CN106030155A - Ball screw device and method for attaching circulating member of ball screw device - Google Patents

Ball screw device and method for attaching circulating member of ball screw device Download PDF

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Publication number
CN106030155A
CN106030155A CN201580010206.5A CN201580010206A CN106030155A CN 106030155 A CN106030155 A CN 106030155A CN 201580010206 A CN201580010206 A CN 201580010206A CN 106030155 A CN106030155 A CN 106030155A
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CN
China
Prior art keywords
mentioned
nut
circulation member
ball
screw apparatus
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Pending
Application number
CN201580010206.5A
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Chinese (zh)
Inventor
黑岩大辅
大久保努
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NSK Ltd
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NSK Ltd
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Publication of CN106030155A publication Critical patent/CN106030155A/en
Pending legal-status Critical Current

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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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

A ball screw device (100) is provided with a screw shaft, a nut (101) threaded on the screw shaft with a plurality of balls interposed therebetween, a circulating member (103) for circulating the plurality of balls between the screw shaft and the nut, and a retaining member (107) for holding the circulating member (103) in the nut (101). A protrusion (125) having an arcuate cross-section is formed in the outer side of the circulating member (103) in an assembled state; the middle part of the retaining member (107) is a curved part (127) of which, in an assembled state, the outer-side surface protrudes radially outward, the inner-side surface is formed concave radially outward, and the cross-sectional shape as viewed from the axial direction of the nut (101) is formed in a substantially arcuate shape; and the protrusion (125) of the circulating member (103) and the curved part (127) of the retaining member (107) engage together.

Description

The installation method of the circulation member of ball-screw apparatus and ball-screw apparatus
Technical field
The present invention relates to move by equipment key elements such as device, processing equipment, precision positioning devices as such as weight The ball-screw apparatus used.
Background technology
As the mechanism converting rotational motion to linear motion, it is known to ball-screw apparatus.Figure 33 is to represent conventional The sectional view of structure of ball-screw apparatus.
Ball-screw apparatus 1101 includes the screw rod 1102 of linearity and cylindric nut 1103.Outside screw rod 1102 Side face, is formed with spiral helicine ball rolling groove 1104.At the inner peripheral surface of nut 1103, it is formed with the ball rolling with screw rod 1102 Dynamic groove 1104 relatively to spiral helicine ball rolling groove 1105.Nut 1103 is across being rollably clipped on two ball rolling grooves 1104, multiple balls 1106 between 1105 and be embedded in the outer circumferential side of screw rod 1102, by make screw rod 1102 rotate and can Make nut 1103 moving axially along screw rod 1102.
At the perisporium of nut 1103, it is provided with this perisporium the most through and loop embedding part (Japanese: the こ that formed ま；Reverser) installing hole 1107, it is embedded with the loop embedding part as circulation member at loop embedding part installing hole 1107 1108, this loop embedding part 1108 has the circulation road 1108a of the generally'S '-shaped for making ball 1106 circulate.Thus, it is clipped on Multiple balls 1106 between two ball rolling grooves 1104,1105, utilize holding portion and crossing screw rod of loop embedding part 1108 The piston ring land portion 1102a of 1102 is directed to ball circulation passage 1108a within loop embedding part 1108, via this ball circulation passage 1108a returns between two adjacent ball rolling grooves 1104,1105, thus ball 1106 circulates.By so at the perisporium of nut Possess the ball-screw apparatus of the type of the circulation member on the circulation road of the generally'S '-shaped having for making ball-recirculation, be referred to as anti- To device formula ball-screw apparatus or inner loop formula ball-screw apparatus.
In such reverser formula ball-screw apparatus or inner loop formula ball-screw apparatus, there is use sometimes In loop embedding part being held in nut the parts preventing loop embedding part from coming off from nut.Referring for example to Japanese Unexamined Patent Publication 2005-9624 publication (hereinafter referred to as patent documentation 1).
Figure 34 is the three-dimensional assembly diagram of the structure of the nut 1110 representing the ball-screw apparatus described in patent documentation 1. It addition, Figure 36 is the side view of the nut 1110 of the ball-screw apparatus described in patent documentation 1.As shown in figure 34, in patent In document 1, embedding cycle insert 1114 in being arranged at the through hole 1112 of perisporium of nut 1110, at loop embedding part 1114 Outside diameter configuration as the second insert 1116 of retaining member, this second insert 1116 is for by loop embedding part 1114 It is held in nut 1110 and prevents loop embedding part 1114 from coming off outward to the footpath of nut 1110.
In patent documentation 1, at the outer circumferential side of the perisporium of nut 1110, the pre-extension of tuning up along nut 1110 is formed For housing the accepting groove 1118 of the second insert 1116 as retaining member, it addition, in the two sides of accepting groove 1118 Bottom, extends along above-mentioned string and is formed with a pair groove 1120,1120.Second insert 1116 using a pair groove 1120,1120 as Guiding piece and insert the accepting groove 1118 of nut 1110 from the bearing of trend of above-mentioned string.
According to such structure, will be along bearing that the radial direction of nut 1110 comes off even if being applied with on loop embedding part 1114 Lotus, the second insert 1116 also can bear this load, and therefore, loop embedding part 1114 is held in nut by the second insert 1116 1110 such that it is able to prevent loop embedding part 1114 from coming off from nut 1110.
It addition, in Japanese Unexamined Patent Publication 2007-211898 publication (hereinafter referred to as patent documentation 2), describe utilize bonding Agent will be used for making the ball-screw apparatus of installing hole that the loop embedding part of ball-recirculation is held in nut.
Citation
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2005-9624 publication
Patent documentation 1: Japanese Unexamined Patent Publication 2007-211898 publication
Summary of the invention
The problem that invention is to be solved
Figure 35 is to represent the second insert 1116 in the ball-screw apparatus described in patent documentation 1 to nut 1110 The figure of the assemble method assembled, Figure 35 A represents that the situation that the external diameter of nut 1110 is little, Figure 35 B represent that the external diameter of nut 1110 is big Situation, Figure 35 C represents the situation that the external diameter of nut 1110 is bigger.It addition, the second insert 1116 is to the assembling of nut 1110 Carry out after loop embedding part 1114 is assembled into nut 1110.
