WO2007126084A1 - ねじ装置及びその製造方法 - Google Patents
ねじ装置及びその製造方法 Download PDFInfo
- Publication number
- WO2007126084A1 WO2007126084A1 PCT/JP2007/059256 JP2007059256W WO2007126084A1 WO 2007126084 A1 WO2007126084 A1 WO 2007126084A1 JP 2007059256 W JP2007059256 W JP 2007059256W WO 2007126084 A1 WO2007126084 A1 WO 2007126084A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nut
- rolling
- groove
- rolling element
- deflector
- Prior art date
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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
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
- F16H25/2214—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with elements for guiding the circulating balls
- F16H25/2223—Cross over deflectors between adjacent thread turns, e.g. S-form deflectors connecting neighbouring threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2618—Moulds having screw-threaded mould walls
-
- 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
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
- F16H25/2214—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with elements for guiding the circulating balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/04—Bearings
-
- 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
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
- F16H2025/2481—Special features for facilitating the manufacturing of spindles, nuts, or sleeves of screw devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49636—Process for making bearing or component thereof
- Y10T29/49643—Rotary bearing
- Y10T29/49679—Anti-friction bearing or component thereof
- Y10T29/49691—Cage making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19642—Directly cooperating gears
- Y10T74/19698—Spiral
- Y10T74/19702—Screw and nut
- Y10T74/19744—Rolling element engaging thread
- Y10T74/19749—Recirculating rolling elements
- Y10T74/19767—Return path geometry
- Y10T74/19772—Rolling element deflector
Definitions
- the present invention relates to a return pipe type or end cap type screw device in which a rolling member that rolls between a screw shaft and a nut is circulated by a circulating member such as a return pipe or an end cap, and its manufacture. Regarding the method.
- the present invention also relates to a deflector type screw device that returns a rolling element that rolls between a screw shaft and a nut to a loaded rolling element rolling groove before the deflector and a manufacturing method thereof.
- a ball screw can reduce the coefficient of friction when rotating a screw shaft with respect to a nut, compared with a screw that makes sliding contact, so a positioning mechanism of a machine tool, an automobile steering, a guide device, It has been put to practical use in various fields such as exercise screws.
- the return pipe type ball screw is composed of a spiral ball rolling groove 1a on the outer periphery of the screw shaft 1 and a spiral load ball rolling groove 2a on the inner periphery of the nut 2.
- a plurality of balls 3 are placed in the load ball rolling path between them, and a ball return passage for circulating the balls 3 is formed in a gate-shaped return pipe 4 (circulation member) provided on the nut 2 (for example, (See Patent Document 1).
- a return nove insertion hole 2b reaching the load ball rolling groove 2a is formed on the side surface of the nut 2.
- the leg portion 4a of the return pipe 4 is inserted into the return nove insertion hole 2b, one end and the other end of the spiral load ball rolling groove 2a of the nut 2 are connected by the ball return passage of the return pipe 4.
- a plurality of balls 3 interposed between the screw shaft 1 and the nut 2 circulate in a ball circulation path constituted by a spiral load ball rolling groove 2 a and a ball return passage in the return pipe 4.
- the ball 3 is a ball return path of the return pipe 4 from the loaded ball rolling groove 2a of the nut 2. Or on the contrary, the return pipe 4 moves to the loaded ball rolling groove 2a. At this time, if a step occurs at the joint between the load ball rolling groove 2a of the nut 2 and the ball return passage of the return knob 4, smooth movement of the ball 3 is hindered. Therefore, as shown in FIG. 31, the connecting portion 7 of the load ball rolling groove 2a with the ball return path 5 is eliminated so that the step of the joint 6 with the ball return path 5 of the load ball rolling groove 2a is eliminated. Is chamfered.
- the cross-sectional shape of the loaded ball rolling groove 2a consists of two arcs so that the ball contacts the loaded ball rolling groove 2a at two points. It is formed in a Gothic arch groove shape.
- the cross-sectional shape of the ball return passage 5 is formed into a single circular shape.
- the connecting portion 7 is also chamfered so that the cross-sectional shape of the loaded ball rolling groove 2a is continuously changed to match the cross-sectional shape of the ball return path 5 at the joint 6.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-18359
- FIG. 32 shows a deflector-type ball screw.
- a deflector receiving hole 72 is formed in the side surface of the nut 71, and the deflector 73 is received in the deflector receiving hole 72.
- the deflector 73 is formed with an S-shaped return groove 73a that connects one end and the other end of a spiral loaded ball rolling groove 71a formed on the inner peripheral surface of the nut 71 with less than one turn.
- the return groove 73a causes the ball 75 to be detached from the ball rolling groove 76a of the screw shaft 76, get over the thread 76b of the screw shaft 76, and return to the ball rolling groove 76a before one winding.
- After the resin-molded deflector 73 is fitted into the deflector receiving hole 72 of the nut 71, it is fixed to the nut 71 with an adhesive.
- the wing-type deflector 82 includes a deflector body 82a in which a return groove 82c is formed, and a wing portion 82b that protrudes from the side force of the deflector body 82a and fits into the load ball rolling groove 81a of the nut 81. Since the ball 85 is interposed between the return groove 82c of the deflector 82 and the screw shaft 84, the deflector 82 can be prevented from falling to the screw shaft 84 side.
- Patent Document 2 JP 2002-106672 A
- an object of the present invention is to provide a screw device in which a step is unlikely to occur at a joint between a load ball rolling groove of a nut and a ball return passage of a circulation member, and a manufacturing method thereof.
- the outer shape of the deflector 73 is slightly smaller than the deflector receiving hole 72. Therefore, as shown in FIG. 34, a slight gap is opened between the periphery of the deflector 73 and the inner wall surface of the deflector receiving hole 72. Since the operation of bonding the deflector 73 to the nut 71 is a human manual operation, the deflector 73 may be displaced. Therefore, a gap or a step may be generated at the joint 78 between the return groove 73a of the deflector 73 and the load ball rolling groove 71a of the nut 71.
