment section 610, the second compression spring 64 is located between the second expansion plate 63 and the screw clamp bracket 17, and the second threaded fastener 65 passes through the second expansion plate 63, the second compression spring 64 and the screw clamp bracket 17 and is fixedly connected by the second nut 66.

[0044] In the above embodiment, the clamping principle of the screw clamp assembly on the screw is similar to the clamping principle of the aforementioned retaining frame clamp assembly on the retaining frame. The specific principle is: the hollow screw is mounted on the outside of the circular structure enclosed by the upper end of the screw clamp rod 61, that is, the screw clamp rod 61 abuts against the inner wall of the screw and maintains an outward stretching force to fix the hollow screw to the outside of the circular structure enclosed by the upper end of the screw clamp rod 61.

[0045] The degree to which the lead screw clamp rod 61 is stretched outward can be adjusted by adjusting the distance of the second expansion plate 63 relative to the lead screw clamp bracket 17. The principle is: when the second threaded fastener 65 is rotated, the distance of the second expansion plate 63 relative to the lead screw clamp bracket 17 changes. Since the second adjustment section 610 encloses a conical structure that is small at the top and large at the bottom, after the second expansion plate 63 abuts against the second adjustment section 610, the second expansion plate 63 will change the inclination of the lead screw clamp rod 61, thereby changing the degree to which the lead screw clamp rod 61 is stretched outward. The second compression spring 64 is used to ensure that the second expansion plate 63 is always in contact with the second adjustment section 610. The second clamping elastic band 62 is used to constrain the circular structure enclosed by the upper end of the lead screw clamp rod 61 to ensure the stability of the structure. The second nut 66 is used to ensure the assembly of the second threaded fastener 65 and other structures.

[0046] Reviewing the aforementioned assembly method, it can be known that the planetary roller screw assembly device can also drive the lifting and lowering of the fixture lifting platform 11 through the fixture lifting assembly, thereby realizing the adjustment of the overall height of the fixture mechanism. In one embodiment, the fixture lifting assembly includes a first motor 25, a lifting transmission shaft 26, a first main gear 27, a plurality of first sub-gears 28 and a plurality of first lifting screws 29; the first motor 25 is electrically connected to the controller. The first motor 25 is fixed on the frame 10, the lifting transmission shaft 26 is movably arranged on the frame 10, the lifting transmission shaft 26 is transmission-connected with the first motor 25, the first main gear 27 is fixed to one end of the lifting transmission shaft 26, and a plurality of first sub-gears 28 are all meshed with the first main gear 27, and the inner side of the first sub-gear 28 is provided with an internal thread, and each first sub-gear 28 is threadedly meshed with the corresponding first lifting screw 29 through the internal thread, and the top of the first lifting screw 29 is movably connected with the bottom of the fixture lifting platform 11.

[0047] In this embodiment, the principle of the clamp lifting assembly to adjust the overall height of the clamp mechanism is as follows: the controller drives the first motor 25 to start, and the forward or reverse rotation of the first motor 25 will drive the rotation of the lifting transmission shaft 26. The rotation of the lifting transmission shaft 26 is transmitted to the first main gear 27 through the first main gear 27 to a plurality of first sub-gears 28 located around the first main gear 27 and meshing with the first main gear 27. After the first sub-gear 28 rotates, since the first sub-gear 28 is threadedly meshed with the corresponding first lifting screw 29 through the internal thread, the first lifting threaded rod converts the rotational motion into linear motion, thereby driving the lifting motion of the clamp lifting platform 11 located on the top of the first lifting screw 29.

[0048] In a further embodiment, the first main bevel gear 30, the first drive transmission rod 31, the first sub-bevel gear 32, the first main sprocket 33, the first sub-sprocket 34 and the first chain 35 are further included. The first main bevel gear 30 is fixedly arranged at the output end of the first motor 25, the first drive transmission rod 31 is movably arranged on the frame 10, the first sub-bevel gear 32 is fixedly arranged at one end of the first drive transmission rod 31, the first main bevel gear 30 is meshed with the first sub-bevel gear 32, the first main sprocket 33 is arranged at the other end of the first drive transmission rod 31, the first sub-sprocket 34 is fixedly arranged at the bottom end of the lifting transmission shaft 26, and the first main sprocket 33 and the first sub-sprocket 34 are connected by the first chain 35.