In the case of the external diameter of nut 1110 is little, as shown in Figure 35 A, the second insert 1116 can be from nut 1110 Outer peripheral face side is readily inserted into accepting groove 1118 along the bearing of trend of above-mentioned string via guiding groove 1120,1120 such that it is able to Easily the second insert 1116 is configured at the precalculated position of the outside diameter of loop embedding part 1114.
But, in the case of the external diameter of nut 1110 is big, need the accepting groove 1118 by nut 1110 side to be formed greatly. It is to say, need to be formed deeply by accepting groove 1118 and guiding groove 1120,1120.So, as shown in Figure 35 B, it is difficult to Second insert 1116 is navigated to the precalculated position of the outside diameter of loop embedding part 1114.Bigger at the external diameter of nut 1110 In the case of, need to deepen further accepting groove 1118, but, as shown in Figure 35 C, the only periphery at through hole 1112 is formed and houses Groove 1118 and guiding groove 1120,1120, insert accepting groove 1118 by the second insert 1116 in vertical direction, touching receipts It is allowed under the state of the bottom of tank 1118 slide along the bearing of trend of above-mentioned string and be arranged in predetermined by the second insert 1116 Position.Even if in this case, it is also difficult to the second insert 1116 to be navigated to the outside diameter of loop embedding part 1114 Precalculated position.So, due to the size of nut 1110, loop embedding part 1114 and the second insert 1116 can be caused to nut The assembling of 1110 is bothersome.
It addition, as shown in figure 34, in the loop embedding part 1114 of patent documentation 1, it is formed in the mounted state upper State the protuberance 1117,1117 of a pair fin-shaped prominent round about on the bearing of trend of string.On the other hand, such as Figure 36 institute Show, at nut 1110, the part of the through hole 1112 being connected with accepting groove 1118 and on the direction that above-mentioned string extends relative to Inwall is formed with a pair groove portion 1119,1119.Each groove portion 1119 opens to accepting groove 1118 at the outer peripheral face side end of nut 1110 Put, at the inner peripheral surface side end-enclosed of nut 1110.When assembling loop embedding part 1114, the protuberance 1117 of a pair fin-shaped, 1117 are sticked in a pair groove portion 1119,1119, thus prevent loop embedding part 1114 from falling into the internal side diameter of nut 1110, and enter Row loop embedding part 1114 determines relative to the phase place of nut 1110.
But, at the ball-screw apparatus of patent documentation 1, carrying out loop embedding part 1114 relative to nut 1110 Second insert 1116 is assembled into nut after determining by phase place, so, loop embedding part 1114 and the second insert 1116 Assemble bothersome.
It addition, ball-screw apparatus conventional as patent documentation 2, until bonding agent solidification needs about 24 little Time time of growing like that, so, there is manufacturing time length, bothersome problem.
The present invention completes in view of such situation, and its problem is to provide can be by circulation member be used for following Ring component is held in the holding member of nut so that the mode that can prevent circulation member from coming off from nut is assembled easily into spiral shell The ball-screw apparatus of mother, the circulation member installation method of ball-screw apparatus.
For solving the means of problem
In order to reach above-mentioned problem, the ball-screw apparatus of the present invention has: the screw rod that linearity extends, this screw rod is outside Side face is formed with spiral helicine groove；Nut, this nut inner peripheral surface have relative with the spiral helicine groove of above-mentioned screw rod to spiral shell The groove of rotation shape；And multiple ball, the plurality of ball can rollably be configured at the spiral helicine groove of above-mentioned screw rod and above-mentioned spiral shell Between female spiral helicine groove；Above-mentioned nut is embedded in above-mentioned screw rod across above-mentioned multiple balls, has for making above-mentioned multiple The circulation member that ball circulates between the groove and the groove of above-mentioned nut of above-mentioned screw rod, than above-mentioned circulation member by footpath outward It is configured with the holding member for above-mentioned circulation member being held in above-mentioned nut；It is characterized in that, above-mentioned circulation member has The above-mentioned circulation member limiting unit in movement radially is limited by being contacted with above-mentioned nut；In order to keep above-mentioned circulation portions Part, is provided with the engaging machine for engaging above-mentioned circulation member and above-mentioned holding member at above-mentioned circulation member and above-mentioned holding member Structure.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned snap fastener is to be formed in the assembled state In the protuberance in face of outside diameter of above-mentioned circulation member and be formed at above-mentioned holding member and engage with above-mentioned protuberance Curved face part.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned protuberance is in the assembled state axially The ridge extended.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned protuberance is Part-spherical.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned holding member is formed by metal material.
It is further preferred, that in the ball-screw apparatus of the present invention, blocked mutually with above-mentioned curved face part by above-mentioned protuberance Close and carry out the above-mentioned holding member location relative to above-mentioned circulation member.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned circulation member is fixed on above-mentioned nut, it Rear above-mentioned snap fastener engages, thus above-mentioned holding member is fixed in above-mentioned nut.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned snap fastener includes shape in the assembled state Become the first ridge and second ridge in the face of the outside diameter of above-mentioned circulation member and be formed at above-mentioned holding member and with upper State the first groove portion that the first ridge fastens and the second groove portion composition fastened with above-mentioned second ridge.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned first ridge and above-mentioned first groove portion are in group The direction extended at the predetermined string of above-mentioned nut under dress state extends.
It is further preferred, that in the ball-screw apparatus of the present invention, at the perisporium of above-mentioned nut, be formed in collecting State the accepting groove of holding member；The outer edge in the face that above-mentioned first ridge has the above-mentioned outside diameter than above-mentioned circulation member enters one The protuberance that step is prominent outward；Above-mentioned limiting unit is above-mentioned protuberance, by the face of the internal side diameter of above-mentioned protuberance with above-mentioned The bottom surface of accepting groove contacts and limits the movement that above-mentioned circulation member is inwardly square to footpath relative to above-mentioned nut.
It is further preferred, that in the ball-screw apparatus of the present invention, the face of the above-mentioned internal side diameter of above-mentioned protuberance is with upper The face of the above-mentioned outside diameter stating circulation member is formed at grade.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned second ridge and above-mentioned second groove portion are in group Axially extending at above-mentioned nut under dress state.
It is further preferred, that in the ball-screw apparatus of the present invention, by above-mentioned first ridge and above-mentioned first groove portion Fasten and carry out above-mentioned circulation member and determine relative to the phase place of above-mentioned nut.