- a gap is formed between the periphery of the deflector 82 and the deflector receiving hole 88 so that the cutter 82 can swing. This is because, by swinging the deflector 82, the impact when the ball collides with the deflector 82 can be reduced. However, when the deflector 82 swings from the state shown by the solid line in the figure to the state shown by the broken line in the figure, that is, tilts, the joint between the load ball rolling groove 81a of the nut 81 and the return groove 82c of the deflector 82 is connected. A gap or step occurs in 86. The level difference and gap between the joints hinder the smooth movement of the ball.
- the ball 85 interposed between the return groove 82c of the deflector 82 and the screw shaft 84 prevents the deflector 82 from dropping toward the screw shaft 84. ing.
- the deflector 82 also slightly falls to the screw shaft 84 side.
- a step is created at the joint 86 between the load ball rolling groove 81a of the nut 81 and the return groove 82c of the deflector 82, and the ball 85 is the end of the return groove 82c of the deflector 82. Collide with.
- an object of the present invention is to provide a screw device in which a step is unlikely to occur at a joint between a load ball rolling groove of a nut and a ball return groove of a deflector, and a manufacturing method thereof.
- the invention according to claim 1 is characterized in that a screw shaft (1) having a spiral rolling element rolling groove (la) on an outer peripheral surface and the screw shaft on an inner peripheral surface.
- a nut (11) having a spiral loaded rolling element rolling groove (11a) facing the rolling element rolling groove (la) of (1), and the loaded rolling element rolling groove of the nut (11).
- a circulating member (12) having a rolling element return passage (13) connecting one end and the other end of (11a), the rolling element rolling groove (la) of the screw shaft (1), and the nut (11). The rolling element rolling path between the rolling element rolling groove (11a) and the rolling member (12).
- a plurality of rolling elements (3) accommodated in the body return passage (13), and the rolling element (3) rolling on the loaded rolling element rolling path is connected to one end (14) of the circulation member (12). , 34) and the screw device returning from the other end (15, 35) of the circulating member (12) to the end (14, 15, 34, 35) of the circulating member (12).
- ) Is on the side of the loaded rolling element rolling groove (11a) of the nut (11), and the rolling groove continuous part (22) connected to the loaded rolling element rolling groove (11a) of the nut (11) , 37) and a lifting part (23, 38) which is on the rolling element rolling groove (la) side of the screw shaft (1) and raises the rolling element (3) to the rolling force of the loaded rolling element.
- at least the rolling groove continuous portions (22, 37) of the end portions (14, 15, 34, 35) are made of resin and are formed integrally with the nut (11). It is characterized by this.
- the invention according to claim 2 is the screw device according to claim 1, wherein the raised portion (23, 38) of the end portion (14, 15, 34, 35) of the circulation member (12). ) Is made of resin, and is formed integrally with the rolling groove continuous portion (22, 37).
- the invention according to claim 3 is the screw device according to claim 1 or 2, wherein the side surface of the nut (11) has a rolling groove (11a) of the load rolling element of the nut (11). A through-hole (18) reaching up to is formed, and at least the rolling groove continuous portion (22,37) force of the end portion (14,15,34,35) of the circulation member (12) ) Is integrally formed on the inner peripheral surface.
- the invention according to claim 4 is the screw device according to claim 3, wherein the inner peripheral surface of the through hole (18) and the raised portion of the end portion (14, 15, 34, 35). It is characterized in that there is a clearance between the outer peripheral surface (30) of (23, 38) so that the mold can be inserted.
- the invention according to claim 5 is the screw device according to claim 3 or 4, wherein the pair of end portions (14, 15, 34, 35) protrudes through the through hole (18), and the circulation
- the member (12) has a connecting portion (17) for connecting the pair of end portions (14, 15, 34, 35) of the circulating member (12) protruding through the through hole (18) force,
- a connection return passage (19) for connecting the rolling element return passage (13) of the pair of end portions (14, 15, 34, 35) is formed in the connection portion (17).
- the invention according to claim 6 is the screw device according to any one of claims 1 to 5, wherein the rolling elements (3) are prevented from contacting each other between the plurality of rolling elements (3). It is characterized by interposing a spacer (8).
- the invention according to claim 7 is the screw device according to claim 1 or 2, wherein the circulation is performed.
- a member is a deflector that is mounted on the nut and returns a rolling element that rolls on the rolling element rolling path to the rolling element rolling groove that is one turn before, and inside the nut is the load rolling element of the nut.
- a deflector housing hole reaching the moving body rolling groove is formed, and at least the rolling groove continuous portion of the end portion of the deflector is formed integrally with an inner peripheral surface of the deflector housing hole.
- the invention of claim 8 is directed to a screw shaft (1) having a spiral rolling element rolling groove (la) on an outer peripheral surface, and the rolling element rolling of the screw shaft (1) on an inner peripheral surface.
- a nut (11) having a spiral loaded rolling element rolling groove (11a) facing the running groove (la), and one end and the other end of the loaded rolling element rolling groove (11a) of the nut (11) And rolling up the rolling element (3) rolling on the loaded rolling element rolling groove (11a) at one end (14, 34) and the other end.
- the circulating member (12) returned from (15, 35) and the rolling element rolling groove (la) of the screw shaft (1) and the loaded rolling element rolling groove (11a) of the nut (11).
- the invention according to claim 9 is the method of manufacturing the screw device according to claim 8, wherein the raised portion (14, 15, 34, 35) of the end portion (14, 15, 34, 35) of the circulation member (12) 23, 38) is formed integrally with the rolling groove continuous portion (22, 37) with a resin.
- the invention according to claim 10 is the method of manufacturing the screw device according to claim 8 or 9, wherein the load on the inner peripheral surface of the nut (11) is provided on a side surface of the nut (11).
- a through hole (18) reaching the rolling element rolling groove (1 la) is opened, and at least the rolling groove continuous part (22 of the end part (14, 15, 34, 35) of the circulation member (12) is formed. , 37) are integrally formed on the inner peripheral surface of the through hole (18).
- the invention according to claim 11 is the manufacture of the screw device according to any one of claims 8 to 10.
