WO2020107150A1 - 行星螺杆及具有该行星螺杆的工具机 - Google Patents

行星螺杆及具有该行星螺杆的工具机 Download PDF

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Publication number
WO2020107150A1
WO2020107150A1 PCT/CN2018/117439 CN2018117439W WO2020107150A1 WO 2020107150 A1 WO2020107150 A1 WO 2020107150A1 CN 2018117439 W CN2018117439 W CN 2018117439W WO 2020107150 A1 WO2020107150 A1 WO 2020107150A1
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WIPO (PCT)
Prior art keywords
nut
planetary
external thread
main screw
screw according
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Application number
PCT/CN2018/117439
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English (en)
French (fr)
Inventor
吴叁贵
Original Assignee
诠丰精密工具股份有限公司
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Priority to PCT/CN2018/117439 priority Critical patent/WO2020107150A1/zh
Publication of WO2020107150A1 publication Critical patent/WO2020107150A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members

Definitions

  • the present invention relates to a linear translation mechanism and a machine tool having the linear translation mechanism, in particular to a planetary screw for converting rotary motion into linear translation motion, or converting linear translation motion into rotary motion and having The planetary screw machine tool.
  • FIG. 1 is a conventional planetary screw 9
  • the planetary screw 9 is provided with a plurality of rollers 93 between a main screw 91 and a nut 92
  • the main screw 91 has an external thread 911
  • the nut 92 has an internal thread 921 and non-threaded 922 portions on both sides of the internal thread 921 section, the non-threaded 922 portion houses a collar 94, the collar 94 has internal ring teeth 941 and a fixed plate 95
  • the plurality of rollers 93 are the same as each other and have an external thread 931 and an external tooth portion 932, and two ends of the plurality of rollers 93 are respectively sleeved on two fixing plates 95, and the plurality of rollers 93 are at an equal angle
  • the intervals are distributed around the main screw 91 and are coaxial with the main screw 91.
  • the external threads 931 of the plurality of rollers 93 and the internal threads 921 of the nut 92 and the external threads 911 of the main screw 91 are engaged.
  • the outer teeth portion 932 of the roller 93 meshes with the inner ring teeth 941 of the collar 94, so that the nut 92 can move axially relative to the main screw 91, or the main screw 91 can perform relative to the nut 92 Axial movement.
  • an oil seal 951 is further provided between the two fixing plates 95 and the collar 94, and filled in the nut 92 and between the two fixing plates 95 Lubricating oil, and two end caps 96 are screwed onto the main screw 91, and the two end caps 96 close the two end edges of the nut 92 to prevent the lubricating oil from being lost.
  • the above-mentioned existing planetary studs 9 additionally process the external teeth on the plurality of rollers 93 Part 932, and processing the two non-threaded 922 parts in the nut 92 and accommodating the collar 94, and processing the inner ring teeth 941 in the collar 94, so that the structure of the existing planetary screw is complicated , And lead to the problem of increased processing costs.
  • the lubricating oil will still gradually drain through the external threads 911 and 931 of the main screw 91 and the plurality of rollers 93, resulting in noise when the planetary screw rotates, which requires frequent disassembly
  • the lubricating oil is filled in the nut 92 and between the two fixing plates 95, so that The filling of the lubricating oil becomes troublesome and difficult.
  • the machine tool of the present invention can be used to convert rotary motion into linear translation motion, or convert linear translation motion into rotary motion of various power transmission and output machines.
  • it can be a plastic molding machine, a stamping machine, a linear actuator, a 3D printer, etc.
  • an object of the present invention is to provide a planetary screw, which can simplify its structure and further reduce the processing cost.
  • the object of the present invention is to provide a planetary screw with a simple structure, and can be easily filled with lubricating oil, and further reduce the noise of the planetary screw when rotating.
  • An object of the present invention is to provide a machine tool having the planetary screw, which can be easily repaired and filled with lubricating oil, thereby further reducing the failure rate of the machine tool and the noise when the planetary screw rotates.
  • the planetary screw of the present invention includes: a main screw having an external thread and a connecting portion; a nut having a hole penetrating through both end surfaces of the nut, an inner wall surface forming the hole having an internal thread; and a
  • the planetary group has a support structure for supporting positioning and rotation of a plurality of rollers on the support structure, the plurality of rollers are identical to each other and have external threads, the external threads of the plurality of rollers and the external threads of the main screw and the nut Of the internal threads are engaged.
  • the planetary screw of the present invention is mainly in contact with the main screw and the nut through the support structure, and only through the external threads of the plurality of rollers and the external thread of the main screw and the nut Internal thread engagement enables the plurality of rollers to rotate and revolve relative to the main screw and nut, has a relatively simple structure as a whole and can reduce friction, so that the processing cost of the planetary screw can be greatly reduced, and Can improve production and assembly efficiency. Moreover, since the support structure does not directly contact the main screw and the nut, the effects of noise and the like formed when the planetary screw rotates can be reduced.
  • the inner wall surface is a stepped hole
  • the inner wall surface of the middle section has a first inner diameter
  • the inner wall surfaces at both end sides of the nut have a second inner diameter
  • the second inner diameter portion is an adhesion portion
  • the The inner diameter of the adhesion part is larger than the inner diameter of the first inner diameter
  • the inner thread is located at the first inner diameter.
  • the nut has at least one through hole penetrating the inner wall surface and the outer wall surface, each of the at least one through hole can be opened and closed by a plug member. In this way, it is possible to easily fill the nut with lubricating oil.
  • each of the two through holes can be connected to an oil guiding pipe. In this way, the lubricating oil can be filled into the nut cyclically.
  • the support structure is composed of two fixing plates and a plurality of fixing columns, the central parts of the two fixing plates each have a perforation and a plurality of assembly holes surrounding the perforation, the plurality of assembly holes Located on the circumference of the same radius with the center of the perforation as the center, the two ends of the plurality of fixing posts are respectively coupled to the assembly hole.
  • the support structure can firmly support the effect of positioning and rotating the plurality of rollers.