It is further preferred, that in the ball-screw apparatus of the present invention, by above-mentioned second ridge and above-mentioned second groove portion Fasten and carry out the above-mentioned holding member location relative to above-mentioned circulation member.
It is further preferred, that in the ball-screw apparatus of the present invention, at above-mentioned nut and above-mentioned holding member, be provided with For by above-mentioned holding member engaging in the locking mechanism of above-mentioned nut.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned locking mechanism is formed at being arranged at above-mentioned The perisporium of nut and house above-mentioned holding member accepting groove locking groove and be formed at above-mentioned holding member and with above-mentioned card Determine the locking ridge that groove fastens.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned locking mechanism is formed at being arranged at above-mentioned The perisporium of nut and house above-mentioned holding member accepting groove tapered portion and be formed at above-mentioned holding member and with above-mentioned receipts The tapered portion that the above-mentioned tapered portion of tank fastens.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned holding member is by resin formation.
It is further preferred, that in the ball-screw apparatus of the present invention, at above-mentioned nut, be formed for installing above-mentioned The installing hole of circulation member；The fixing above-mentioned circulation member being inserted into above-mentioned installing hole of above-mentioned holding member；Above-mentioned restriction Portion is formed at above-mentioned circulation member, engaging in above-mentioned nut to limit the pawl of the above-mentioned circulation member movement to radial outside Portion；Above-mentioned snap fastener includes being formed at above-mentioned circulation member and for installing the holding section of above-mentioned holding member and being formed In above-mentioned holding member and the engaged part of the above-mentioned holding section being sticked in above-mentioned circulation member；The above-mentioned installing hole of above-mentioned nut There is hole portion and the countersink region that can be fitted together to above-mentioned circulation member, be installed on above-mentioned holding section upper of above-mentioned circulation member State holding member and be connected to this countersink region to limit the movement to radially inner side of the above-mentioned circulation member.
It is further preferred, that in the ball-screw apparatus of the present invention, the above-mentioned holding section of above-mentioned circulation member includes setting It is placed in the axle portion of the outer aspect of above-mentioned circulation member and thicker than above-mentioned axle portion and be arranged at the head on top in above-mentioned axle portion； The outer aspect of above-mentioned circulation member is positioned at the radial outside of above-mentioned nut when above-mentioned circulation member has been installed on above-mentioned nut, on State the opening that the above-mentioned engaged part of holding member includes being sticked in the above-mentioned holding section of above-mentioned circulation member.
It is further preferred, that in the ball-screw apparatus of the present invention, above-mentioned holding member sinks the above-mentioned of above-mentioned nut Elastic deformation between hole portion and the above-mentioned head of above-mentioned circulation member and to the radial outside of above-mentioned nut to above-mentioned circulation member Force.
It is further preferred, that in the ball-screw apparatus of the present invention, the above-mentioned outer aspect of above-mentioned circulation member is formed as Long Circle；Above-mentioned holding member includes rectangular plate-shaped member, outside the length of length direction than above-mentioned circulation member is above-mentioned The length of the width of aspect is long.
It is further preferred, that in the ball-screw apparatus of the present invention, the length ratio of the length direction of above-mentioned holding member The length of the length direction of the above-mentioned outer aspect of above-mentioned circulation member is short, above-mentioned than above-mentioned circulation member of the length of width The length of the width of outer aspect is short.
It is further preferred, that in the ball-screw apparatus of the present invention, in the above-mentioned outer aspect of above-mentioned circulation member, shape Become and have the groove portion extended at width；Above-mentioned holding member is received in above-mentioned groove portion, thus limits above-mentioned holding member with above-mentioned Rotate centered by holding section.
It is further preferred, that in the ball-screw apparatus of the present invention, at the above-mentioned outer aspect of above-mentioned circulation member, Formation peak, the both sides portion in above-mentioned groove portion；The top in above-mentioned peak portion is in the length side of the above-mentioned outer aspect relative to above-mentioned circulation member Extend to the direction tilted and be parallel to each other.
It is further preferred, that in the ball-screw apparatus of the present invention, the above-mentioned hole portion of above-mentioned nut and above-mentioned countersink region It is concentric；Above-mentioned hole portion is the oblong through hole that can be fitted together to above-mentioned circulation member；Above-mentioned countersink region is circular and diameter ratio The length of the length direction of above-mentioned holding member is big.
It is further preferred, that the circulation member installation method of the ball-screw apparatus of the present invention, by above-mentioned circulation member from Radially inner side is inserted in the above-mentioned installing hole of above-mentioned nut；Above-mentioned holding member is inserted in the upper of above-mentioned nut from radial outside State installing hole and be installed on above-mentioned circulation member.
It is further preferred, that the circulation member installation method of the ball-screw apparatus of the present invention, above-mentioned holding member is pacified It is loaded on above-mentioned circulation member, so that the length direction of the above-mentioned outer aspect of above-mentioned circulation member and the length side of above-mentioned holding member To unanimously；Above-mentioned circulation member is inserted in from radially inner side the above-mentioned installing hole of above-mentioned nut；Make more than above-mentioned holding member Rotate, so that the length direction of the above-mentioned outer aspect of above-mentioned circulation member is with above-mentioned centered by stating the above-mentioned holding section of circulation member The length direction of holding member is orthogonal.
Invention effect
Can be by circulation member be used for being held in circulation member the holding member of nut in accordance with the invention it is possible to provide So that circulation member can be prevented to be assembled easily into the ball-screw apparatus of nut, ball-screw dress from the mode that nut comes off The circulation member installation method put.
Accompanying drawing explanation
Fig. 1 is the three-dimensional assembly diagram of the nut of the ball-screw apparatus of the first embodiment.
Fig. 2 A is the figure that the circulation member of the ball-screw apparatus of the first embodiment is observed in the inner circumferential side from nut, Fig. 2 B Being the B-B direction view of Fig. 2 A, Fig. 2 C is the C-C direction view of Fig. 2 A, and Fig. 2 D is the D-D direction view of Fig. 2 C, and Fig. 2 E is Fig. 2 D E-E direction view.