- the mold is disposed inside the nut (11), and the end (14, 15, 34, 35) of the circulation member (12) projecting into the nut (11) is inserted. It has a nut inner mold (27, 28) for forming.
- the invention according to claim 12 is the method of manufacturing the screw device according to any one of claims 8 to 11, wherein the mold is formed in a through hole (18) opened in a side surface of the nut (11).
- a pin-shaped mold (33) inserted into the circulating member (12) to form the rolling element return passage (13) of the end (14, 15, 34, 35) of the circulation member (12). It is characterized by.
- the invention of claim 13 is the method of manufacturing a screw device according to any of claims 8 to 12, wherein the mold is formed in a through hole (18) opened in a side surface of the nut (11). To form the outer peripheral surface (30) on the side of the raised portion (23, 38) among the outer peripheral surfaces of the end portions (14, 15, 34, 35) of the circulation member (12). It has a cross-sectional arc-shaped mold (29) for the purpose.
- the invention according to claim 14 is the method of manufacturing a screw device according to any of claims 8 to 13, wherein the end portions (14, 15, 34, 35) of the circulation member (12) are the same.
- the rolling groove continuous portion (22, 37) is formed by integrally molding the rolling groove continuous portion (22, 37) on the nut with grease, and then the loaded rolling element rolling groove of the nut (11). It is cut or ground together with (11a).
- the invention according to claim 15 is a screw shaft (53) having a spiral rolling element rolling groove on an outer peripheral surface, and the rolling element rolling groove (of the screw shaft (53) on an inner peripheral surface ( 53a), a nut (51) having a spiral loaded rolling element rolling groove (51a), and less than one turn of the rolling element rolling groove (53a) of the screw shaft (53) and the nut (51).
- the rolling element rolling groove (51a) of less than one turn so that the rolling element (55) rolling on the rolling element rolling path between the rolling element rolling groove (51a) and the loaded rolling element rolling groove (51a) can be circulated.
- a rolling member circulation including a deflector (54) having a return groove (54a) connecting one end and the other end thereof, a loaded rolling element rolling groove (51a) less than one round and the return groove (54a)
- a screw device including a plurality of rolling elements (55) accommodated in a path, the return groove (54a) of the deflector (54) and the load rolling element rolling groove (51a) of the nut (51); At the seam (58) Such that the difference does not occur, wherein the ⁇ made of the deflector (54) is integrally formed with said nut (51).
- the invention according to claim 16 is a load rolling element rolling groove having a spiral shape less than one round on the inner peripheral surface (51
- the nut (51) having a) is a nut that integrally molds a resin-made deflector (54) having a return groove (54a) that connects one end and the other end of the load rolling element rolling groove (51a).
- a manufacturing method comprising: a deflector housing hole machining step for machining a deflector housing hole (52) in accordance with the shape of the deflector (54) in the nut (51); and the loaded rolling element rolling of the nut (51).
- An inner mold (64) having a return groove convex part (68) is inserted inside the nut (51), and the groove fitting convex part (66) of the inner mold (64) is inserted into the inner mold (64).
- the invention according to claim 17 is characterized in that the loaded rolling element rolling groove (51a) is provided on a nut (51) having a spiral rolling rolling element rolling groove (51a) of less than one round on an inner peripheral surface.
- a nut manufacturing method in which a resin-made deflector (54) having a return groove (54a) for connecting one end and the other end of the nut is integrally formed, wherein the nut (51) has the shape of the deflector (54).
- Deflector housing hole machining step for machining the combined deflector housing hole (52), the housing hole fitting convex portion (67) having the shape matched to the deflector housing hole (52) of the nut (51), and the housing
- An inner mold (64) provided in a hole fitting convex portion (67) and having a return groove convex portion (68) for forming the return groove (54a) of the deflector (54).
- the invention according to claim 18 is the nut manufacturing method according to claim 16 or 17, wherein in the deflector housing hole machining step, the nut (51) penetrates from the inner peripheral side to the outer peripheral side.
- the deflector housing hole (52) is machined, and in the mold mounting step, the outer mold (60) is mounted outside the nut (51), and in the molding step, the inner mold (64)
- a resin is injected into the deflector housing hole (52) of the nut (51) to which the outer mold (60) is attached.
- the raised portion of the circulating member can be formed in the through hole of the nut.
- connection return passage for circulating the rolling elements through the circulation member.
- the spacer interposed between the rolling elements also smoothly moves to the rolling groove continuous portion of the circulating member rolling groove rolling force of the nut.
- the rolling groove continuous portion of the circulation member is formed integrally with the nut, the load rolling element rolling groove of the nut and the rolling groove continuous portion of the circulation member are formed. Steps can be eliminated. Therefore, smooth circulation of the rolling elements becomes possible.
- the end of the circulating member protruding into the nut can be formed by the nut internal mold.
- the end portion of the circulation member is rolled by the pin-shaped mold.
- a body return passage can be formed.
- the outer peripheral surface of the end portion of the circulating member can be formed by the cross-section arc mold.
- the step between the loaded rolling element rolling groove of the nut and the rolling groove continuous portion of the circulating member can be further eliminated.
- a groove fitting convex portion having a shape matched to the load rolling element rolling groove of the nut, and a return groove convex portion continuing to the groove fitting convex portion, Since the deflector is formed by using the inner mold having, the step difference of the joint between the loaded rolling element rolling groove of the nut and the return groove of the deflector can be eliminated.
- the inner mold having the convex part for the return groove for forming the return groove of the deflector can be accurately positioned with respect to the nut, the return groove of the deflector is accommodated in the deflector. It can be accurately shaped at a predetermined position in the hole.
- the deflector housing hole is formed as compared with the case where the deflector housing hole that also becomes a blind hole is processed from the inner peripheral side of the nut and the deflector is formed only by the inner mold. Processing becomes easy.
- FIG. 1 is a perspective view of a nut of a screw device according to a first embodiment of the present invention.
- FIG. 2 is a perspective view of the nut of the screw device according to the first embodiment of the present invention (with the coupling part disassembled).