  • each of the plurality of fixing columns there is a coupling portion protruding from the two fixing plates, the coupling portion has an external thread, and each coupling portion is provided for screwing and fixing a coupling member with threads.
  • the plurality of fixed columns can be easily disassembled and combined, so that the support structure and the plurality of rollers can be conveniently maintained and replaced.
  • each external thread can be engaged with the external thread of the main screw and the internal thread of the nut, between each coupling member and the two fixed plates
  • Each has a gap, and each gap is slightly larger than the meshing gap between the external thread of each fixed column and the external thread of the main screw and the internal thread of the nut.
  • the plurality of fixing posts can also have the effect of rotation and revolution relative to the main screw and the nut.
  • the coupling member is sunk in the assembly hole. In this way, the coupling member has the effect of not protruding from the surface of the fixing plate.
  • the coupling piece protrudes from the outer surfaces of the two fixing plates and does not contact the nut. In this way, it is possible to prevent the coupling member from colliding with the nut and the effect that the fixing post can be easily removed.
  • each end of the plurality of rollers has an assembling portion, and each assembling portion can be passed through the two solid
  • the assembly hole of the fixed plate rotates movably. In this way, it is possible to ensure that the plurality of rollers are positioned between the two fixed plates to smoothly rotate.
  • the number of planet rollers between any two adjacent fixed columns is the same.
  • the plurality of fixed columns can evenly bear the frictional force of the plurality of rollers in revolving with the main screw and the nut, and has the effect of achieving a good balanced force.
  • the sealing portions at both ends of the nut each have a closure member, and the closure member is detachably coupled to the nut.
  • the closing member can seal the lubricating oil in the hole of the nut, so as to prevent the lubricating oil from leaking out, so as to improve the cleanliness of the working environment, and prevent external dust or foreign objects from falling into the screw space to avoid affecting the nut With the effect of smooth rotation of the main screw.
  • the closing member is made of an elastic material. In this way, the closing member has a better sealing effect, and the effect of preventing the leakage of lubricating oil can be avoided.
  • the closing member and the main screw are screwed together with threads, and the screw pitch or the screw shape of the closing member and the main screw are different. In this way, it can be ensured that the closing member can seal the lubricating oil in the hole of the nut, so as to avoid the effect of the lubricating oil leaking from the screwing portion of the closing member and the main screw.
  • the planetary screw of the present invention can be used in a machine tool, can be used to convert rotary motion into linear translational motion, or convert linear translational motion into rotary motion, and has the ability to easily maintain and repair the planetary screw Filled with lubricant and other effects.
  • FIG. 1 is a structural diagram of an existing planetary screw.
  • FIG. 2 is an exploded perspective view of the first preferred embodiment of the present invention.
  • FIG 3 is an exploded perspective view of the planetary set of the first preferred embodiment of the present invention.
  • FIG. 5 is an enlarged view of a partial structure of A shown in FIG. 4.
  • FIG. 6 is a structural view of the main screw and nut of the B part shown in FIG. 4.
  • FIG. 7 is a combined cross-sectional view of a second preferred embodiment of the present invention.
  • the "joint”, “combination” or “assembly” and other similar terms used throughout the present invention mainly include a type that can be separated without damaging the component after connection, or that the component cannot be separated after connection; for example, with a thread
  • the components are connected by screwing or welding, which is selected by those with ordinary knowledge in the art according to the material or assembly requirements of the components to be connected.
  • FIG. 2 is the first embodiment of the planetary screw of the present invention, which includes a main screw 1, a nut 2 and a planetary group 3, the planetary group 3 is located in the nut 2, and Surrounding the main screw 1 so that the main screw 1 can move linearly relative to the nut 2 and the planetary group 3 in the axial direction, or the nut 2 and the planetary group 3 can be axially relative to the The main screw 1 moves linearly.
  • the main screw 1 has an external thread 11, the external thread 11 may be located at one end of the main screw 1, the main screw 1 also has a connecting portion 12, the connecting portion 12 may be located at the other side of the main screw 1 At one end, the connecting portion 12 can be connected to a power device (not shown), so that the main screw 1 can be driven to rotate.
  • the nut 2 has a hole penetrating two end surfaces, the inner wall surface of the nut 2 forming the hole may be a single-diameter hole, or the inner wall surface may be a stepped hole that does not have the same diameter, in this embodiment
  • the inner wall surface is a stepped hole
  • the inner wall surface of the middle section has a first inner diameter 2a
  • the inner wall surfaces formed at both ends of the nut 2 have a second inner diameter 2b
  • the inner diameter size of the second inner diameter 2b is greater than
  • the inner diameter dimension of the first inner diameter 2a preferably, there is a third inner diameter 2c between the two second inner diameters 2b and the first inner diameter 2a, and the inner diameter dimension of each third inner diameter 2c is between the first inner diameter 2a And the inner diameter of the second inner diameter 2b.
  • the inner wall surface of the nut 2 forming the first inner diameter 2a has an internal thread 21, the inner wall surface of the nut 2 forming the second inner diameter 2b may be an adhesion portion 22, and the nut 2 forming the third inner diameter 2c
  • the inner wall surface may be a hollow portion 23.
  • the nut 2 preferably has at least one through hole 24 penetrating the inner wall surface and the outer wall surface, the Each at least one through hole 24 can be opened by a plug 25 so that the lubricating oil can be filled in the nut 2 through the at least one through hole 24.
  • each of the two through holes 24 may be connected to an oil guide pipe (not shown), so that the lubricating oil can
  • the through holes 24 form a circulation, which will have a better lubrication effect.
  • the planetary group 3 has a support structure, the support structure can support the positioning and rotation of a plurality of rollers 33, in this embodiment, the support structure consists of two A plurality of fixing posts 32 are formed between the fixing plates 31. Each central portion of the two fixing plates 31 has a through hole 311. The main screw 1 can pass through without contacting the two through holes 311. Each fixing plate 31 also has a plurality of assembly holes 312 surrounding the perforation 311, and the plurality of assembly holes 312 are looped on a circumference of the same radius centered on the perforation 311.