[0049] Therefore, the first motor 25 can output the torque to the first driving transmission rod 31 through the engagement of the first main bevel gear 30 and the first sub-bevel gear 32, and then transmit the torque to the lifting transmission shaft 26 through the first main sprocket 33, the first sub-sprocket 34 and the first chain 35.

[0050] Reviewing the above assembly method, it can be known that the planetary roller screw assembly device can also drive the upper buckle lifting platform 13 to rise and fall through the upper buckle lifting assembly, thereby realizing the height adjustment of the buckle assembly located on the upper buckle lifting platform 13. In one embodiment, the upper buckle lifting assembly includes a second motor 36, a height adjustment transmission hollow wheel 37, a second main gear 38, a plurality of second sub-gears 39 and a plurality of second lifting screws 40; the second motor 36 is electrically connected to the controller. The second motor 36 is fixed on the frame 10, the height adjustment transmission hollow wheel 37 is sleeved on the outer side of the lifting transmission shaft 26, the lifting transmission shaft 26 is transmission-connected to the second motor 36, the second main gear 38 is fixed to one end of the height adjustment transmission hollow wheel 37, and a plurality of second sub-gears 39 are all meshed with the second main gear 38, and the inner side of the second sub-gear 39 is provided with an internal thread, and each second sub-gear 39 is threadedly meshed with the corresponding second lifting screw 40 through the internal thread, and the top of the second lifting screw 40 is movably connected to the bottom of the upper buckle lifting platform 13.

[0051] In this embodiment, the principle of the upper buckle lifting assembly driving the upper buckle lifting platform 13 to move is: the controller drives the second motor 36 to start, and the forward or reverse rotation of the second motor 36 will drive the rotation of the height adjustment transmission hollow wheel 37. The rotation of the height adjustment transmission hollow wheel 37 is transmitted to a plurality of second sub-gears 39 located around the second main gear 38 and meshing with the second main gear 38 through the second main gear 38. After the second sub-gear 39 rotates, since the second sub-gear 39 is threadedly meshed with the corresponding second lifting screw 40 through the internal thread, the second lifting threaded rod converts the rotational motion into linear motion, thereby driving the lifting motion of the upper buckle lifting platform 13 located at the top of the second lifting screw 40.

[0052] In a further embodiment, the second main bevel gear 41, the second drive transmission rod, the second sub-bevel gear 43, the second main sprocket, the second sub-sprocket 45 and the second chain are further included. The second main bevel gear 41 is fixedly arranged at the output end of the second motor 36, the second drive transmission rod is movably arranged on the frame 10, the second sub-bevel gear 43 is fixedly arranged at one end of the second drive transmission rod, the second main bevel gear 41 is meshed with the second sub-bevel gear 43, the second main sprocket is arranged at the other end of the second drive transmission rod, the second sub-sprocket 45 is fixedly arranged at the bottom of the height adjustment transmission hollow wheel 37, and the second main sprocket and the second sub-sprocket 45 are connected by the second chain transmission.

[0053] Thus, the second motor 36 can output the torque to the second driving transmission rod through the meshing of the second main bevel gear 41 and the second secondary bevel gear 43, and then transmit the torque to the height adjustment transmission hollow wheel 37 through the second main sprocket, the second secondary sprocket 45 and the second chain.

[0054] Looking back at the aforementioned assembly method, it can be seen that the roller needs to be clipped into the clip ring 20 located on the lower clip bracket 12 and the upper clip lifting platform 13 according to the calculated angle and length. The clip ring 20 has a certain elasticity based on its own shape and can be deformed. Therefore, relying on its own structure, it can ensure that the roller is firmly clipped in, and then use the controller to control the drive part of the clip telescopic drive assembly to match the roller with the screw.