- FIG. 3 is a perspective view of the nut of the screw device according to the first embodiment of the present invention (with the coupling part disassembled).
- FIG. 4 Perspective view of end of circulation member
- FIG.5 Perspective view of scooping part exposed inside nut
- FIG. 6 Diagram showing the positional relationship between the loaded ball rolling groove of the nut and the heel and the part ((A) in the figure shows a disengaged state, and (B) in the figure shows an aligned state)
- FIG.7 Perspective view of nut and mold
- Figure 8 Diagram showing the mold with the shaft-shaped mold removed
- FIG. 15 Diagram showing the motion of a sphere fitted in the groove of the shaft-shaped mold
- FIG. 19 Diagram showing the ball moving on the screw shaft (perspective view of the screw shaft)
- FIG. 23 Perspective view of a nut covered with a deflector receiving hole
- FIG.24 Cross-sectional view of a nut covered with a deflector receiving hole
- FIG. 29 is a view showing a state in which the inner mold and the outer mold are attached to the nut.
- FIG. 30 is a perspective view showing a conventional ball screw.
- FIG. 31 is a cross-sectional view showing a connecting portion between a loaded ball rolling groove and a ball return passage
- FIG. 32 is a perspective view showing a conventional deflector type ball screw.
- FIG. 33 is a perspective view showing a conventional wing deflector type ball screw.
- FIG.34 Sectional view showing a conventional deflector-type ball screw
- FIG. 35 is a sectional view showing a conventional wing deflector type ball screw. Explanation of symbols
- FIG. 1 to 3 show a nut of a screw device according to a first embodiment of the present invention.
- FIG. 1 shows the nut 11 with the circulating member 12 assembled
- FIGS. 2 and 3 show the nut 11 with the circulating member 12 disassembled.
- a loaded ball rolling groove is formed as a spiral loaded rolling element rolling groove facing the rolling element rolling groove of the screw shaft.
- a screw shaft having a ball rolling groove as a spiral rolling element rolling groove on the outer peripheral surface is incorporated.
- a plurality of balls are arranged and accommodated as rolling elements.
- a spiral ball rolling groove la having a predetermined lead is machined on the outer periphery of the screw shaft 1.
- the cross section of the ball rolling groove la is formed in a circular arc groove composed of a single arc and a Gothic groove groove combining two arcs. Since the ball 3 rolls on the ball rolling groove la of the screw shaft 1, the surface of the ball rolling groove la is hardened.
- various types such as a single thread, a double thread, and a triple thread can be used.
- a spacer 8 is interposed between the balls 3 to prevent the balls 3 from contacting each other.
- a nut 11 is screwed onto the screw shaft 1.
- a spiral loaded ball rolling groove 11 a facing the ball rolling groove la of the screw shaft 1 is machined on the inner peripheral surface of the nut 11.
- the cross section of the loaded ball rolling groove 11a is also formed as a circular arc groove having a single arc force, or a Gothic arch groove combining two arcs. Since the ball 3 rolls on the loaded ball rolling groove 11a, the surface of the loaded ball rolling groove 11a is also hardened.
- a flat flat surface portion l ib is formed on the side surface of the nut 11.
- the flat portion l ib of the nut 11 includes a circulating member 12 for circulating the ball 3 rolling on the loaded ball rolling path between the ball rolling groove la of the screw shaft 1 and the loaded ball rolling groove 11a of the nut 11.
- the circulation member 12 is formed with a ball return passage 13 as a rolling element return passage that connects one end and the other end of the load ball rolling groove 11a of the nut 11 (see FIG. 2).
- a plurality of balls 3 are arranged and accommodated in a ball circulation path constituted by the loaded ball rolling path and the ball return path 13.
- the ball 3 rolls between the ball rolling groove la of the screw shaft 1 and the loaded ball rolling groove 11 a of the nut 11.
- the ball 3 rolled to one end of the load ball rolling path is lifted by the load ball rolling path force by one end 14 of the circulating member 12 and guided to the ball return path 13.
- the inner diameter of the ball return passage 13 is slightly larger than the diameter of the ball 3.
- the front ball 3 moves while being pushed by the subsequent ball 3.
- the ball 3 that has moved in the ball return passage 13 is returned from the other end 15 of the circulation member to the other end of the loaded ball rolling path several turns before. While the screw shaft 1 is rotating with respect to the nut 11, the ball 3 circulates infinitely through the ball circulation path constituted by the loaded ball rolling path and the ball return path 13.
- the circulation member 12 includes a pair of end portions 14, 15 and a connecting portion 17 that connects the pair of end portions 14, 15 protruding from the flat surface portion ib. .
- the internal ball return passages 14a and 15a extend linearly.
- the ball return passages 14a and 15a are arranged in the tangential direction of the load ball rolling path.
- a through hole 18 reaching the load ball rolling groove 11a of the nut 11 is opened in the flat surface portion l ib.
- Ends 14, 15 of the circulating member 12 made of resin are formed into a body on the inner peripheral surface of the through hole 18.
- the connecting portion 17 is made of a molded resin product.
- the connecting portion 17 is formed with a U-shaped connecting return passage 19 that connects the ball return passages 14a and 15a of the pair of end portions 14 and 15.
- the connecting return passage 19 is provided at both ends of the central return passage 19a and the central return passage 19a that linearly extend from one end 14 to the other end 15 of the circulation member 12, and has an arc shape. And an end return passage 19b that bends.
- the connecting portion 17 is divided into left and right parts along the center line of the ball return passage 13, and an extended portion 20 is provided on each body.
- a setscrew for fixing the connecting portion 17 to the side surface of the nut 11 is inserted into the extending portion 20.
- a female screw insertion portion 21 is provided.
- FIG. 4 shows the end portions 14 and 15 of the circulation member 12.
- a pair of end portions 14 and 15 are formed into a body in the pair of through holes 18 of the nut 11.
- the two ends 14, 15 have the same structure, although the arrangement and orientation are different.