Fig. 3 A is the figure that the retaining member of the ball-screw apparatus of the first embodiment is observed in the inner circumferential side from nut, Fig. 3 B Being the B-B direction view of Fig. 3 A, Fig. 3 C is the C-C direction view of Fig. 3 A, and Fig. 3 D is the D-D direction view of Fig. 3 C, and Fig. 3 E is Fig. 3 D E-E direction view.Fig. 3 is 5 views of the retaining member of the ball-screw apparatus of the first embodiment.
Fig. 4 is the front view of the nut of the ball-screw apparatus from end on observation the first embodiment.
Fig. 5 is the side view of the nut of the ball-screw apparatus observing the first embodiment from external diameter direction.
Fig. 6 A, 6B be respectively the 6-6 of Fig. 5 to regarding sectional view, Fig. 6 A represents that circulation member and retaining member are assembled in nut State, Fig. 6 B represents the state of unassembled circulation member and retaining member.
Fig. 7 is the assemble method representing and assembling retaining member in the ball-screw apparatus of the first embodiment to nut Figure.
Fig. 8 is the three-dimensional assembly diagram of the nut of the ball-screw apparatus of the second embodiment.
Fig. 9 A is the figure that the circulation member of the ball-screw apparatus of the second embodiment is observed in the inner circumferential side from nut, Fig. 9 B Being the B-B direction view of Fig. 9 A, Fig. 9 C is the C-C direction view of Fig. 9 A, and Fig. 9 D is the D-D direction view of Fig. 9 C, and Fig. 9 E is Fig. 9 D E-E direction view.
Figure 10 A, 10B are figure corresponding with Fig. 6 A, 6B of the first embodiment in this second embodiment respectively, figure 10A represents that circulation member and retaining member are assembled in the state of nut, and Figure 10 B represents unassembled circulation member and retaining member State.
Figure 11 is the three-dimensional assembly diagram of the nut of the ball-screw apparatus of the 3rd embodiment.
Figure 12 A is the figure of the circulation member of the ball-screw apparatus observing the 3rd embodiment from the inner circumferential side of nut, figure 12B is the B-B direction view of Figure 12 A, and Figure 12 C is the C-C direction view of Figure 12 A, and Figure 12 D is the D-D direction view of Figure 12 C, figure 12E is the E-E direction view of Figure 12 D.
Figure 13 A-E is 5 views of the retaining member of the ball-screw apparatus of the 3rd embodiment, and Figure 13 A is from nut Inner circumferential side observe the figure of retaining member of ball-screw apparatus of the 3rd embodiment, Figure 13 B is that the B-B of Figure 13 A is to regarding Figure, Figure 13 C is the C-C direction view of Figure 13 A, and Figure 13 D is the D-D direction view of Figure 13 C, and Figure 13 E is that the E-E of Figure 13 D is to regarding Figure.
Figure 14 is the front view of the nut of the ball-screw apparatus from end on observation the 3rd embodiment.
Figure 15 is the side view of the nut of the ball-screw apparatus observing the 3rd embodiment from external diameter direction.
Figure 16 is the side view of the nut of the ball-screw apparatus observing the 3rd embodiment from external diameter direction, represents one The through hole of side assembles the state of circulation member.
Figure 17 A, 17B be respectively the 17-17 of Figure 15 to regarding sectional view, Figure 17 A represents that circulation member and retaining member assemble In the state of nut, Figure 17 B represents the state of unassembled circulation member and retaining member.
Figure 18 is the assemble method representing and assembling retaining member in the ball-screw apparatus of the 3rd embodiment to nut Figure.
Figure 19 is the three-dimensional assembly diagram of the nut of the ball-screw apparatus of the 4th embodiment.
Figure 20 A is the figure of the retaining member of the ball-screw apparatus observing the 4th embodiment from the inner circumferential side of nut, figure 20B is the B-B direction view of Figure 20 A, and Figure 20 C is the C-C direction view of Figure 20 A, and Figure 20 D is the D-D direction view of Figure 20 C, figure 20E is the E-E direction view of Figure 20 D.
Figure 21 is the side view of the nut of the ball-screw apparatus observing the 4th embodiment from external diameter direction.
Figure 22 A, 22B be the 22-22 of Figure 21 to regarding sectional view, Figure 22 A represents that circulation member and retaining member are assembled in spiral shell Female state, Figure 22 B represents the state of unassembled circulation member and retaining member.
Figure 23 is the assemble method representing and assembling retaining member in the ball-screw apparatus of the 4th embodiment to nut Figure.
Figure 24 A is the partial sectional view of the structure of the ball-screw apparatus of the 5th embodiment representing the present invention, Figure 24 B Being the figure observing circulation member in nut from radial outside, Figure 24 C is the C-C sectional view of Figure 24 B, and Figure 24 D is Figure 24 C Enlarged drawing.
Figure 25 A, 25B, 25C and 25D are shown respectively the structure of circulation member, and Figure 25 A is outside drawing, and Figure 25 B is from downside The figure of the circulation member observing Figure 25 A i.e. represents the figure of interior aspect, and Figure 25 C is side view, and Figure 25 D is to observe Figure 25 A from upside The figure of circulation member i.e. represent the figure of outer aspect.
Figure 26 is the figure of the installing hole observing nut from radial outside.
Figure 27 A, 27B, 27C and 27D are shown respectively the structure of secure component, and Figure 27 A is the side view of length direction, figure 27B is the side view of width, and Figure 27 C is front view, and Figure 27 D is the side view of the width of the opposition side of Figure 27 B.
Figure 28 A, 28B represent the appearance that circulation member to be installed in the 5th embodiment nut, and Figure 28 A is to represent Circulation member to insert the figure of the appearance of the installing hole of nut, and Figure 28 B represents and secure component is installed to circulation member The figure of appearance.
Figure 29 A, 29B and 29C represent that the circulation member being installed on nut, Figure 29 A are the figures observed from radial outside, figure 29B is the figure observed from radially inner side, and Figure 29 C is the sectional view observed from side.
Figure 30 A is the partial sectional view of the structure of the ball-screw apparatus of the 6th embodiment representing the present invention, Figure 30 B Being the figure observing circulation member in nut from radial outside, Figure 30 C is the C-C sectional view of Figure 30 B, and Figure 30 D is Figure 30 C Enlarged drawing.
Figure 31 A, 31B and 31C represent that secure component has installed to the appearance of circulation member, Figure 31 A in the 6th embodiment Being the figure representing outer aspect, Figure 31 B is side view, and Figure 30 C is the figure of the modified example representing outer aspect.
