Reverse planetary screw rod module

Abstract

The utility model is suitable for the technical field of reverse planetary screw rod modules, and provides a reverse planetary screw rod module which comprises a driving mechanism, the output end of the driving mechanism is connected with a nut, the axis of the nut is provided with a screw rod shaft, the screw rod shaft is provided with a screw rod thread, the outer wall of the screw rod thread is provided with a plurality of sets of planetary pin rollers in a surrounding mode, and the planetary pin rollers are arranged on the outer wall of the screw rod thread. The two ends of the screw rod thread are each provided with a centering gear, the two centering gears are fixedly connected with the screw rod shaft, the two centering gears are provided with planetary roller set end covers away from the screw rod thread, and the planetary roller set end covers are rotationally connected with the centering gears. Wherein the planetary pin roller comprises a pin roller body, pin roller threads are arranged on the outer wall of the pin roller body, the pin roller threads are spirally arranged in the axis direction of the pin roller body, and the two ends of the pin roller body are each provided with a set of planetary gears. The device solves the problem that the roller strength is reduced due to device stroke expansion, and achieves the effect of expanding the moving stroke while ensuring the overall strength of the device.

Description

TECHNICAL FIELD

[0001] The utility model relates to anti -planet screw rod module technical field more specifically, it relates to a kind of anti -planet screw rod module. BACKGROUND

[0002] Anti -planet screw rod module is a kind of high-precision, high-load mechanical transmission device, and its core structure includes nut, screw rod and planetary roller.As key transmission component, planetary roller has multiple threads and gear structure, and movement control is realized by meshing with screw rod.However, due to the length of planetary roller is usually longer, the moving stroke of module is affected.

[0003] At present, in order to solve the problem of stroke limitation, the common technical means is to shorten the length of thread on planetary roller and the height of gear to increase the effective stroke.This method can extend the moving stroke of module to some extent, but it also weakens the structural strength of planetary roller.The reduction of thread and gear height will lead to the reduction of meshing contact area, thereby reducing the carrying capacity and transmission efficiency of module, and even may cause problems such as accelerated wear and shortened life.

[0004] Therefore, an anti -planet screw rod module is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] In view of the deficiencies in the prior art, the utility model aims to provide an anti -planet screw rod module which can ensure the overall strength of the device and expand the moving stroke.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] An anti -planet screw rod module, comprising a driving mechanism, the output end of the driving mechanism is connected with a nut, the nut axis is provided with a screw rod shaft, the screw rod shaft has screw rod thread, the outer wall of the screw rod thread is provided with a plurality of planetary rollers, one set of centering gear is arranged at both ends of the screw rod thread, the two sets of centering gears are fixedly connected with the screw rod shaft, and the two sets of centering gears are provided with planetary roller set end covers away from the screw rod thread, and the planetary roller set end covers are rotatably connected with the centering gears;Wherein, the planetary roller comprises a roller body, the outer wall of the roller body is provided with a roller thread, the roller thread is spirally arranged along the roller body axis direction, one set of planetary gear is arranged at both ends of the roller body, the outer wall of the planetary gear is provided with a thread groove, and the thread groove is spirally arranged along the roller body axis direction.

[0008] By adopting the above technical scheme, the planetary gear and the thread groove provided thereon ensure the strength of the planetary roller while reducing the overall length of the planetary roller, save space, and the stroke is longer.

[0009] The utility model further sets up: the spiral direction of threaded groove and threaded groove is identical, the outer wall diameter of planetary gear is not bigger than the outer wall diameter of threaded groove, the connecting column is arranged to the side of threaded groove of planetary gear.

[0010] Through adopting the above technical scheme, the threaded groove can avoid engaging with the internal thread and the centering gear, and can also assist the planetary roller in engaging with the internal thread, so that the planetary roller revolves around the screw shaft while the planetary roller rotates, and the effect of one thing serving multiple purposes is achieved.

[0011] The utility model further sets up: multiple planetary gears are engaged with two centering gears, and multiple connecting columns are inserted into two planetary roller group end covers.

[0012] The utility model further sets up: the nut is hollow cylindrical structure, the inner wall of nut is provided with internal thread, the internal thread is spirally arranged along the nut axis direction, and the diameter of the planetary roller group end cover is smaller than the diameter of the inner wall of the nut.

[0013] The utility model further sets up: the internal thread is engaged with multiple threaded rollers, and the spiral direction of the internal thread and the threaded roller is identical.