  • the plurality of fixing posts 32 may be respectively coupled to the two fixing plates 31 at both ends, so that the plurality of fixing posts 32 and the two fixing plates 31 may form a stable supporting structure together, the plurality of fixing posts 32 surrounds the outer periphery of the main screw 1 and does not contact the main screw 1 and the nut 2.
  • each of the two ends of each fixing post 32 has a coupling portion 321 protruding from the two fixing plates 31, and each protruding coupling portion 321 can be combined and fixed with a coupling member 322, in this embodiment
  • the coupling part 321 may have external threads
  • the coupling member 322 may be a nut
  • the coupling member 322 may be sunk in the assembly hole 312, or the coupling member 322 may protrude from the two fixing plates 31, the two fixing plates 31 and the protruding coupling member 322 may correspond to the third inner diameter 2c of the nut 2, and the two fixing plates 31 and the coupling member 322 are not connected to the third The inner diameter 2c is in contact.
  • Both ends of the plurality of rollers 33 each have an assembling portion 331, each of the two assembling portions 331 can be inserted into the assembly holes 312 of the two fixing plates 31 to rotate movably, The same and each having an external thread 332, and each external thread 332 can be engaged with the external thread 11 of the main screw 1 and the internal thread 21 of the nut 2, respectively, so that in the two fixing plates 31 and the When the plurality of fixing columns 32 are not in contact with the main screw 1 and the nut 2, each roller 33 can revolve and rotate relative to the main screw 1 and the nut 2.
  • the external thread 332 of the roller 33, the external thread 11 of the main screw 1 and the internal thread of the nut 2 may be the same single thread or multi-thread thread, in addition, the shape of the external thread 11 of the main screw 1 and The shape of the internal thread 21 of the nut 2 is preferably formed the same, and the shape of the external thread 332 of the roller 33 is preferably different from the shape of the external thread 11 of the main screw 1 and the shape of the internal thread 21 of the nut 2, as shown in FIG.
  • the external thread 11 of the main screw 1 The shape and the shape of the internal thread 21 of the nut 2 form a mountain shape, and the external thread 322 of the roller 33 forms an arc angle, so that the external thread 332 of the roller 33 and the external thread 11 of the main screw 1 can be reduced According to this, the frictional force between the two externally threaded portions 11, 332 can be reduced, which has the effects of reducing noise generation and improving smooth rotation.
  • the shape of the external thread 11 of the main screw 1 and the shape of the internal thread 21 of the nut 2 may be selected to form an arc angle, and the external thread 332 of the roller 33 may form a mountain shape
  • the form is not limited by the present invention.
  • the centers of the plurality of rollers 33 and the plurality of fixed columns 32 are preferably on the same radius circumference, and are arranged around the outer periphery of the main screw 1 at regular angles in a regular manner, and the plurality of rollers
  • the column 33 and the plurality of fixed columns 32 are preferably arranged in an integer ratio, so that any two adjacent fixed columns 32 have the same number of rollers 33.
  • the total number of the roller 33 and the fixed column 32 is nine, and the ratio of the number of the plurality of rollers 33 and the plurality of fixed columns 32 is 2:1, by which the The plurality of fixing columns 32 can evenly bear the frictional force of the plurality of rollers 33 revolving with the main screw 1 and the nut 2 to achieve a good balanced force.
  • the opposite end surfaces of the nut 2 in the axial direction also each have a closure member 4, and the closure member 4 is detachably coupled to the sealing portion of the nut 2 22.
  • the closing member 4 can seal the lubricating oil in the hole of the nut 2 to prevent the lubricating oil from leaking out, so as to improve the cleanliness of the working environment, and prevent external dust or foreign objects from falling into the screw space 31 to avoid The smoothness of the rotation of the nut 2 and the main screw 1 is affected.
  • a positioning component is inserted through the nut 2 to fix the closing member 4, so that the closing member 4 and the nut 2 can rotate synchronously, preferably, between the closing member 4 and the nut 2
  • a leakage stopper 34 to prevent the lubricant from leaking from the junction of the closure member 4 and the nut 2.
  • the closure member 4 has an extension hole 41 for the main screw 1 to extend, so that the main screw 1 can penetrate the interior of the nut 2 axially, the extension hole 41 can have an internal thread 42, the internal thread 42 and the The external thread 11 of the main screw 1 is screwed together.
  • the closing member 4 and the nut 2 can integrally move relative to the main screw 1 for use in a machine tool, for example: In a plastic injection molding machine, the closing member 4 and the nut 2 can be Positioning and rotating, the main screw 1 can be relatively linearly moved to eject the plastic from the nozzle; or, in other processing machines, the main screw 1 can be positioned to rotate, so that the closing member 4 and the nut 2 can Do relative axial displacement.
  • the seal 4 can also be made of elastic materials such as cassia gum, rubber, etc., so that the internal thread 42 of the seal 4 can be attached to the main screw 1 External thread 11 to avoid lubricant The rotation of the main screw 1 leaks out.
  • the pitch D1 of the internal thread 42 of the closure 4 may be different from the pitch D2 of the external thread 11 of the main screw 1; or the spiral shape of the internal thread 42 of the closure 4 may be different from that of the main screw 1
  • the screw shape of the external thread 11 is different; thereby, the internal thread 42 of the closing member 4 and the external thread 11 of the main screw 1 can further form a closer fit, and the material of the closing member 4 is elastic, also There is no undue hindrance to the rotation of the main screw 1, and it has an effect of improving the tightness of the closure 4 and the main screw 1.
  • FIG. 7 is the second embodiment of the planetary screw of the present invention.