- the peripheral edges of the end portions 14 and 15 are located closer to the load ball rolling groove 11a side of the nut 11 than the center line of the ball return passage 13 at the end portions 14 and 15, and are also connected to the load ball rolling groove 11a.
- a continuous portion 22 and a lifting portion 23 which is located on the ball rolling groove side of the screw shaft 1 with respect to the center line of the ball return passage 13 at the end portions 14 and 15 and also scoops up the ball along the load ball rolling path. Can be divided.
- each of the end portions 14 and 15 has a scooping portion 23 that protrudes toward the inner peripheral side of the nut 11.
- the scooping portion 23 comes into contact with the spacer 8 between the boat bottom scooping portion 23a, which also has a groove force gradually narrowing toward the upper side of the end portions 14, 15, and the spacer 8 interposed between the balls 3. It is composed of a tongue-shaped spacer scooping portion 23b.
- the boat bottom crawler 23a holds the ball 3 rolling on the load ball rolling path and guides it to the inside of the ends 14 and 15.
- the spacer scooping portion 23b guides the spacer 8 moving in the load ball rolling path in contact with the spacer 8 to the inside of the end portions 14 and 15.
- spacer scooping portion 23b is omitted in a full ball type screw with no spacer 8 between the balls 3.
- a tongue-shaped ball rod or a portion that comes in contact with the ball 3 and raises the ball 3 with a load ball rolling path force is sometimes provided.
- FIG. 7 shows a mold for forming the end portions 14 and 15.
- a shaft-shaped mold 27 is arranged inside the nut.
- the shaft-shaped die 27 is thicker than the diameter of the screw shaft 1.
- a spiral groove 27a is machined on the outer peripheral surface like the screw shaft 1. This groove 27a forms the end face 24 of the spacer scoop 23b.
- the outer peripheral surface 27b of the shaft-shaped mold 27 forms the groove shape of the boat bottom ridge and the portion 23a. Since the spacer part 23b protrudes into the groove 27a of the shaft-shaped mold 27 after molding, it is necessary to pull out the nut 11 while turning the shaft-shaped mold 27. In the case of continuous machining, in order to form the boat bottom scooping part and the 23a and spacer scooping parts 23b at a fixed position of the nut 11 1, the shaft-shaped mold 27 that has been removed is fixed in the axial direction of the nut 11. Need to return to position.
- the shaft-shaped mold 27 When the shaft-shaped mold 27 is turned and pulled out from the nut 11, the phase of the groove 27a of the shaft-shaped mold 27 that forms the ship bottom scooping portion 23a and the spacer scooping portion 23b, such as returning the same angle as the rotated angle, etc. You must be careful. However, in the case of a full ball type ball screw in which the spacer 8 is not interposed between the balls 3, the space scooping portion 23b is not provided in the scooping portion 23, but only the boat bottom scooping portion 23a is provided. In this case, since there is no spacer scooping portion protruding into the groove 27a of the shaft-shaped mold 27, the shaft-shaped mold 27 can be removed without rotating.
- the thin plate-shaped mold 28 that is bent into a cylindrical shape is provided to form the tips of the end portions 14 and 15. As shown in FIG. 5, the boat bottom crawling portion 23 a slightly protrudes from the nut 11. The thin plate-shaped mold 28 is slid into the gap formed between the shaft-shaped mold 27 and the nut 11 and closes the protruding portion at the lower end of the boat bottom crawling portion 23a. The thin plate-shaped mold 28 and the shaft-shaped mold 27 are arranged inside the nut 11 to form the scooping portion 23 of the end portions 14 and 15 projecting into the nut 11. Therefore, the thin plate mold 28 and the shaft mold 27 are referred to as nut inner molds.
- the arc-shaped mold 29 is inserted into the through hole 18 formed in the side surface of the nut 11. Then, of the outer peripheral surfaces of the end portions 14 and 15, an outer peripheral surface 30 (see FIG. 5) on the lifting portion 23 side is formed. The outer peripheral surface 30 enters the valley bottom of the load ball rolling groove 11a of the nut 11. Even if a die divided in the axial direction into the inside of the nut 11 is inserted from the left and right sides of the nut 11, the outer peripheral surface 30 located in the valley bottom of the load ball rolling groove 11a of the nut 11 is formed. That is not Is possible. Therefore, a cross-section arc-shaped mold 29 inserted into the through hole 18 is required.
- a notch 29 a is formed that matches the outer peripheral surface 27 b of the shaft-shaped mold 27, and a tongue 29 b that fits in the groove 27 a of the shaft-shaped mold 27 is formed. It is done.
- the space between the inner peripheral surface of the through hole 18 and the outer peripheral surface 30 on the side of the raised portion 23 of the end portions 14 and 15 is between , There is enough clearance to insert the arc-shaped mold 29 in cross section.
- the clearance may be filled with inclusions having the same shape as the clearance.
- the pin-shaped mold 33 is inserted into a through hole 18 opened on the side surface of the nut 11 to form the ball return passage 13 of the end portions 14 and 15.
- the lower end of the pin-shaped mold 33 is fitted into the groove 27 a of the shaft-shaped mold 27.
- the lower end of the pin-shaped mold 33 is chamfered in accordance with the groove 27a of the shaft-shaped mold 27, and is also chamfered in accordance with the chamfered portion of the load ball rolling groove 11a of the nut 11. . Therefore, the lower end of the pin-shaped mold 33 is accurately positioned with respect to the shaft-shaped mold 27 and the loaded ball rolling groove 11a of the nut 11.
- the lower end of the pin-shaped mold 33 forms the rolling groove continuous portion 22 of the end portions 14 and 15. Since the lower end of the pin-shaped mold 33 is positioned, the rolling groove continuous portion 22 can be accurately formed, and the joint 36 between the rolling groove continuous portion 22 and the load ball rolling groove 1 la of the nut 11 is obtained. There will be no steps
- FIG. 8 and FIG. 9 show the mold with the shaft-shaped mold 27 removed, with the internal force of the nut 11 taken into account.