[0014] The utility model further sets up: the screw thread is spirally arranged along the screw shaft axis direction, the screw thread is engaged with multiple threaded rollers, and the spiral direction of the screw thread and the threaded roller is opposite.

[0015] In conclusion, the present application has at least one of the following beneficial technical effects:

[0016] 1. The planetary gear and the threaded groove formed in the planetary gear ensure the strength of the planetary roller while reducing the overall length of the planetary roller, saving space and increasing the stroke.

[0017] 2. The threaded groove can avoid engaging with the internal thread and the centering gear, and can also assist the planetary roller in engaging with the internal thread, so that the planetary roller revolves around the screw shaft while the planetary roller rotates, and the effect of one thing serving multiple purposes is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the reverse planetary screw module.

[0019] Figure 2 It is Figure 1 It is a sectional view in the A-A cutting direction.

[0020] Figure 3 It is an explosion schematic view of the utility model.

[0021] Figure 4The utility model discloses a planetary roller's structure schematic view.

[0022] Signification of reference number: 1, drive mechanism;

[0023] 2, nut;21, internal thread;

[0024] 3, screw shaft;31, screw thread;

[0025] 4, planetary roller;41, roller body;42, roller thread;43, planetary gear;44, thread groove;45, connecting column;

[0026] 5, centering gear;

[0027] 6, planetary roller group end cover. DETAILED DESCRIPTION

[0028] It needs to be explained that the embodiment in the application and the feature in the embodiment can be combined mutually in the case of no conflict.

[0029] It needs to be pointed out that all technical and scientific terms used in the application have the same meaning with the person of ordinary skill in the art of the application, unless otherwise indicated.

[0030] Embodiment, please refer to Figures 1-4 The utility model provides the following technical schemes:

[0031] Specifically refers to a kind of reverse planetary screw module, refer to Figures 1-3, including driving mechanism 1, driving mechanism 1 is used for providing rotating power, driving mechanism 1 can be motor or rotating cylinder mechanism, the output end of driving mechanism 1 is fixed chassis, the output end of driving mechanism 1 is connected with nut 2, i.e. the fixed chassis of driving mechanism 1 is connected with nut 2, the outer wall diameter of nut 2 is 49mm, nut 2 is used to block dust or debris from entering the inside damage component, the axis of nut 2 is provided with screw rod shaft 3, screw rod shaft 3 has the mechanism for limiting its rotation, so that screw rod shaft 3 is as the output of device, realizes up and down movement, screw rod shaft 3 has screw thread 31, screw thread 31 is responsible for transmitting kinetic energy, the outer wall of screw rod shaft 3 away from screw thread 31 side adopts carbon fiber surface plating process, so that its surface has carbon fiber layer, the outer wall diameter of screw thread 31 is 25mm, a plurality of planetary rollers 4 are provided around the outer wall of screw thread 31, planetary roller 4 is used to rotate around screw thread 31 and provide upward driving force for screw rod shaft 3, the axis direction of planetary roller 4 is length direction, the length of planetary roller 4 is 55mm, a set of center gears 5 are arranged at both ends of screw thread 31, two sets of center gears 5 are fixedly connected with screw rod shaft 3, two sets of center gears 5 are provided with planetary roller group end cover 6 away from screw thread 31, planetary roller group end cover 6 is used to limit the position of a plurality of planetary rollers 4, so that it runs in the specified position, planetary roller group end cover 6 is rotatably connected with center gear 5.

[0032] Refer to Figure 4 , planetary roller 4 includes roller body 41, roller body 41 outer wall is provided with roller thread 42, roller thread 42 is spirally arranged along the axis direction of roller body 41, a set of planetary gears 43 are arranged at both ends of roller body 41, the height of planetary gear 43 is 5mm, the outer wall of planetary gear 43 is provided with thread groove 44, thread groove 44 is spirally arranged along the axis direction of roller body 41. The spiral direction of roller thread 42 and thread groove 44 is consistent, the outer wall diameter of roller thread 42 is 12mm, the outer wall diameter of planetary gear 43 is not greater than the outer wall diameter of roller thread 42, connecting column 45 is arranged on the side of planetary gear 43 away from roller thread 42. A plurality of planetary gears 43 are meshingly connected with two sets of center gears 5, a plurality of connecting columns 45 are inserted with two sets of planetary roller group end covers 6. The outer wall of nut 2 adopts carbon fiber surface plating process, so that its surface has carbon fiber layer, nut 2 is hollow cylindrical structure, the inner wall of nut 2 is provided with internal thread 21, internal thread 21 is spirally arranged along the axis direction of nut 2, the diameter of planetary roller group end cover 6 is less than the inner wall diameter of nut 2. Internal thread 21 is meshingly connected with a plurality of roller threads 42, and the spiral direction of internal thread 21 and roller thread 42 is consistent. Screw thread 31 is spirally arranged along the axis direction of screw rod shaft 3, screw thread 31 is meshingly connected with a plurality of roller threads 42, and the spiral direction of screw thread 31 and roller thread 42 is opposite.