Figure 32 A, 32B represent the appearance making the secure component having installed to circulation member in the 6th embodiment rotate, Figure 32 A Be the figure before representing rotation, Figure 32 B be to represent postrotational figure.
Figure 33 is the sectional view of the structure representing conventional ball-screw apparatus.
Figure 34 is the three-dimensional assembly diagram of the structure of the nut representing conventional ball-screw apparatus.
Figure 35 A, 35B and 35C are the assemblings representing and assembling the second insert in conventional ball-screw apparatus to nut The figure of method, Figure 35 A represents that the situation that the external diameter of nut is little, Figure 35 B represent that the situation that the external diameter of nut is big, Figure 35 C represent spiral shell The situation that female external diameter is bigger.
Figure 36 is the side view of the nut 110 of conventional ball-screw apparatus.
Detailed description of the invention
(the first embodiment)
Referring to the drawings the first embodiment of the ball-screw apparatus of the present invention is illustrated.
First, the direction of the component parts of the ball-screw apparatus in this specification is defined.In this manual, As long as no particularly explanation, the direction of the component parts of ball-screw apparatus, with ball-screw, i.e. as being formed at nut Axial, the most identical involved by the female thread of ball rolling groove.
Fig. 1 is the three-dimensional assembly diagram of the nut 101 of the ball-screw apparatus 100 of present embodiment.
The ball-screw apparatus 100 of present embodiment is inner loop formula ball-screw apparatus, has and is formed at outer peripheral face There is the screw rod (omitting diagram) of the linearity of spiral helicine ball rolling groove (omission diagram) and be formed at inner peripheral surface and be somebody's turn to do The ball rolling groove of screw rod relatively to the cylindric nut of spiral helicine ball rolling groove 137 (with reference to Fig. 4 described later) 101, this nut 101 is embedded in spiral shell across the multiple balls (omitting diagram) being rollably clipped between two ball rolling grooves The outer circumferential side of bar, can make nut moving axially along screw rod by making screw rod rotate.It addition, about ball-screw apparatus 100 Screw rod and ball, owing to being the structure identical with conventional ball-screw apparatus, so, in this manual, omit diagram Detailed description with structure.
As it is shown in figure 1, the ball-screw apparatus 100 of present embodiment has the loop embedding part, i.e. being assembled into nut 101 Circulation member 103.Utilize circulation member 103, be clipped on ball rolling groove (omitting diagram) and the nut of screw rod (omitting diagram) Multiple balls (omitting diagram) between the ball rolling groove 137 of 101 return and follow between two adjacent ball rolling grooves Ring.The through hole 105 being radially formed through from the lateral inner peripheral surface side of outer peripheral face it is provided with at nut 101.The section shape of through hole 105 Becoming circular, circulation member 103 is assembled in through hole 105.
As it is shown in figure 1, the ball-screw apparatus 100 of present embodiment has retaining member 107, this retaining member 107 is used In the circulation member 103 being assembled in through hole 105 being held in nut 101 and preventing circulation member 103 outside to footpath from nut 101 Side comes off.As described later, retaining member 107 and circulation member 103 are configured at the outside diameter of circulation member 103 contiguously.
Retaining member 107 is the plate-shaped member of the rectangle formed by metal parts such as steel, wherein, is being assembled in nut Under the state of 101, using the pre-bearing of trend tuned up of nut 101 as the longest limit of length direction, using nut 101 axial as Width i.e. minor face.Here, in this manual, " string " refers in the string of the pitch circle of the female thread of nut 101 and through hole The string that the central axis of 105 is orthogonal.
In the outer circumferential side part of the perisporium of nut 101, it is formed with predetermined axial width for housing retaining member 107 Accepting groove 111.Accepting groove 111 is to cross through hole 105 and the week of the through nut of bearing of trend 101 at string at the bearing of trend of string The outer circumferential side part of wall and formed.Accepting groove 111, its bottom surface extends along direction that string extends and is formed, axial from nut 101 The section shape observed is formed as using the outer peripheral edge of nut 101 as the part circular of circular arc, is in other words formed as arch.At bow The bottom of the two sides of the accepting groove 111 of shape, along accepting groove 111 bottom surface extend be formed in the axial direction of nut 101 to A pair locking groove 113,113 of rightabout depression.Retaining member 107 as described later, is being inserted by a pair locking groove 113,113 Play a role as guiding piece during the accepting groove 111 of arch.
Fig. 2 is 5 views of the circulation member 103 of present embodiment.In fig. 2, Fig. 2 A is in the assembled state from spiral shell The figure that the inner circumferential side of female 101 is observed.Fig. 2 B is the B-B direction view of Fig. 2 A.Fig. 2 C is the C-C direction view of Fig. 2 A.Fig. 2 D is figure The D-D direction view of 2C.Fig. 2 E is the E-E direction view of Fig. 2 D.It addition, the horizontal direction i.e. paper left and right directions in Fig. 2 A is spiral shell Mother's 101 is axial, and vertical direction i.e. paper above-below direction is circumference or the bearing of trend of string of nut 101.
As shown in each figure of Fig. 2, circulation member 103 is shaped generally as discoid, the side as face side in Fig. 2 A Face 119 towards nut 101 inner circumferential side configure.In the face 119 of the inner circumferential side of circulation member 103, it is formed as making The circulation road 115 of the groove of not shown ball-recirculation.Circulation road 115 as shown in Figure 2 A, generally circumferentially extending along nut 101, It is shaped generally as S-shaped.The side of the upper and lower sides in the circumferential two sides of circulation member 103, i.e. Fig. 2 A, was respectively arranged with in week To the protuberance 117,117 of a pair fin-shaped being protrudedly formed to opposition side.As shown in Figure 2 A, see from the inner circumferential side of nut 101 The shape of the protuberance 117 of each fin-shaped observed be tip side be the arc-shaped of semicircle.
The shape of the protuberance 117 of each fin-shaped observed from the bearing of trend of string, as shown in Figure 2 B, for substantially rectangular. It addition, from end on observation to the shape of circulation member 103, as shown in Figure 2 C, be formed as the face of the inner circumferential side of circulation member 103 119 is concave shape.This concave surface becomes planar in the cylinder concentric with nut 101.It addition, each protuberance observed from the direction 117 be shaped so as to rectangle.It addition, as shown in Fig. 2 B～2E, the face 123 of the outside diameter of circulation member 103 is plane.Each prominent The face of the outside diameter going out portion 117 is disposed on the same plane with this face 123.