- the tip 33 a of the pin-shaped mold 33 and the tongue 29 b of the circular arc-shaped mold 29 are fitted into the groove 27 a of the shaft-shaped mold 27.
- the groove 27a of the shaft-shaped mold 27 is inclined in accordance with the lead of the screw shaft 1.
- the notch 29a of the arc-shaped mold 29 is in contact with the outer peripheral surface 27b of the shaft-shaped mold 27.
- the boat bottom scooping portion 23a of the end portions 14 and 15 is formed by the outer peripheral surface 27b of the shaft-shaped mold 27, and the spacer scooping portion 23b is formed by the groove 27a of the shaft-shaped mold 27.
- the thin plate-shaped mold 28 is provided to fill the steps at the lower ends of the end portions 14 and 15.
- the cavities formed by the arc-shaped mold 29, the pin-shaped mold 33, the shaft-shaped mold 27, and the thin plate-shaped mold 28 form the end portions 14 and 15 of the circulating member 12.
- FIG. 10 and FIG. 11 show a state where all the dies are combined.
- a shaft-shaped mold 27 and a thin plate-shaped mold 28 are set inside the nut 11, and a cross-sectional arc-shaped mold 29 and When the pin-shaped mold 33 is inserted, the cavities of the end portions 14 and 15 are formed. By molding the resin into the cavity, the end portions 14 and 15 are formed integrally with the through hole.
- FIG. 12 shows a nut of a screw device according to the second embodiment of the present invention.
- the rolling groove continuous portion 37 out of the peripheral edges of the end portions 34 and 35 of the circulation member is formed integrally with the through hole 18 of the nut 11.
- the remaining scooped portion 38 is formed into a grease separately from the rolling groove continuous portion 37 and incorporated into the through hole 18.
- Only the rolling groove continuous portion 37 of the end portions 34 and 35 is connected to the loaded ball rolling groove 11a of the nut 11. For this reason, if at least the rolling groove continuous portion 37 of the end portions 34 and 35 is formed integrally with the nut 11, a step does not occur at the joint between the load ball rolling groove 1 la and the ball return passage 13.
- the mold structure is further simplified.
- FIG. 13 shows another example of the mold.
- the end portions 14 and 15 can be integrally formed with the nut by closing the scooping portion 23 projecting into the nut 11 shown in FIG. Therefore, in this embodiment, a small-diameter mold 42 provided with a movable portion 41 is inserted into the nut 11.
- the movable part 41 is protruded to close the scooping part 23 of the end parts 14 and 15.
- the movable portion 41 has a shape that matches the scooping portion 23 that protrudes into the nut 11. In this example, there is an advantage that it is not necessary to turn the mold.
- FIG. 14 shows another example of the shaft-shaped mold.
- a sphere 43 that can protrude into the outer peripheral groove of the shaft-shaped mold 27 is provided.
- four balls 43 are provided in the circumferential direction of the shaft-shaped mold 27.
- the groove 27a of the shaft-shaped mold 27 and the load ball rolling groove 1 la of the nut 11. is there.
- the end portions 14 and 15 of the circulation member 12 can be formed at the exact position of the nut 11.
- the shaft-shaped mold 27 is attached to the nut 11 When the force is released, the ball 43 is retracted.
- the step is surely zero. become.
- the rolling groove continuous portion 22 may be cut or ground together with the load ball rolling groove 11a. More specifically, after forming the end portions 14 and 15 into a cylindrical shape, the ball return passage 13 is formed by cutting a drill, and the scooping portion 23 is formed by cutting or grinding at the ends of the end portions 14 and 15. May be.
- the present invention is not limited to the above-described embodiment, and various modifications can be made without changing the gist of the present invention.
- a through hole is formed in the side surface of the nut, and the end of the circulation member is formed in the through hole.
- the present invention can also be applied to an end cap type screw device. That is, a notch may be provided on the end surface in the axial direction of the nut, and the end of the circulation member may be integrally formed in the notch.
- a rolling element it is also possible to use a roller instead of a ball.
- MIM Metal injection molding
- MIM Metal injection molding
- FIGs. 16 and 17 show a nut 51 of a screw device according to a third embodiment of the present invention. 16 shows a perspective view of the nut 51, and FIG. 17 shows a cross-sectional view.
- a spiral loaded ball rolling groove 5 la is processed on the inner peripheral surface of the nut 51.
- the cross section of the load ball rolling groove 5 la is formed in a circular arc groove composed of a single arc or a Gothic arch groove combining two arcs. Since the ball rolls, the surface of the loaded ball rolling groove 51a is hardened.
- a deflector accommodation hole 52 that penetrates the nut 51 from the inner peripheral side to the outer peripheral side is opened.
- a resin-made deflector 54 is formed in the deflector housing hole 52 into a body.
- a substantially S-shaped return groove 54a that connects one end and the other end of the load ball rolling groove 51a less than one turn of the nut 51 is formed.
- the return groove 54a changes the traveling direction of the ball rolling on the loaded ball rolling groove 51a of the nut 51, gets over the thread of the screw shaft, and returns to the loaded ball rolling groove 51a before one winding.
- the return groove 54a is at its center in the length direction so that the entering ball can get over the thread of the screw shaft. Is also depressed.
- the deflector 54 may be formed with a wing portion 54b that fits into the load ball rolling groove 51a of the nut 51, or as shown in FIG. It does not have to be formed.
- the ball about to move in the lead angle direction of the screw shaft changes its direction by contacting the wing 54b.
- the deflector 54 can be reinforced.
- FIGS. 19 to 21 show a ball 55 moving on the screw shaft 53.
- FIG. 19 shows a perspective view of the screw shaft 53
- FIG. 20 shows a plan view of the screw shaft 53
- FIG. 21 shows the screw shaft 53 with axial force.
- a spiral ball rolling groove 53a having a predetermined lead is processed.
- the cross-sectional shape of the ball rolling groove 53a is formed in a circular arc groove having a single arc force or a Gothic arch groove combining two arcs. Since the ball 55 rolls, the surface of the ball rolling groove 53a is hardened.