[0033] Through the planet gear 43 and the thread groove 44 opened on it, it can mesh with the centering gear 5 and also can mesh with the internal thread 21, meshing with the internal thread 21 assists the rotation of the planet roller 4, namely the rotation of the planet roller 4, meshing with the centering gear 5 makes the multiple groups of planet rollers 4 revolve around the screw shaft 3, namely the revolution of the planet rollers 4, through the planet gear 43 and the thread groove 44, two functions are realized, the effect of one thing with multiple uses is achieved, meanwhile, the length of the planet roller 4 is reduced, the space is saved, the planet roller 4 and the screw shaft 3 can move a longer distance, so that a longer stroke is obtained.

[0034] When in use, the driving mechanism 1 is started to drive the nut 2 to rotate, the screw shaft 3 cannot rotate due to the limitation of the external mechanism, the roller body 41 meshes with the internal thread 21 and the screw thread 31, the rotation of the internal thread 21 makes the roller body 41 rotate, at the same time, the planet gear 43 meshes with the centering gear 5, the centering gear 5 cannot rotate, so that the planet roller 4 revolves around the centering gear 5, thereby making the multiple groups of planet rollers 4 in the nut 2 rotate around the screw shaft 3, the screw shaft 3 moves up and down under the influence of the thread.

[0035] Obviously, the above described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

Claims

1. A counter planetary lead screw module, characterized by: The utility model provides a drive mechanism (1), the output of drive mechanism (1) is connected with nut (2), the axle of nut (2) is provided with screw rod axle (3), screw rod axle (3) has screw rod thread (31), the outer wall of screw rod thread (31) is provided with a plurality of planetary roller (4) around, both ends of screw rod thread (31) are provided with a set of centering gear (5), two sets of centering gear (5) are fixedly connected with screw rod axle (3), and two sets of centering gear (5) are provided with planetary roller group end cover (6) away from screw rod thread (31), planetary roller group end cover (6) is rotatably connected with centering gear (5); Wherein, the planetary roller (4) includes a roller body (41), the outer wall of the roller body (41) is provided with a roller thread (42), the roller thread (42) is helically arranged along the axis direction of the roller body (41), and a set of planetary gears (43) is arranged at both ends of the roller body (41). The outer wall of the planetary gear (43) is provided with a threaded groove (44), and the threaded groove (44) is helically arranged along the axis direction of the roller body (41).

2. The counter-planetary lead screw module according to claim 1, wherein: The spiral direction of the roller thread (42) and the threaded groove (44) is consistent, the outer wall diameter of the planetary gear (43) is not greater than the outer wall diameter of the roller thread (42), and the connection column (45) is arranged on the side of the planetary gear (43) away from the roller thread (42).

3. The counter-planetary lead screw module of claim 2, wherein: A plurality of planetary gears (43) are meshed with two sets of centering gears (5), and a plurality of connection columns (45) are inserted into two sets of planetary roller group end covers (6).

4. The counter-planetary lead screw module of claim 1, wherein: The nut (2) is a hollow cylindrical structure, the inner wall of the nut (2) is provided with an internal thread (21), the internal thread (21) is helically arranged along the axis direction of the nut (2), and the diameter of the planetary roller group end cover (6) is less than the inner wall diameter of the nut (2).

5. The counter-planetary lead screw module of claim 4, wherein: The internal thread (21) is meshed with a plurality of roller threads (42), and the spiral direction of the internal thread (21) and the roller thread (42) is consistent.

6. The counter-planetary lead screw module of claim 1, wherein: The screw rod thread (31) is helically arranged along the axis direction of the screw rod axle (3), the screw rod thread (31) is meshed with a plurality of roller threads (42), and the spiral direction of the screw rod thread (31) and the roller thread (42) is opposite.

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