In the present embodiment, as shown in Fig. 2 B～2E, at the central part in the face 123 of circulation member 103, be formed to And the ridge 125 that axially extend the most prominent to footpath under the assembled state that nut 101 assembles.Seeing from axial of ridge 125 The section shape examined is formed as arc-shaped.
Fig. 3 is 5 views of the retaining member 107 of present embodiment.In figure 3, Fig. 3 A is the inner circumferential side from nut 101 The figure observed.Fig. 3 B is the B-B direction view of Fig. 3 A.Fig. 3 C is the C-C direction view of Fig. 3 A.Fig. 3 D is that the D-D of Fig. 3 C is to regarding Figure.Fig. 3 E is the E-E direction view of Fig. 3 D.It addition, the horizontal direction i.e. paper left and right directions in Fig. 3 A is the axial of nut 101, Vertical direction i.e. paper above-below direction is circumference or the bearing of trend of string of nut 101.
As shown in Fig. 3 A, Fig. 3 D, retaining member 107 is substantially rectangular, at the both ends of a pair long side edge, and shape respectively Become the ridge having extending under the assembled state that nut 101 assembles to axially projecting and along retaining member 107 length direction 109、109.It addition, as shown in Figure 3 C, the length direction central part of retaining member 107 becomes curved face part 127.Curved face part 127 shape Become, when being assembled in nut 101, highlighting outward towards footpath of outside diameter, internal side diameter towards footpath outward Depression, is substantially arc-shaped from the section shape of end on observation.Curved face part 127 is in the axially extending formation of nut 101, curved face part The circular shape of 127 is formed as so that the curvature in the face of internal side diameter is the size chimeric with the ridge 125 of circulation member 103.By It is such structure in retaining member 107, thus from the shape of the bearing of trend observation of string as shown in Fig. 3 B, Fig. 3 E, for substantially T Font.
Fig. 4 is the front view from end on observation nut 101.As shown in Figure 4, at the central part of nut 101, it is formed along spiral shell The axle center of female 101 extends, is used for inserting the hole 135 of not shown screw rod.Hole 135 is whole axial with roughly the same internal diameter shape Become.At the inner peripheral surface in hole 135, it is formed with spiral helicine ball rolling groove 137.
In the present embodiment, as shown in Figure 4, through hole 105 arranges two on 180 ° of ground of circumferentially spaced of nut 101.Respectively Through hole 105 extends to outside diameter from the internal side diameter of nut 101, open at the accepting groove 111 of arch.Each through hole 105, as with The part that accepting groove 111 is connected, on the bearing of trend of string relative to inwall, be formed on the bearing of trend of string to phase A pair groove portion 139,139 that opposite direction depression is formed.Each groove portion 139, at the outer peripheral face side end of nut 101, to accepting groove 111 Interior opening, in the inner peripheral surface side end of nut 101, forms the end face 141 parallel with the bottom surface of accepting groove 111 and is closed.? In groove portion 139,139, house the protuberance 117,117 of a pair fin-shaped of circulation member 103 respectively.By making the prominent of a pair fin-shaped Going out portion 117,117 and be sticked in a pair groove portion 139,139, circulation member 103 is limited to spiral shell when being assembled in through hole 105 The movement of the internal side diameter of female 101 and the rotation relative to nut 101.
Fig. 5 is the side view of the nut 101 of the ball-screw apparatus observing the first embodiment from external diameter direction.Such as Fig. 5 Shown in, the through hole 105 of a side, the side that keeps left in the direction facing Fig. 5 is formed.The through hole 105 of the opposing party, in the circumference of nut 101 The upper through hole 105 with a side separates 180 ° of ground and is formed, and is formed on the right side in the direction facing Fig. 5.It is to say, the through hole of a side 105 and the through hole 105 of the opposing party formed with axially offsetting.
Fig. 6 be the 6-6 of Fig. 5 to regarding sectional view, Fig. 6 A represents that circulation member 103 and retaining member 107 are assembled in nut The state of 101, Fig. 6 B represents unassembled circulation member 103 and the state of retaining member 107.
As shown in Fig. 6 A, 6B, groove portion 139 is the inwall making through hole 105 caves in rectangular in form and shape at the bearing of trend of string Become.It addition, as shown in Figure 6A, be assembled in the circulation member 103 of through hole 105 outside diameter face 123 be assembled in accepting groove The face of the internal side diameter of the retaining member 107 of 111 contacts.It addition, the ridge 109,109 of retaining member 107 is sticked in respectively In the locking groove 113,113 that the bottom of the two sides of accepting groove 111 is formed.
Then, the assemble method assembling circulation member 103 and retaining member 107 to nut 101 is illustrated.Circulation portions Part 103 and retaining member 107 are to the assembling of nut 101, shown in Fig. 1, first circulation member 103 are assembled into the logical of nut 101 Hole 105, is then assembled into accepting groove 111 by retaining member 107.
When assembling circulation member 103 to through hole 105, circulation member 103 is radially oriented from the radial outside of nut 101 Interior side inserts through hole 105.Then, by making a pair protuberance 117,117 of circulation member 103 be sticked in a pair of through hole 105 Groove portion 139,139, and circulation member 103 is positioned in through hole 105.Now, the face 119 of the inner circumferential side of circulation member 103 with The inner peripheral surface of nut 101 is positioned on the same face.It addition, be formed at ridge 125 edge in the face 123 of the outside diameter of circulation member 103 It is configured in through hole 105 axially extendingly.