  • the plurality of fixing posts 32 / each have an external thread 323 / and Same as each other, each external thread 323 / can be engaged with the external thread 11 of the main screw 1 and the internal thread 21 of the nut 2 respectively;
  • the plurality of fixing posts 32 / can extend through the two fixing plates 31 from both ends So that one joint portion 3 21 / of the plurality of fixing columns 32 / can protrude from the two fixing plates 31, and the two joint portions 32 r can each be joined by one joint member 3 2 2 / , the two joints
  • the portion 32r may be an external thread
  • each coupling member 322 / may be a nut, and each coupling member 322 / and the two fixing plates 31 each have a gap G that is slightly larger than the external thread 323 / and the the main screw and the external thread 11 of the nut 2 internal thread 21 of the engagement clearance, thus, may cause the pluralit
  • the binding 322 / sink may be provided with the hole 312 in the assembly, or the binding member 322 / may project to the outer surface of the two fixing plate 31 and the fixing plate 31 and the two projecting pieces 322 binding / Does not make contact with the third inner diameter 2c of the nut 2.
  • the main screw 1 when the planetary screw of the present invention operates, the main screw 1 can be driven to rotate, so that the plurality of rollers 33 engaged with the external thread 11 of the main screw 1 and the internal thread 21 of the nut 2 can It forms rotation and revolves around the main screw 1 together, so that when the nut 2 rotates in position, the main screw 1 can make relative linear movement, and the main screw 1 is rotated forward and reverse to make the main screw
  • the screw 1 can be repeatedly linearly moved; or when the main screw 1 rotates in position, the closing member 4 and the nut 2 can make relative axial displacements, and through the forward and reverse rotation of the main screw 1, the The closing member 4 and the nut 2 can be repeatedly moved linearly.
  • the planetary screw of the present invention is mainly not in contact with the main screw and the nut through the support structure, and only through the external threads of the plurality of rollers and the external thread of the main screw and the Internal thread of the nut
  • the plurality of rollers can rotate and revolve relative to the main screw and nut.
  • the whole has a relatively simple structure and can reduce friction. In this way, the processing cost of the planetary screw can be greatly reduced and can be improved. Production and assembly efficiency.
  • the support structure does not directly contact the main screw and the nut, the effects of noise and the like formed when the planetary screw rotates can be reduced.