- Various types of screws such as a single thread, a double thread, and a triple thread can be used for the screw shaft 53.
- a spacer may be interposed between the balls 55 to prevent the balls 55 from contacting each other.
- the ball 55 moving in the lead angle direction on the ball rolling groove 53a of the screw shaft 53 is changed in the direction toward the screw thread 53b by the return groove 54a of the deflector 54. Get on 53b.
- the ball 55 that has climbed over the thread 53b is returned to the ball rolling groove 53a one turn before. Since the ball 55 moves while being in contact with the thread 53b, the trajectory of the ball 55 in the return groove 54a has a shape that matches the shape of the thread 53b. Since the chamfering is machined at the corner of the thread 53 b, the trajectory of the ball 55 is also a smooth trajectory.
- the return groove 54a of the deflector 54 is recessed in accordance with the outermost position of the trajectory of the ball 55 over the thread 53b.
- a load ball rolling path of less than one turn is formed between the load ball rolling groove 51 a less than one turn of the nut 51 and the ball rolling groove 53 a of the screw shaft 53.
- a no-load return passage is formed between the return groove 54 a of the deflector 54 and the screw shaft 53.
- the loaded ball rolling path and the no-load return path constitute a single ball circulation path.
- a plurality of deflectors 54 are provided in the circumferential direction of the nut 51, and a single ball circulation equal to the number of the deflectors 54 is circulated. A route is provided. When the nut 51 is moved to the end of the screw shaft 53 in the axial direction, the balls 55 can be arranged in the ball circulation path.
- FIG. 22 shows a cross-sectional view of the nut 51 along the return groove 54 a of the deflector 54.
- the deflector 54 is formed integrally with the deflector receiving hole 52 of the nut 51 so that there is no step at the joint 58 between the return groove 54a of the deflector 54 and the load ball rolling groove 51a of the nut 51. Is done. For details, see below.
- the inner and outer molds are installed inside and outside the deflector receiving hole 52 of the nut 51, respectively, and molten resin is injected into the deflector receiving hole 52, so that the deflector 54 becomes the deflector. Molded integrally with the receiving hole 52. Therefore, there is no gap between the periphery of the deflector 54 and the inner peripheral surface of the deflector receiving hole 52.
- the loaded ball rolling groove 51 a is caulked on the inner peripheral surface of the nut 51.
- a deflector receiving hole 52 penetrating from the outer peripheral side to the inner peripheral side is formed in a part of the nut 51 in the circumferential direction by using a cutting tool such as an end mill. I'll do it.
- the planar shape of the deflector receiving hole 52 is square at the center and semicircular at both ends.
- the deflector accommodation hole 52 straddles the adjacent load ball rolling groove 51a.
- the deflector receiving hole 52 is inclined with respect to the axial direction of the nut 51 so that the ball 55 moving in the loaded ball rolling groove 5 la does not change direction suddenly.
- FIG. 24 in order to show the deflector receiving hole 52 of the nut 51 in an easy-to-understand manner, only a part of the circumferential direction of the nut 51 is shown.
- the nut 51 has a cylindrical shape as shown in FIG.
- FIG. 25 shows an outer mold 60 attached to the outer peripheral side of the nut 51.
- the outer mold 60 includes a cylindrical nut contact surface 61 having a shape matched to the outer peripheral surface of the nut 51, and a receiving hole fitting convex portion 62 having a shape matched to the deflector receiving hole 52 of the nut 51.
- the outer mold 60 can be positioned with respect to the nut 51 by fitting the receiving hole fitting convex portion 62 of the outer mold 60 into the deflector receiving hole 52 of the nut 51.
- FIG. 27 shows an inner mold 64 attached to the inner peripheral side of the nut 51.
- the inner mold 64 rises from the nut contact surface 65 that can contact the inner peripheral surface of the nut 51, the groove fitting convex portion 66 that matches the shape of the load ball rolling groove 51a of the nut 51, and the nut contact surface 65.
- a receiving hole fitting convex portion 67 fitted into the deflector receiving hole 52 of the nut 51, and a receiving hole fitting convex portion 67 provided in the receiving hole fitting convex portion 67.
- a return groove convex portion 68 for forming the return groove 54a of the reflector 54.
- the groove fitting convex portion 66 and the return groove convex portion 68 are formed continuously.
- the inner mold 64 has an outflow prevention protrusion that prevents the molten resin injected into the deflector receiving hole 52 from flowing out the force of the load ball rolling groove 51a of the nut 51 (for example, the portion where the wing portion 54b is fitted). A part (not shown) is formed.
- the receiving hole fitting convex portion 67 of the inner die 64 is fitted into the deflector receiving hole 52 of the nut 51, and the groove fitting convex portion 66 of the inner die 64 is fitted to the nut 51.
- the inner die 64 can be positioned with respect to the nut 51 by fitting in the load ball rolling groove 51a. If the inner mold 64 cannot be positioned with respect to the nut 51, the return groove 54a cannot be formed at an accurate position.
- FIG. 29 shows a state in which the inner mold 64 is mounted on the inner peripheral side of the nut 51 and the outer mold 60 is mounted on the outer peripheral side.
- the nut 51 is moved in the axial direction or the nut 51 is rotated, the nut 51 is sandwiched between the inner mold 64 and the outer mold 60.
- Each of the inner mold 64 and the outer mold 60 is provided with receiving hole fitting protrusions 62 and 67 that fit into the deflector receiving hole 52 of the nut 51, so that the inner mold 64 and the outer mold 60 with respect to the nut 51 can be attached. Can be positioned.
- One of the inner mold 64 and the outer mold 60 is provided with a gate.
- the deflector 54 By injecting molten resin into the deflector housing hole 52 from the gate, the deflector 54 can be formed inside the deflector housing hole 52. Since it is necessary to remove the inner mold 64 and the outer mold 60 from the nut 51 after molding, the inner mold 64 and the outer mold 60 are preferably formed by dividing the cylinder in the axial direction rather than the substantially cylindrical shape.