[0055] Among them, the roller needs to be calculated according to the formula in Dong Yong's "Design Method and Virtual Assembly of Planetary Roller Screw Pair Rollers" for roller assembly angle calculation, which is excerpted as follows: β=n s θ(where is the angle between the rollers, N is the number of rollers, θ is the orbital angle of the rollers, n s is the number of screw threads, β is the roller rotation angle).

[0056] The buckle assembly includes a buckle wheel 18 and a buckle rod 19. A plurality of limiting notches are provided on the lower buckle bracket 12 and the upper buckle lifting platform 13. The buckle rod 19 is movably matched with the limiting notches. A gear rack is formed between the buckle wheel 18 and the buckle rod 19. An open snap ring 20 is fixedly provided on one side of the buckle rod 19. The roller is inserted into the buckle assembly through the open snap ring 20. The working principle of the telescopic movement of the buckle assembly is as follows: when the buckle wheel 18 is rotated, the gear rack formed between the buckle wheel 18 and the buckle rod 19 will convert the rotational movement of the buckle wheel 18 into the horizontal movement of the buckle rod 19, thereby realizing the horizontal movement of the inserted roller.

[0057] Based on the working principle of the telescopic movement of the above-mentioned buckle assembly, it can be known that the rotation of the buckle wheel 18 is used as the power for telescopic movement, and the rotation power of the buckle wheel 18 comes from the buckle telescopic drive assembly. The buckle telescopic drive assembly includes a driving part, a telescopic transmission main gear 21, a plurality of telescopic transmission sub-gears 22, a plurality of telescopic transmission rods 23 and a plurality of telescopic transmission sleeve rods 24. The driving part is connected to the telescopic transmission main gear 21 in transmission, the telescopic transmission main gear 21 is meshed with the telescopic transmission sub-gear 22, the inner side of the telescopic transmission sub-gear 22 is provided with an internal thread, the outer side of the telescopic transmission rod 23 is provided with an external thread, the telescopic transmission sub-gear 22 and the telescopic transmission rod 23 are meshed with each other through the internal thread and the external thread; the telescopic transmission sleeve rod 24 is sleeved with the telescopic transmission rod 23, the buckle wheel 18 located on the lower buckle bracket 12 is fixedly connected to the telescopic transmission rod 23, and the buckle wheel 18 located on the upper buckle lifting platform 13 is fixedly connected to the telescopic transmission sleeve rod 24.

[0058] In the above embodiment, the working principle of the snap-on telescopic drive assembly is as follows: the controller controls the drive unit to start, and the drive unit drives the telescopic transmission main gear 21 to rotate. Since the telescopic transmission main gear 21 is meshed with the telescopic transmission sub-gear 22, the telescopic transmission sub-gear 22 can be driven to rotate. Since the telescopic transmission sub-gear 22 and the telescopic transmission rod 23 are meshed with each other through internal and external threads, the rotation of the telescopic transmission sub-gear 22 is transmitted to the telescopic transmission rod 23 and the telescopic transmission sleeve rod 24, thereby driving the snap wheel 18 fixedly connected to the telescopic transmission rod 23 to rotate, and driving the snap wheel 18 fixedly connected to the telescopic transmission sleeve rod 24 to rotate.

[0059] In combination with the above-mentioned embodiments, since the height of the snap wheel 18 located on the upper snap lifting platform 13 will change, in order to adapt to the height change, this embodiment utilizes the sleeve cooperation of the telescopic transmission sleeve 24 and the telescopic transmission rod 23. When the height changes, the sleeve depth of the telescopic transmission sleeve 24 will decrease, thereby adapting to the height change. The transmission of rotational motion between the telescopic transmission sleeve 24 and the telescopic transmission rod 23 can be achieved through a simple structure, for example, a long groove is provided on the inner wall of the telescopic transmission sleeve 24, and a protrusion similar to a flat key is provided on the outer wall of the slot telescopic transmission rod 23, and the torque is transmitted through the cooperation of the long groove and the protrusion. Similarly, a long strip protrusion similar to a flat key can also be provided on the inner wall of the telescopic transmission sleeve 24, and a long groove is provided on the outer wall of the slot telescopic transmission rod 23, and the torque is transmitted through the cooperation of the long groove and the protrusion. These structures can still play a role when the sleeve depth of the telescopic transmission sleeve 24 changes.