  • effects such as easy maintenance and easy filling of lubricating oil can also be performed.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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Abstract

一种行星螺杆及具有该行星螺杆的工具机，该行星螺杆包括：一个主螺杆（1），具有一个外螺纹（11）及一个连接部（12）；一个螺母（2），具有一个贯穿该螺母（2）两端面的孔，形成该孔的内壁面具有一个内螺纹（21）；及一个行星组（3），具有一个支撑结构，用于支持多个滚柱（33）于该支撑结构定位旋转，该多个滚柱（33）彼此相同且具有外螺纹（332），多个滚柱（33）的外螺纹（332）与该主螺杆（1）的外螺纹（11）及该螺母（2）的内螺纹（21）相啮合。上述结构的行星螺杆能够解决现有的行星螺杆的构造复杂及旋转噪音的问题。

Description

行星螺杆及具有该行星螺杆的工具机 技术领域
[0001] 本发明涉及一种线性平移机构及具有该线性平移机构的工具机， 尤其涉及一种 用于将旋转运动转换为线性平移运动， 或将线性平移运动转换为旋转运动的行 星螺杆及具有该行星螺杆的工具机。
背景技术
[0002] 请参照图 1， 其为一种现有的行星螺杆 9， 该行星螺杆 9由一个主螺杆 91与一个 螺母 92间设有多个滚柱 93 , 该主螺杆 91具有一个外螺纹 911， 该螺母 92具有一个 内螺纹 921及在内螺纹 921段两侧的非螺纹 922部分， 该非螺纹 922部分容置一个 轴环 94， 该轴环 94内具有内环齿 941与一个固定板 95， 该多个滚柱 93彼此相同且 具有外螺纹 931及外齿部 932, 且该多个滚柱 93的两端分别套穿于两个固定板 95 ， 且该多个滚柱 93以等角间隔分布在该主螺杆 91周围， 及与该主螺杆 91同轴， 该多个滚柱 93的外螺纹 931和螺母 92的内螺纹 921及该主螺杆 91的外螺纹 911相啮 合， 该多个滚柱 93的外齿部 932与该轴环 94的内环齿 941相啮合， 使该螺母 92可 相对于该主螺杆 91进行轴向移动， 或使该主螺杆 91可相对于该螺母 92进行轴向 移动。
[0003] 此外， 为保持该行星螺柱 9旋转的顺畅， 于该两个固定板 95与该轴环 94间还设 有油封 951， 于该螺母 92内及该两个固定板 95之间充填润滑油， 且该主螺杆 91上 还螺合有两个端盖 96 , 该两个端盖 96封闭该螺母 92的两个端边， 以防止该润滑 油流失。
发明概述
技术问题
[0004] 上述现有的行星螺柱 9 , 为了确保该多个滚柱 93可以共同稳定地环绕该主螺杆 9 1周围及该螺母 92内旋转， 于该多个滚柱 93额外加工该外齿部 932， 及于该螺母 9 2内加工该两个非螺纹 922部分并容置该轴环 94， 及该轴环 94内加工该内环齿 941 ， 如此， 该现有的行星螺杆的构造复杂， 且导致加工成本增加的问题。 [0005] 此外， 该润滑油仍会循该主螺杆 91与该多个滚柱 93相螺合的该外螺纹 911、 931 部位逐渐流失， 导致该行星螺杆旋转时会产生噪音， 进而需频繁拆解该两个端 盖 96、 该两个固定板 95、 该轴环 94及该多个滚柱 93后， 再将该润滑油充填于该 螺母 92内及该两个固定板 95之间， 使该润滑油的充填变得麻烦与困难。
[0006] 有鉴于此， 5见有的行星螺杆确实仍有加以改善的必要。
问题的解决方案
技术解决方案
[0007] 本发明所述的工具机， 可用以将旋转运动转换为线性平移运动， 或将线性平移 运动转换为旋转运动的各种动力传递、 输出机械。 例如但不限制地可以为塑胶 成型机、 冲压机、 线性致动器、 3D列印机等。
[0008] 为解决上述问题， 本发明的目的在于提供一种行星螺杆， 可以简化其构造， 进 而可降低加工成本。
[0009] 本发明的目的在于提供一种行星螺杆， 具有简单构造， 且可以容易地进行润滑 油的充填， 进而可以降低该行星螺杆旋转时的噪音。
[0010] 本发明的目的在于提供一种具有该行星螺杆的工具机， 可容易地进行维修及充 填润滑油， 进而可以降低该工具机故障率及其行星螺杆旋转时的噪音。
[0011] 本发明的行星螺杆， 包括： 一个主螺杆， 具有一个外螺纹及一个连接部； 一个 螺母， 具有一个贯穿该螺母两端面的孔， 形成该孔的内壁面具有一个内螺纹； 及一个行星组， 具有一个支撑结构， 用于支持多个滚柱于该支撑结构定位旋转 ， 该多滚柱彼此相同且具有外螺纹， 多个滚柱的外螺纹与该主螺杆的外螺纹及 该螺母的内螺纹相啮合。
[0012] 据此， 本发明的行星螺杆， 主要通过该支撑结构与该主螺杆及该螺母成未接触 ， 及仅通过该多个滚柱的外螺纹与该主螺杆的外螺纹及该螺母的内螺纹啮合， 使该多个滚柱成可以相对于该主螺杆及螺母成自转及公转， 整体上具有较为简 单的构造及可以减少摩擦， 如此， 可大幅地降低该行星螺杆的加工成本， 及可 以提升生产及组装效率。 且由于该支撑结构未与该主螺杆及螺母直接接触， 进 而可以降低该行星螺杆旋转时所形成噪音等效果。 [0013] 其中， 该内壁面为阶梯型孔， 于中间段的内壁面具有一个第一内径， 在该螺母 两端边的内壁面具有第二内径， 该第二内径部位为密合部， 该密合部的内径尺 寸大于该第一内径的内径尺寸， 该内螺纹位于第一内径部位。 如此， 可以确保 该多个滚柱的外螺纹仅会与该螺母的内螺纹相啮合， 以避免该多个滚柱的外螺 纹碰撞该螺母的其他内壁面的效果。
[0014] 其中， 该螺母具有贯通该内壁面、 外壁面的至少一个通孔， 该至少一个通孔各 可以被一个塞件呈可开启的封闭。 如此， 可以方便地将润滑油充填至该螺母内 的效果。
[0015] 其中， 该通孔为两个， 且两个通孔各可以连接一个导油管。 如此， 可以使该润 滑油成循环地充填至该螺母内的效果。