About retaining member 107 to the assembling of accepting groove 111, it is illustrated two kinds of assemble methods in the figure 7.First, One method is the side of the bearing of trend slip of the string making retaining member 107 extend at accepting groove 111 from the outer peripheral face side of nut 101 Method.The method is as follows: is inserted into the end of the both sides ridge 109,109 of retaining member 107 and is formed in the side of accepting groove 111 The end of a pair locking groove 113,113, and make retaining member 107 along the bottom surface of accepting groove 111 at string with keeping intact Bearing of trend slides.Now, a pair locking groove 113,113 fastens with ridge 109,109, guides the insertion of retaining member 107. Then, when a square end portion of retaining member 107 arrives the ridge 125 of circulation member 103, in retaining member 107, this square end Ridge 125 is crossed in portion, the part elastic deformation abutted with ridge 125, and retaining member 107 is while before the bearing of trend of string Enter.When the curved face part 127 of retaining member 107 arrives ridge 125, curved face part 127 engages with ridge 125.Specifically, ridge 125 internal side diameters being sticked in curved face part 127.Thus, retaining member 107 is located in precalculated position.So, circulation member is completed 103 and retaining member 107 to the assembling of nut 101.
It addition, second method is following method: from the outer peripheral face side of nut 101, relative to the bottom surface of accepting groove 111 greatly Cause vertical direction retaining member 107 to be pressed in accepting groove 111, then make retaining member 107 along the bottom surface of accepting groove 111 Bearing of trend at string slides.In the method, first, from the radial outside and slightly of the circulation member 103 being assembled in nut 101 Slightly the position at the center of deviation nut 101, is pressed into collecting in vertical direction by retaining member 107 towards the bottom surface of accepting groove 111 In groove 111.Then, when retaining member 107 arrive the bottom surface of accepting groove 111, the ridge 109,109 of retaining member 107 is sticked in During a pair locking groove 113,113, next in the same manner as above-mentioned first method, make retaining member 107 along the end of accepting groove 111 Slide at the bearing of trend of string in face.Now, a pair locking groove 113,113 fastens with ridge 109,109, guides retaining member The insertion of 107.Then, in the same manner as above-mentioned first method, make retaining member 107 slide, until the curved face part of retaining member 107 Till 127 engage with the ridge 125 of circulation member 10.Thus, retaining member 107 is located in precalculated position.So, complete to follow Ring component 103 and retaining member 107 are to the assembling of nut 101.
As it has been described above, according to present embodiment, it is possible to the anticreep of nut 101 outside diameter of circulation member 103 will be configured at Parts 107 are easily configured to precalculated position.As a result, it is possible to alleviate, circulation member 103 and retaining member 107 are assembled into nut The workload of 101, it is possible to realize the reduction of manufacturing cost.It addition, according to present embodiment, even if the external diameter of nut is big, pass through Method illustrated in Fig. 7, it is also possible to retaining member 107 is easily configured to precalculated position.
Additionally, according to present embodiment, although it is delivered to circulation portions via not shown ball from the inner circumferential side of nut 101 The load of part 103 is delivered to retaining member 107, but, owing to retaining member 107 is to insert circulation portions from to through hole 105 Direction that the direction of insertion of part 103 is different, i.e. bearing of trend from the string of nut 101 are inserted into nut 101, so, will not The problem that retaining member 107 comes off because of the load in circulation member 103 direction to be come off occurs.That is, due to ridge 109,109 It is sticked in the locking groove 113,113 of the accepting groove 111 extended in the direction that string extends, it is thus possible to prevent retaining member 107 from spiral shell Female 101 to footpath coming off outward.Therefore, it is possible to prevent circulation member 103 from coming off.
So, according to present embodiment, it is possible to without difficultyly by circulation member 103 be used for keeping circulation member 103 Retaining member 107 in nut 101 is easily assembled in nut 101, so that can prevent circulation member 103 from taking off from nut 101 Fall.
(the second embodiment)
Then, the second embodiment of the ball-screw apparatus of the present invention is illustrated.
Fig. 8 is the three-dimensional assembly diagram of the nut 101 of the ball-screw apparatus 200 of the second embodiment.Implement about second The ball-screw apparatus 200 of mode, illustrates centered by the structure different from the first embodiment, and implements with first The explanation that the incomplete structure that mode is identical repeats.It addition, to the parts identical with the first embodiment, use identical accompanying drawing mark Note illustrates.The ball-screw apparatus 200 of the second embodiment, as shown in Figure 8, is the structure and first of circulation member 203 The example that embodiment is different.Other structures are identical with the first embodiment.
Fig. 9 is 5 views of the circulation member 203 of the ball-screw apparatus 200 of the second embodiment.In fig .9, Fig. 9 A It it is the figure observed from the inner circumferential side of nut 101 in the assembled state.Fig. 9 B is the B-B direction view of Fig. 9 A.Fig. 9 C is Fig. 9 A C-C direction view.Fig. 9 D is the D-D direction view of Fig. 9 C.Fig. 9 E is the E-E direction view of Fig. 9 D.It addition, the level side in Fig. 9 A Being the axial of nut 101 to i.e. paper left and right directions, vertical direction i.e. paper above-below direction is circumference or the string of nut 101 Bearing of trend.
As shown in each figure of Fig. 9, in this second embodiment, in the central authorities in face 223 of outside diameter of circulation member 203 Portion, is formed with the protuberance 245 at substantially Part-spherical the most prominent to footpath under the assembled state that nut 101 assembles.Follow Other structures of ring component 203 are identical with the first embodiment.
Figure 10 A, 10B are figure corresponding with Fig. 6 A, 6B of the first embodiment in the second embodiment respectively, Figure 10 A Representing that circulation member 203 and retaining member 107 are assembled in the state of nut 101, Figure 10 B represents unassembled circulation member 203 He The state of retaining member 107.
As shown in Figure 10 A, the face 223 of the outside diameter of the circulation member 203 of through hole 105 and the receipts being assembled in arch it are assembled in The face of the internal side diameter of the retaining member 107 of tank 111 contacts.It addition, the ridge 109,109 of retaining member 107 engages respectively In the locking groove 113,113 that the bottom of the two sides at accepting groove 111 is formed.It addition, the protuberance 245 of circulation member 203 engages Curved face part 127 in retaining member 107.So, in this second embodiment, the protuberance 245 of circulation member 203 is sticked in anticreep Curved face part 127 this point of parts 107 is different from the first embodiment.
The assemble method from retaining member 107 to accepting groove 111 and the first embodiment phase that assemble in second embodiment With (with reference to Fig. 7).In this second embodiment, in above-mentioned first method and second method, as long as making retaining member 107 edge The bottom surface accepting groove 111 is moved until the curved face part 127 of retaining member 107 is sticked in the protuberance 245 of circulation member 203 i.e. Can.