- the force that is deflected so that the deflector receiving hole 52 penetrates from the inner peripheral side to the outer peripheral side of the nut 51 may be a blind hole extending halfway from the outside in the radial direction.
- the outer mold 60 is not necessary, and the deflector 54 can be molded using only the inner mold 64.
- a roller may be used instead of the ball 55 as a rolling element.
- MIM Metal injection molding
- MIM Metal injection molding
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Transmission Devices (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800154328A CN101432550B (zh) | 2006-04-28 | 2007-04-27 | 丝杠装置及其制造方法 |
EP07742691.4A EP2023012B1 (en) | 2006-04-28 | 2007-04-27 | Screw device and method of producing same |
US12/298,832 US8132479B2 (en) | 2006-04-28 | 2007-04-27 | Screw device and method of manufacturing the same |
JP2008513311A JP5236462B2 (ja) | 2006-04-28 | 2007-04-27 | ねじ装置 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-124953 | 2006-04-28 | ||
JP2006124953 | 2006-04-28 | ||
JP2007-091161 | 2007-03-30 | ||
JP2007091161 | 2007-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007126084A1 true WO2007126084A1 (ja) | 2007-11-08 |
Family
ID=38655604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/059256 WO2007126084A1 (ja) | 2006-04-28 | 2007-04-27 | ねじ装置及びその製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8132479B2 (ja) |
EP (1) | EP2023012B1 (ja) |
JP (1) | JP5236462B2 (ja) |
CN (1) | CN101432550B (ja) |
WO (1) | WO2007126084A1 (ja) |
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WO2010043253A1 (en) * | 2008-10-15 | 2010-04-22 | Aktiebolaget Skf | Ball recirculating means and actuating device comprising such means. |
JP2011127719A (ja) * | 2009-12-18 | 2011-06-30 | Showa Corp | ボールネジ装置 |
US8960037B2 (en) | 2010-10-04 | 2015-02-24 | Jtekt Corporation | Ball screw device, linear actuator and vehicle steering system |
CN105443696A (zh) * | 2014-08-29 | 2016-03-30 | 陆如东 | 一种新型滚珠丝杠 |
CN113490804A (zh) * | 2019-02-28 | 2021-10-08 | 株式会社万都 | 滚珠螺母组件的滚珠返回管 |
US11541927B2 (en) * | 2019-10-28 | 2023-01-03 | Jtekt Corporation | Ball screw nut, turning unit, and method for manufacturing ball screw nut |
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JP3878068B2 (ja) * | 2002-06-26 | 2007-02-07 | 株式会社ジェイテクト | デフレクタ式ボールスクリュー装置及びその製造方法 |
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CN101856781B (zh) * | 2010-05-19 | 2012-05-23 | 常州大学 | 一种精密滚珠丝杠制造方法 |
JP5042347B2 (ja) * | 2010-09-06 | 2012-10-03 | Thk株式会社 | 転動体ねじ装置 |
CN102079035A (zh) * | 2010-12-20 | 2011-06-01 | 付俊杰 | 一种滚珠螺旋的加工方法 |
CN102996741B (zh) * | 2011-09-16 | 2015-07-29 | 上银科技股份有限公司 | 具冷却装置的传动模块 |
TWI444543B (zh) * | 2011-11-28 | 2014-07-11 | Hiwin Tech Corp | Internal recirculating ball screw |
US9555538B2 (en) * | 2012-03-30 | 2017-01-31 | Apq Development, Llc | Over-molded component assembly and method of forming the same |
JP6045932B2 (ja) * | 2013-02-12 | 2016-12-14 | 黒田精工株式会社 | ボールねじ用樹脂ナット及びその製造方法 |
JP6408526B2 (ja) | 2016-08-23 | 2018-10-17 | 株式会社サンシン | ボールねじ研磨方法及びその装置 |
DE102016223610A1 (de) * | 2016-11-29 | 2018-05-30 | Schaeffler Technologies AG & Co. KG | Gewindemutter für einen Kugelgewindetrieb |
JP6787139B2 (ja) * | 2017-01-11 | 2020-11-18 | 株式会社ジェイテクト | ボールねじ装置、及びボールねじ装置を備えるステアリング装置 |
JP6381703B2 (ja) * | 2017-02-23 | 2018-08-29 | Thk株式会社 | ねじ装置 |
US11655885B2 (en) * | 2019-12-06 | 2023-05-23 | Pacific Bearing Corp. | Multiliner for multiple start ball nut threads |
CN114321311A (zh) * | 2022-01-25 | 2022-04-12 | 慈兴集团有限公司 | 一种带异形导管循环器的滚珠丝杠副传动装置 |
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- 2007-04-27 JP JP2008513311A patent/JP5236462B2/ja not_active Expired - Fee Related
- 2007-04-27 EP EP07742691.4A patent/EP2023012B1/en not_active Expired - Fee Related
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WO2010043253A1 (en) * | 2008-10-15 | 2010-04-22 | Aktiebolaget Skf | Ball recirculating means and actuating device comprising such means. |
JP2011127719A (ja) * | 2009-12-18 | 2011-06-30 | Showa Corp | ボールネジ装置 |
US8960037B2 (en) | 2010-10-04 | 2015-02-24 | Jtekt Corporation | Ball screw device, linear actuator and vehicle steering system |
CN105443696A (zh) * | 2014-08-29 | 2016-03-30 | 陆如东 | 一种新型滚珠丝杠 |
CN113490804A (zh) * | 2019-02-28 | 2021-10-08 | 株式会社万都 | 滚珠螺母组件的滚珠返回管 |
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Also Published As
Publication number | Publication date |
---|---|
US8132479B2 (en) | 2012-03-13 |
JP5236462B2 (ja) | 2013-07-17 |
CN101432550A (zh) | 2009-05-13 |
JPWO2007126084A1 (ja) | 2009-09-10 |
CN101432550B (zh) | 2012-05-02 |
EP2023012A4 (en) | 2009-12-30 |
EP2023012A1 (en) | 2009-02-11 |
US20090084212A1 (en) | 2009-04-02 |
EP2023012B1 (en) | 2017-06-07 |
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