[0016] 其中， 该支撑结构由两个固定板及多个固定柱所构成， 该两个固定板的中心部 位各具有一个穿孔及环绕于该穿孔周围的多个组装孔， 该多个组装孔位于以该 穿孔中心为圆心的同一半径的圆周上， 该多个固定柱的两端分别结合于该组装 孔。 如此， 该支撑结构可以稳固地支持该多个滚柱成定位旋转的效果。
[0017] 其中， 该多个固定柱的两端各具有一个凸出于该两个固定板的一个结合部， 该 结合部具有外螺纹， 各结合部供一个结合件以螺纹螺合固定。 如此， 该多个固 定柱具有可方便地拆解及结合， 使该支撑结构及多个滚柱可以方便地进行维修 及更换的效果。
[0018] 其中， 该多个固定柱各具有外螺纹且彼此相同， 各外螺纹分别可以与该主螺杆 的外螺纹及该螺母的内螺纹相啮合， 各结合件与该两个固定板之间各具有一个 间隙， 各间隙略大于各固定柱的该外螺纹与该主螺杆的外螺纹及该螺母的内螺 纹的啮合间隙。 如此， 该多个固定柱同样可以相对于该主螺杆及螺母成自转及 公转的效果。
[0019] 其中， 该结合件沉设于该组装孔。 如此， 该结合件具有不会凸出于该固定板表 面的效果。
[0020] 其中， 该结合件凸出于该两个固定板的外表面且不与该螺母接触。 如此， 可以 防止该结合件碰撞该螺母， 及该固定柱可以被方便卸除的效果。
[0021] 其中， 该多个滚柱的两端各具有一个组装部， 各组装部各可以穿设于该两个固 定板的组装孔成活动旋转。 如此， 可以确保该多个滚柱位于该两个固定板之间 成顺畅旋转的效果。
[0022] 其中， 任意两个相邻的固定柱之间的行星滚柱数量相同。 如此， 该多个固定柱 可以均匀的承受该多个滚柱与主螺杆及螺母进行公转的摩擦力， 具有可以达到 良好的平衡受力的效果。
[0023] 其中， 该螺母的两端的密合部各具有一个封闭件， 该封闭件成可拆解地结合于 该螺母。 如此， 该封闭件能够将润滑油封闭于该螺母的孔内， 以避免该润滑油 漏出， 以提升工作环境的整洁度， 并且防止外界的灰尘或异物掉入该螺转空间 ， 避免影响该螺母与该主螺杆的旋转顺畅度的效果。
[0024] 其中， 该封闭件由弹性材质制成。 如此， 该封闭件具有较佳地密封效果， 可以 避免润滑油漏出的效果。
[0025] 其中， 该封闭件与该主螺杆以螺纹相螺合， 该封闭件与该主螺杆的螺纹的螺距 或螺形不同。 如此， 可以确保该封闭件能够将润滑油封闭于该螺母的孔内， 可 以避免润滑油由该封闭件与该主螺杆的螺合部位漏出的效果。
[0026] 此外， 本发明的行星螺杆可以使用于一个工具机， 可用于将旋转运动转换为线 性平移运动， 或将线性平移运动转换为旋转运动， 且具有可以方便地对该行星 螺杆进行维修及填充润滑油等效果。
发明的有益效果
对附图的简要说明
附图说明
[0027] 图 1为一种现有的行星螺杆构造图。
[0028] 图 2为本发明第一较佳实施例的立体分解图。
[0029] 图 3为本发明第一较佳实施例的行星组的立体分解图。
[0030] 图 4为本发明第一较佳实施例的组合剖面图。
[0031] 图 5为如图 4所示的 A的局部构造放大图。
[0032] 图 6为如图 4所示的 B局部的主螺杆及螺母构造图。
[0033] 图 7为本发明第二较佳实施例的组合剖面图。
[0034] 附图标记说明 [0035] （本发明）
[0036] 1 主螺杆
[0037] 11 外螺纹 12 连接部
[0038] 2 螺母
[0039] 2a 第一内径 2b 第二内径
[0040] 2c 第三内径
[0041] 21 内螺纹 22 密合部
[0042] 23 透空部 24 通孔
[0043] 25 塞件 26 定位元件
[0044] 3 行星组
[0045] 31 固定板 311 穿孔
[0046] 312 组装孔 32. 32 / 固定柱
[0047] 321、 32 r 结合部 322、 322 ' 结合件
[0048] 323 / 外螺纹
[0049] 33 滚柱 331 组装部
[0050] 34 止漏件
[0051] 4 封闭件
[0052] 41 穿伸孔 42 内螺纹
[0053] G 间隙
[0054] （5见有技术）
[0055] 9 行星螺杆 91 主螺杆
[0056] 911 外螺纹 92 螺母
[0057] 921 内螺纹 922 非螺纹
[0058] 921 内螺纹 922 非螺纹
[0059] 93 滚柱 931 外螺纹
[0060] 932 外齿部 94 轴环
[0061] 95 固定板 951 油封
[0062] 96 端盖。 实施该发明的最佳实施例
本发明的最佳实施方式
[0063] 为使本发明的上述及其他目的、 特征及优点能更明显易懂， 下文特列举本发明 的较佳实施例， 并配合附图， 作详细说明如下：
[0064] 本发明全文所述方向性或其近似用语， 例如“前”、 “后”、 “左”、 “右”、 “上 （顶 ） ”、 “下 （底） ”、 “内”、 “外”、 “侧面”等， 主要是参考附图的方向， 各方向性 或其近似用语仅用以辅助说明及理解本发明的各实施例， 并非用以限制本发明
[0065] 本发明全文所述“结合”、 “组合”或“组装”等近似用语， 主要包含连接后仍可不 破坏构件地分离， 或是连接后使构件不可分离等型态； 例如以具有螺纹的组件 相螺合或焊接结合等连接方式， 为本领域中具有通常知识者可以依据欲相连的 构件材质或组装需求予以选择的。
[0066] 请参照图 2所示， 其为本发明的行星螺杆的第一实施例， 其包括一个主螺杆 1、 一个螺母 2及一个行星组 3 , 该行星组 3位于该螺母 2内， 并环绕于该主螺杆 1的周 围， 使该主螺杆 1可以于轴向上相对于该螺母 2及该行星组 3进行线性移动， 或使 该螺母 2及该行星组 3可以于轴向上相对于该主螺杆 1进行线性移动。
[0067] 该主螺杆 1具有一个外螺纹 11， 该外螺纹 11可以位于该主螺杆 1的一端， 该主螺 杆 1还具有的一个连接部 12, 该连接部 12可以位于该主螺杆 1的另一端， 该连接 部 12可以连接一个动力装置 （图未绘示） ， 使该主螺杆 1可以被驱动该旋转。