[0060] On the basis of the implementation method of the above-mentioned snap-on telescopic drive assembly, further improvements can be made as follows: the drive unit includes a third motor 47 and a telescopic transmission hollow wheel 48; the third motor 47 is electrically connected to the controller; the third motor 47 is fixedly mounted on the frame 10, the telescopic transmission hollow wheel 48 is sleeved on the outer side of the height adjustment transmission hollow wheel 37, the third motor 47 and the telescopic transmission hollow wheel 48 are transmission-connected, and the telescopic transmission main gear 21 is fixedly arranged on one end of the telescopic transmission hollow wheel 48.

[0061] The above embodiment further proposes a feasible scheme for the driving part, and its principle is: the controller controls the third motor 47 to start, and the third motor 47 transmits the torque to the telescopic transmission hollow wheel 48. The telescopic transmission hollow wheel 48 rotates to drive the rotation of the telescopic transmission main gear 21, which can ultimately drive the snap wheel 18 fixedly connected to the telescopic transmission rod 23 to rotate, and drive the snap wheel 18 fixedly connected to the telescopic transmission sleeve rod 24 to rotate.

[0062] In a further embodiment, the third main bevel gear 49, the third driving transmission rod 50, the third sub-bevel gear 51, the third main sprocket 52, the third sub-sprocket 53 and the third chain 54 are further included. The third main bevel gear 49 is fixedly arranged at the output end of the third motor 47, the third driving transmission rod 50 is movably arranged on the frame 10, the third sub-bevel gear 51 is fixedly arranged at one end of the third driving transmission rod 50, the third main bevel gear 49 is meshed with the third sub-bevel gear 51, the third main sprocket 52 is arranged at the other end of the third driving transmission rod 50, the third sub-sprocket 53 is fixedly arranged at the bottom of the height adjustment transmission hollow wheel 37, and the third main sprocket 52 and the third sub-sprocket 53 are connected by the third chain 54.

[0063] On the basis of the feasible scheme of the aforementioned driving part, this embodiment proposes a power transmission method between the third motor 47 and the telescopic transmission hollow wheel 48, the principle of which is: the third motor 47 can output the torque to the third driving transmission rod 50 through the engagement of the third main bevel gear 49 and the third sub-bevel gear 51, and then transmit the torque to the telescopic transmission hollow wheel 48 through the third main sprocket 52, the third sub-sprocket 53 and the third chain 54.

[0064] Combining all the aforementioned embodiments, it can be seen that the lifting transmission shaft 26, the height adjustment transmission hollow wheel 37 and the telescopic transmission hollow wheel 48 are sequentially connected from the inside to the outside, avoiding mutual interference during power transmission and reducing the overall volume to a certain extent.

[0065] For all the aforementioned embodiments, the snap-on assembly can be configured according to the specifications and models of the planetary roller screw to be assembled, specifically according to the number of rollers in the product. The number of clamp lifting assemblies, upper snap-on lifting assemblies and snap-on telescopic drive assemblies that are compatible with the snap-on assembly, or the number of internal related structures, should also be set according to the actual product.