[0068] 该螺母 2具有一个贯穿两个端面的孔， 形成该孔的该螺母 2的内壁面可以成单一 直径的孔， 或该内壁面可以为不具有相同直径的阶梯型孔， 在本实施例中， 该 内壁面为阶梯型孔， 于中间段的内壁面具有一个第一内径 2a， 形成于该螺母 2两 端边的内壁面具有第二内径 2b， 该第二内径 2b的内径尺寸大于该第一内径 2a的内 径尺寸， 较佳地， 两个第二内径 2b与该第一内径 2a之间还具有一个第三内径 2c， 各第三内径 2c的内径尺寸介于该第一内径 2a与第二内径 2b的内径尺寸之间。 形成 该第一内径 2a的该螺母 2内壁面具有一个内螺纹 21， 形成该第二内径 2b的该螺母 2 内壁面可以为一个密合部 22， 以及， 形成该第三内径 2c的该螺母 2内壁面可以为 一个透空部 23。 该螺母 2较佳具有贯通该内壁面、 外壁面的至少一个通孔 24, 该 至少一个通孔 24各可以被一个塞件 25呈可启的封闭， 使润滑油可以该至少一个 通孔 24充填于该螺母 2内。 此外， 当该螺母 2成固定的不旋转时， 该通孔 24可以 为两个， 且该两个通孔 24各可以连接一个导油管（图未绘示）， 使润滑油可以由该 两个通孔 24形成循环， 会有更佳的润滑效果。
[0069] 请参照图 2、 图 3及图 4所示， 该行星组 3具有一个支撑结构， 该支撑结构可以支 持多个滚柱 33定位旋转， 在本实施例中， 该支撑结构由两个固定板 31间设有多 个固定柱 32所构成， 该两个固定板 31的中心部位各具有一个穿孔 311， 该主螺杆 1可以贯穿通过而不接触该两个穿孔 311。 各固定板 31还具有环绕于该穿孔 311周 围的多个组装孔 312, 该多个组装孔 312环设于以该穿孔 311为中心的同一半径的 圆周上。
[0070] 该多个固定柱 32由两端可以分别结合于该两个固定板 31， 使该多个固定柱 32可 以与该两个固定板 31共同形成稳定的支撑结构， 该多个固定柱 32环绕于该主螺 杆 1外周不与该主螺杆 1及该螺母 2接触。 在本实施例中， 各固定柱 32的两端各具 有一个凸出于该两个固定板 31的结合部 321， 各凸出的结合部 321可以分别与一 个结合件 322结合固定， 在本实施例中， 该结合部 321可以具有外螺纹， 该结合 件 322可以为一个螺帽； 该结合件 322可以沉设于该组装孔 312, 或者该结合件 32 2可以凸出于该两个固定板 31的外表面， 该两个固定板 31及该凸出的结合件 322 可以对应于该螺母 2的该第三内径 2c部位， 且该两个固定板 31及该结合件 322不与 该第三内径 2c部位接触。
[0071] 该多个滚柱 33的两端各具有一个组装部 331， 两个组装部 331各可以穿设于该两 个固定板 31的组装孔 312成活动旋转， 该多个滚柱 33彼此相同且各具有外螺纹 33 2， 各外螺纹 332分别可以与该主螺杆 1的外螺纹 11及该螺母 2的内螺纹 21相啮合 ， 如此， 在该支撑结构的该两个固定板 31及该多个固定柱 32不与该主螺杆 1及该 螺母 2接触情形下， 各滚柱 33可以相对于该主螺杆 1及该螺母 2公转及自转。
[0072] 该滚柱 33的该外螺纹 332与该主螺杆 1的外螺纹 11及该螺母 2的内螺纹可以同为 单线螺纹或多线螺纹， 此外， 该主螺杆 1的外螺纹 11形状及该螺母 2的内螺纹 21 形状较佳形成相同， 且该滚柱 33的外螺纹 332形状较佳与该主螺杆 1的外螺纹 11 形状及该螺母 2的内螺纹 21形状形成不同， 如图 5所示， 该主螺杆 1的该外螺纹 11 形状及该螺母 2的内螺纹 21形状形成山形， 该滚柱 33的该外螺纹 322形成圆弧角 ， 如此， 可以减少该滚柱 33的该外螺纹 332与该主螺杆 1的该外螺纹 11的接触面 积， 据此， 可以降低该两个外螺纹部 11、 332之间的摩擦力， 具有减少噪音产生 及提升旋转顺畅度的效果。 相对地， 在其他实施例中， 也可选择使该主螺杆 1的 该外螺纹 11形状及该螺母 2的内螺纹 21形状形成圆弧角， 该滚柱 33的该外螺纹 33 2形成山形的形态， 本发明不加以限制。
[0073] 该多个滚柱 33与该多个固定柱 32的中心较佳在同一半径圆周上， 且以规则方式 成等角分布地环设于该主螺杆 1外周， 以及， 该多个滚柱 33与该多个固定柱 32较 佳成整数比的设置， 使任意两个相邻的固定柱 32之间具有相同数量的滚柱 33。 例如， 在本实施例中， 该滚柱 33与该固定柱 32的总数为九个， 该多个滚柱 33与 该多个固定柱 32的数量比为 2: 1， 借此， 可以使该多个固定柱 32可均匀的承受 该多个滚柱 33与主螺杆 1及螺母 2进行公转的摩擦力， 以达到良好的平衡受力。
[0074] 请参照图 2、 图 4所示， 该螺母 2的轴向上的相对两端面还各具有一个封闭件 4， 该封闭件 4成可拆解地结合于该螺母 2的密合部 22, 该封闭件 4能够将润滑油封闭 于该螺母 2的孔内， 以避免该润滑油漏出， 以提升工作环境的整洁度， 并且防止 外界的灰尘或异物掉入该螺转空间 31， 避免影响该螺母 2与该主螺杆 1的旋转顺 畅度。 在本实施例中， 以一个定位组件贯穿该螺母 2用于固定该该封闭件 4, 使 该封闭件 4与该螺母 2可以同步转动， 较佳地， 该封闭件 4与该螺母 2之间较佳具 有止漏件 34, 以避免润滑油由该封闭件 4与该螺母 2接合部位漏出。 该封闭件 4具 有供该主螺杆 1穿伸的一个穿伸孔 41， 使该主螺杆 1可以轴向贯穿该螺母 2内部， 该穿伸孔 41可以具有内螺纹 42, 该内螺纹 42与该主螺杆 1的外螺纹 11相螺合。 借 此， 该封闭件 4及该螺母 2可以成一体的与该主螺杆 1作相对运动， 以使用于一个 工具机， 例如： 于塑胶射出成型机中， 该封闭件 4及该螺母 2可以成定位旋转， 该主螺杆 1可以作相对的线性移动， 以将塑料由射嘴射出； 或者， 于其它加工机 械当中， 该主螺杆 1可以成定位的旋转， 使该封闭件 4及该螺母 2可以作相对的轴 向位移工作。
[0075] 请参照图 6所示， 该圭寸闭件 4还可以由桂胶、 橡胶等具有弹性的材质所制成， 使 该封闭件 4的内螺纹 42可以贴合于该主螺杆 1的外螺纹 11， 以避免润滑油随着该 主螺杆 1的转动而漏出。 或者， 还可以通过该封闭件 4的内螺纹 42的螺距 D1与该 主螺杆 1的该外螺纹 11的螺距 D2形成不同； 或者该封闭件 4的内螺纹 42的螺形与 该主螺杆 1的该外螺纹 11的螺形不同； 借此， 该封闭件 4的内螺纹 42与该主螺杆 1 的外螺纹 11可以进一步形成较紧密的贴合， 且通过该封闭件 4的材质具有弹性， 也不会对该主螺杆 1的旋转产生过多的阻碍， 具有提升该封闭件 4与该主螺杆 1的 密闭性效果。