[0066] The present invention and its embodiments are described schematically above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and creatively designs a structure and an embodiment similar to the technical solution without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A planetary roller screw assembly device, characterized in that: It comprises a frame (10), a fixture lifting assembly, a fixture lifting platform (11), a fixture mechanism, a plurality of buckle assemblies, a lower buckle bracket (12), an upper buckle lifting platform (13), an upper buckle lifting assembly, a buckle telescopic drive assembly and a controller; The clamp lifting assembly is used to drive the clamp lifting platform (11) to rise and fall, and the upper buckle lifting assembly is used to drive the upper buckle lifting platform (13) to rise and fall; the upper buckle lifting platform (13) is located on the upper side of the frame (10), the lower buckle bracket (12) is located between the frame (10) and the upper buckle lifting platform (13), and the lower buckle bracket (12) is fixedly connected to the frame (10); The clamp mechanism comprises a clamp threaded platform (14), a clamp rotating platform (15), an inner bracket (16), a retaining frame clamp assembly, a screw clamp bracket (17) and a screw clamp assembly; an assembly cavity (110) is provided on the upper side of the clamp lifting platform (11), the clamp threaded platform (14) is located in the assembly cavity (110), and the circumferential outer wall of the clamp threaded platform (14) is threadedly matched with the circumferential inner wall of the assembly cavity (110); the inner bracket (16) is arranged on the clamp threaded platform (14), and the middle part of the inner bracket (16) protrudes to one side to form a connecting seat (160), and the The connecting seat (160) passes through the center of the clamp lifting platform (11) and the clamp rotating platform (15); the clamp rotating platform (15) is annular, the inner annular surface of the clamp rotating platform (15) is movably matched with the circumferential outer side of the inner bracket (16), and the outer annular surface of the clamp rotating platform (15) is in contact with the inner side wall of the clamp threaded platform (14); the lead screw clamp bracket (17) is fixed on the clamp lifting platform (11), the lead screw clamp assembly is arranged on the lead screw clamp bracket (17), and the retaining frame clamp assembly is arranged on the clamp rotating platform (15) and the inner bracket (16); The buckle assembly is located on the lower buckle bracket (12) and the upper buckle lifting platform (13), and comprises a buckle wheel (18) and a buckle rod (19). The lower buckle bracket (12) and the upper buckle lifting platform (13) are provided with a plurality of limiting notches, the buckle rod (19) is movably matched with the limiting notches, a gear rack is formed between the buckle wheel (18) and the buckle rod (19), and an open buckle ring (20) is fixedly provided on one side of the buckle rod (19); The snap-on telescopic drive assembly comprises a drive unit, a telescopic transmission main gear (21), a plurality of telescopic transmission sub-gears (22), a plurality of telescopic transmission rods (23) and a plurality of telescopic transmission sleeve rods (24); the drive unit is transmission-connected with the telescopic transmission main gear (21); the telescopic transmission main gear (21) is meshed with the telescopic transmission sub-gear (22); an internal thread is provided on the inner side of the telescopic transmission sub-gear (22); an external thread is provided on the outer side of the telescopic transmission rod (23); the telescopic transmission sub-gear (22) and the telescopic transmission rod (23) are meshed with each other through the internal thread and the external thread; the telescopic transmission sleeve rod (24) is sleeved with the telescopic transmission rod (23); a snap-on wheel (18) located on the lower snap-on bracket (12) is fixedly connected with the telescopic transmission rod (23); and a snap-on wheel (18) located on the upper snap-on lifting platform (13) is fixedly connected with the telescopic transmission sleeve rod (24); The clamp lifting assembly, the upper buckle lifting assembly and the driving unit are all electrically connected to the controller.

2. A planetary roller screw assembly device according to claim 1, characterized in that: The clamp lifting assembly comprises a first motor (25), a lifting transmission shaft (26), a first main gear (27), a plurality of first sub-gears (28) and a plurality of first lifting screws (29); the first motor (25) is electrically connected to the controller; The first motor (25) is fixed on the frame (10), the lifting transmission shaft (26) is movably arranged on the frame (10), the lifting transmission shaft (26) is drivingly connected to the first motor (25), the first main gear (27) is fixed to one end of the lifting transmission shaft (26), a plurality of the first sub-gears (28) are all meshed with the first main gear (27), the first sub-gear (28) is provided with an internal thread on the inner side, each of the first sub-gears (28) is threadedly meshed with the corresponding first lifting screw (29) through the internal thread, and the top of the first lifting screw (29) is movably connected to the bottom of the clamp lifting platform (11).

3. A planetary roller screw assembly device according to claim 2, characterized in that: It also includes a first main bevel gear (30), a first drive transmission rod (31), a first secondary bevel gear (32), a first main sprocket (33), a first secondary sprocket (34) and a first chain (35); The first main bevel gear (30) is fixedly arranged at the output end of the first motor (25), the first driving transmission rod (31) is movably arranged on the frame (10), the first sub-bevel gear (32) is fixedly arranged at one end of the first driving transmission rod (31), the first main bevel gear (30) is meshed with the first sub-bevel gear (32), the first main sprocket (33) is arranged at the other end of the first driving transmission rod (31), the first sub-sprocket (34) is fixedly arranged at the bottom end of the lifting transmission shaft (26), and the first main sprocket (33) and the first sub-sprocket (34) are connected in transmission via the first chain (35).

4. A planetary roller screw assembly device according to claim 2, characterized in that: The upper buckle lifting assembly comprises a second motor (36), a height adjustment transmission hollow wheel (37), a second main gear (38), a plurality of second sub-gears (39) and a plurality of second lifting screws (40); the second motor (36) is electrically connected to the controller; The second motor (36) is fixed on the frame (10); the height adjustment transmission hollow wheel (37) is sleeved on the outer side of the lifting transmission shaft (26); the lifting transmission shaft (26) is transmission-connected to the second motor (36); the second main gear (38) is fixed to one end of the height adjustment transmission hollow wheel (37); a plurality of second sub-gears (39) are meshed with the second main gear (38); an internal thread is provided on the inner side of the second sub-gear (39); each second sub-gear (39) is thread-meshed with the corresponding second lifting screw (40) through the internal thread; the top of the second lifting screw (40) is movably connected to the bottom of the upper buckle lifting platform (13).

5. A planetary roller screw assembly device according to claim 4, characterized in that: It also includes a second main bevel gear (41), a second drive transmission rod, a second secondary bevel gear (43), a second main sprocket, a second secondary sprocket (45) and a second chain; The second main bevel gear (41) is fixedly arranged at the output end of the second motor (36); the second drive transmission rod is movably arranged on the frame (10); the second secondary bevel gear (43) is fixedly arranged at one end of the second drive transmission rod; the second main bevel gear (41) is meshed with the second secondary bevel gear (43); the second main sprocket is arranged at the other end of the second drive transmission rod; the second secondary sprocket (45) is fixedly arranged at the bottom of the height adjustment transmission hollow wheel (37); and the second main sprocket and the second secondary sprocket (45) are connected through the second chain transmission.

6. A planetary roller screw assembly device according to claim 4, characterized in that: The driving part comprises a third motor (47) and a telescopic transmission hollow wheel (48); the third motor (47) is electrically connected to the controller; the third motor (47) is fixedly mounted on the frame (10); the telescopic transmission hollow wheel (48) is sleeved on the outer side of the height adjustment transmission hollow wheel (37); the third motor (47) and the telescopic transmission hollow wheel (48) are transmission-connected; and the telescopic transmission main gear (21) is fixedly mounted on one end of the telescopic transmission hollow wheel (48).

7. A planetary roller screw assembly device according to claim 6, characterized in that: It also includes a third main bevel gear (49), a third driving transmission rod (50), a third secondary bevel gear (51), a third main sprocket (52), a third secondary sprocket (53) and a third chain (54); The third main bevel gear (49) is fixedly arranged at the output end of the third motor (47); the third driving transmission rod (50) is movably arranged on the frame (10); the third sub-bevel gear (51) is fixedly arranged at one end of the third driving transmission rod (50); the third main bevel gear (49) is meshed with the third sub-bevel gear (51); the third main sprocket (52) is arranged at the other end of the third driving transmission rod (50); the third sub-sprocket (53) is fixedly arranged at the bottom of the height adjustment transmission hollow wheel (37); the third main sprocket (52) and the third sub-sprocket (53) are connected in transmission via the third chain (54).