[0076] 请参照图 7所示， 其为本发明行星螺杆的第二实施例， 与第一实施例相较， 在 本实施例中， 该多个固定柱 32 / 各具有外螺纹 323 / 且彼此相同， 各外螺纹 323 / 分别可以与该主螺杆 1的外螺纹 11及该螺母 2的内螺纹 21相啮合； 该多个固定 柱 32 / 由两端可以穿伸于该两个固定板 31， 使该多个固定柱 32 / 的一个结合部 3 21 / 可以凸出于该两个固定板 31， 且该两个结合部 32r 各可以被一个结合件 32 2 / 结合， 该两个结合部 32r 可以为外螺纹， 各结合件 322 / 可以为一个螺帽， 各结合件 322 / 与该两个固定板 31之间各具有一个间隙 G， 该间隙 G略大于该外螺 纹 323 / 与该主螺杆 1的外螺纹 11及该螺母 2的内螺纹 21的啮合间隙， 如此， 可以 使该多个固定柱 32 / 与该两个固定板 31可以共同形成稳定的支撑结构， 及使该 多个固定柱 32 / 可以相对于该两个固定板 31成微小的轴向移动。 该结合件 322 / 同可以沉设于该组装孔 312, 或者该结合件 322 / 可以凸出于该两个固定板 31的 外表面， 及该两个固定板 31及该凸出的结合件 322 / 不与该该螺母 2的第三内径 2c 部位接触。
[0077] 通过上述结构， 本发明的行星螺杆动作时， 可以驱动该主螺杆 1旋转， 使啮合 于该主螺杆 1的外螺纹 11与该螺母 2的内螺纹 21的该多个滚柱 33可以形成自转及 共同围绕该主螺杆 1进行公转， 如此， 当该螺母 2成定位旋转时， 该主螺杆 1可以 作相对的线性移动， 且通过该主螺杆 1的正、 反向旋转， 使该主螺杆 1可以作反 复的线性移动； 或该主螺杆 1成定位的旋转时， 该封闭件 4及该螺母 2可以作相对 的轴向位移， 且通过该主螺杆 1的正、 反向旋转， 使该封闭件 4及该螺母 2可以作 反复的线性移动。
[0078] 综上所述， 本发明的行星螺杆， 主要通过该支撑结构与该主螺杆及该螺母成未 接触， 及仅通过该多个滚柱的外螺纹与该主螺杆的外螺纹及该螺母的内螺纹啮 合， 使该多个滚柱成可以相对于该主螺杆及螺母成自转及公转， 整体上具有较 为简单的构造及可以减少摩擦， 如此， 可大幅地降低该行星螺杆的加工成本， 及可以提升生产及组装效率。 且由于该支撑结构未与该主螺杆及螺母直接接触 ， 进而可以降低该行星螺杆旋转时所形成噪音等效果。 此外， 将本发明的行星 螺杆使用于工具机时， 还可以方便地进行维修及容易地填充润滑油等效果。
[0079] 虽然本发明已利用上述较佳实施例公开， 但是其并非用以限定本发明， 任何熟 习此技艺者在不脱离本发明的精神和范围之内， 相对上述实施例进行各种更动 与修改仍属于本发明所保护的技术范畴， 因此本发明的保护范围应当以权利要 求书所界定为准。

Claims

权利要求书
[权利要求 1] 一种行星螺杆， 其特征在于， 包括：
一个主螺杆， 具有一个外螺纹及一个连接部；
一个螺母， 具有一个贯穿该螺母两端面的孔， 且形成该孔的内壁面具 有一个内螺纹； 及
一个行星组， 具有一个支撑结构， 该支撑结构用于支持多个滚柱于该 支撑结构定位旋转， 该多个滚柱彼此相同且具有外螺纹， 多个滚柱的 外螺纹与该主螺杆的外螺纹及该螺母的内螺纹相啮合。
[权利要求 2] 如权利要求 1所述的行星螺杆， 其特征在于， 该内壁面为阶梯型孔， 于中间段的内壁面具有一个第一内径， 在该螺母两端边的内壁面具有 一个第二内径， 该第二内径部位为密合部， 该密合部的内径尺寸大于 该第一内径的内径尺寸， 该内螺纹位于第一内径部位。
[权利要求 3] 如权利要求 1所述的行星螺杆， 其特征在于， 该螺母具有贯通该内壁 面、 外壁面的至少一个通孔， 该至少一个通孔能够被一个塞件呈可启 的圭寸闭。
[权利要求 4] 如权利要求 3所述的行星螺杆， 其特征在于， 该通孔为两个， 且两个 通孔能够连接一个导油管。
[权利要求 5] 如权利要求 1所述的行星螺杆， 其特征在于， 该支撑结构由两个固定 板及多个固定柱所构成， 该两个固定板的中心部位各具有一个穿孔及 环绕于该穿孔周围的多个组装孔， 该多个组装孔位于以该穿孔中心为 中心的同一半径的圆周上， 该多个固定柱的两端分别结合于该组装孔
[权利要求 6] 如权利要求 5所述的行星螺杆， 其特征在于， 该多个固定柱的两端各 具有凸出于该两个固定板的一个结合部， 该结合部具有外螺纹， 各结 合部供一个结合件以螺纹螺合固定。
[权利要求 7] 如权利要求 6所述的行星螺杆， 其特征在于， 该多个固定柱各具有外 螺纹且彼此相同， 各外螺纹分别能够与该主螺杆的外螺纹及该螺母的 内螺纹相啮合， 各结合件与该两个固定板之间各具有一个间隙， 各间 隙大于各固定柱的该外螺纹与该主螺杆的外螺纹及该螺母的内螺纹的 啮合间隙。
[权利要求 8] 如权利要求 6所述的行星螺杆， 其特征在于， 该结合件沉设于该组装 孔。
[权利要求 9] 如权利要求 6所述的行星螺杆， 其特征在于， 该结合件凸出于该两个 固定板的外表面且不与该螺母接触。
[权利要求 10] 如权利要求 5所述的行星螺杆， 其特征在于， 该多个滚柱的两端各具 有一个组装部， 各组装部能够穿设于该两个固定板的组装孔以便活动 旋转。
[权利要求 11] 如权利要求 10所述的行星螺杆， 其特征在于， 任意两个相邻的固定柱 之间的行星滚柱数量相同。
[权利要求 12] 如权利要求 1所述的行星螺杆， 其特征在于， 该螺母两端的密合部各 具有一个封闭件， 该封闭件成可拆解地结合于该螺母。
[权利要求 13] 如权利要求 12所述的行星螺杆， 其特征在于， 该封闭件由弹性材质制 成。
[权利要求 14] 如权利要求 13所述的行星螺杆， 其特征在于， 该封闭件与该主螺杆以 螺纹相螺合， 该封闭件与该主螺杆的外螺纹的螺距或螺形不同。
[权利要求 15] 一种工具机， 其特征在于， 具有如权利要求 1至 14中任一项所述的行 星螺杆。
PCT/CN2018/117439 2018-11-26 2018-11-26 行星螺杆及具有该行星螺杆的工具机 WO2020107150A1 (zh)

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