8. A planetary roller screw assembly device according to claim 1, characterized in that: The retainer clamp assembly comprises a plurality of retainer clamp rods (55), a first clamping elastic band (56), a first expansion plate (57), a first compression spring (58), a first threaded fastener (59) and a first nut (60); A plurality of the retainer clamping rods (55) are distributed on the fixture rotating platform (15) along the circumferential direction, and one end of each of the retainer clamping rods (55) is hinged to the rotating platform. The first clamping elastic band (56) is sleeved on the outer side of the circular structure enclosed by the upper end of the retainer clamping rod (55). The diameter of the circular structure enclosed by the upper end of the retainer clamping rod (55) is smaller than the diameter of the circular structure enclosed by the lower end of the retainer clamping rod (55). A first adjusting section (550) is provided in the middle of the retainer clamping rod (55). The first adjustment section (550) is enclosed to form a conical structure that is small at the top and large at the bottom. The first expansion plate (57) is located in the conical structure formed by the first adjustment section (550) and abuts against the inner side of the first adjustment section (550). The first compression spring (58) is located between the first expansion plate (57) and the inner bracket (16). The first threaded fastener (59) passes through the first expansion plate (57), the first compression spring (58) and the inner bracket (16) and is fixedly connected by the first nut (60).

9. A planetary roller screw assembly device according to claim 1, characterized in that: The screw clamp assembly comprises a plurality of screw clamp rods (61), a second clamping elastic band (62), a second expansion plate (63), a second compression spring (64), a second threaded fastener (65) and a second nut (66); A plurality of the screw clamping rods (61) are distributed on the screw clamp bracket (17) along the circumferential direction, and one end of each of the screw clamping rods (61) is hinged to the screw clamp bracket (17); the second clamping elastic band (62) is sleeved on the outer side of the circular structure formed by the upper end of the screw clamping rod (61); the diameter of the circular structure formed by the upper end of the screw clamping rod (61) is smaller than the diameter of the circular structure formed by the lower end of the screw clamping rod (61); a second adjustment section (610) is provided in the middle of the screw clamping rod (61); The second adjustment section (610) is enclosed to form a conical structure that is smaller at the top and larger at the bottom. The second expansion plate (63) is located in the conical structure formed by the second adjustment section (610) and abuts against the inner side of the second adjustment section (610). The second compression spring (64) is located between the second expansion plate (63) and the screw clamp bracket (17). The second threaded fastener (65) passes through the second expansion plate (63), the second compression spring (64) and the screw clamp bracket (17) and is fixedly connected by the second nut (66).

10. An assembly method, comprising a planetary roller screw assembly device according to any one of claims 1 to 9, characterized in that: include: Fixing the retainer on the retainer clamp assembly, fixing the lead screw on the lead screw clamp assembly, rotating the clamp threaded platform (14) to adjust the height of the retainer clamp assembly so that the retainer is located below the plane of the lead screw end; According to the actual length of the roller and the lead screw, the controller is used to control the clamp lifting assembly to adjust the height of the clamp mechanism, and the controller is used to control the upper buckle lifting assembly to adjust the height of the buckle assembly located on the upper buckle lifting platform (13); The roller is clamped into the clamping ring (20) located on the lower clamping bracket (12) and the upper clamping lifting platform (13) according to the calculated angle and length; The controller is used to control the driving part of the buckle telescopic driving assembly to match the roller with the lead screw; Rotating the fixture threaded platform (14) to adjust the height of the retainer fixture assembly so that the retainer matches the lead screw and the roller; Using the controller to control the driving part of the buckle telescopic driving assembly to retract the buckle ring (20); The controller is used to control the clamp lifting assembly to adjust the height of the clamp mechanism, lift the assembly, screw in the lead screw nut, loosen the retaining frame clamp assembly and the lead screw clamp assembly, and install the retaining frame retaining ring so that the entire planetary roller screw pair is successfully installed.

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