So, in this second embodiment, in the same manner as the first embodiment, it is possible to circulation member 203 will be configured at The retaining member 107 of outside diameter is easily configured to precalculated position.As a result, it is possible to alleviate circulation member 203 and retaining member 107 workloads being assembled into nut 101, it is possible to realize the reduction of manufacturing cost.It addition, in the present embodiment, even if nut The external diameter of 101 is big, also in the same manner as the first embodiment, it is possible to retaining member 107 is easily configured to precalculated position.
It addition, the most similarly, although transmit from the inner circumferential side of nut 101 via not shown ball Load to circulation member 203 is delivered to retaining member 107, but, owing to retaining member 107 is to insert from to through hole 105 Enter the different direction of the direction of insertion of circulation member 203, i.e. bearing of trend from the string of nut 101 and be inserted into nut 101, institute With, do not have the problem that retaining member 107 comes off because of the load in circulation member 203 direction to be come off.That is, due to ridge 109,109 it is sticked in the locking groove 113,113 of accepting groove 111 extended in the direction that string extends, it is thus possible to prevent retaining member 107 from nut 101 to footpath coming off outward.Therefore, it is possible to prevent circulation member 203 from coming off.
So, according to present embodiment, it is possible to be held in spiral shell by circulation member 203 with by circulation member 203 without difficultyly The retaining member 107 of female 101 is easily assembled in nut 101, so that can prevent circulation member 203 from coming off from nut 101.
(the 3rd embodiment)
Then, the 3rd embodiment of the ball-screw apparatus of the present invention is illustrated.
Figure 11 is the three-dimensional assembly diagram of the nut 301 of the ball-screw apparatus 300 of present embodiment.3rd embodiment Ball-screw apparatus 300 is the inner loop formula ball-screw apparatus as the first embodiment.About the 3rd embodiment Ball-screw apparatus 300, illustrate centered by the structure different from the first embodiment, and to the first embodiment The explanation that identical incomplete structure repeats.The ball-screw apparatus 300 of the 3rd embodiment, as shown in figure 11, circulation member 303, retaining member 307 is different from the first embodiment respectively with the structure of through hole 305.Other structures and the first embodiment phase With.
As shown in figure 11, the ball-screw apparatus 300 of present embodiment have be assembled into nut 301 loop embedding part, I.e. circulation member 303.The through hole 305 being radially formed through from the lateral inner peripheral surface side of outer peripheral face it is provided with at nut 301.Through hole The section of 305 is shaped generally as circle, and circulation member 303 is assembled in through hole 305.
It addition, as shown in figure 11, the ball-screw apparatus 300 of present embodiment has retaining member 307, this retaining member 307 for the circulation member 303 being assembled in through hole 305 is held in nut 301 and prevent circulation member 303 from nut 301 to Footpath comes off outward.As described later, retaining member 307 and circulation member 303 are configured at the external diameter of circulation member 303 contiguously Side.
The retaining member 307 of present embodiment is made up of engineering plastics.Retaining member 307 is being assembled in nut 301 The parts extended at the bearing of trend of the predetermined string of nut 301 under state, wherein, the face of inner circumferential side is formed as the extension of string Direction is axial as the width i.e. rectangular shape of minor face as the longest limit of length direction.Here, " string " refers to spiral shell String orthogonal with the central axis of through hole 305 in the string of the pitch circle of the female thread of female 301.
In the outer circumferential side part of the perisporium of nut 301, it is formed with predetermined axial width for housing retaining member 307 Accepting groove 311.Accepting groove 311 is to cross through hole 305 and the week of the through nut of bearing of trend 301 at string at the bearing of trend of string The outer circumferential side part of wall and formed.Groove 311, its bottom surface extends along the direction that string extends and is formed, from the end on observation of nut 301 Section shape be formed as using the outer peripheral edge of nut 301 as the part circular of circular arc, be in other words formed as arch.In arch The bottom of the two sides of accepting groove 311, the bottom surface extension along accepting groove 311 is formed in the axial direction of nut 301 on the contrary A pair locking groove 313,313 of direction depression.Accepting groove 311 and a pair locking groove 313,313 of arch are respectively real with first Execute accepting groove 111 and the identical structure of locking groove 113,113 of mode.A pair locking groove 313,313 as described later, by anticreep Parts 307 play a role as guiding piece when inserting the accepting groove 311 of arch.
Figure 12 is 5 views of the circulation member 303 of present embodiment.In fig. 12, Figure 12 A be in the assembled state from The figure that the inner circumferential side of nut 301 is observed.Figure 12 B is the B-B direction view of Figure 12 A.Figure 12 C is the C-C direction view of Figure 12 A.Figure 12D is the D-D direction view of Figure 12 C.Figure 12 E is the E-E direction view of Figure 12 D.It addition, the horizontal direction i.e. paper in Figure 12 A Left and right directions is the axial of nut 301, and vertical direction i.e. paper above-below direction is circumference or the extension side of string of nut 301 To.
As shown in each figure of Figure 12, circulation member 303 is shaped generally as discoid, in Figure 12 A as the one of face side The face 319 of side configures towards the inner circumferential side of nut 301.The face 319 of the inner circumferential side of circulation member 303, as indicated in fig. 12 c, is formed For being shaped as concave shape from the end on observation of nut 301.This concave shape becomes planar in the cylinder concentric with nut 301.? Face 319, is formed with the circulation road 315 as the groove for making not shown ball-recirculation.Circulate road 315 as illustrated in fig. 12, edge Nut 301 generally circumferentially extending, is shaped generally as S-shaped.
As shown in Figure 12 B～12E, the face 323 of the outside diameter of circulation member 303 is plane.In face 323, each such as Figure 12 Shown in figure, form that oriented radial direction foreign side is prominent and section shape is the first substantially rectangular ridge 324.First ridge 324 is passed through The central part in face 323 also extends in the direction that string extends.The both ends of the first ridge 324 are respectively formed with the periphery of specific surface 323 The protuberance 318,318 that edge is prominent to the foreign side of the bearing of trend of string further.The top ends of protuberance 318,318 is formed as round Arcuation.The face of the internal side diameter of protuberance 318,318 is disposed on the same plane with face 323.
It addition, in the face 323 of circulation member 303, as shown in Figure 12 B～Figure 12 E, form oriented radial direction foreign side and highlight and cut open Face is shaped as a pair second ridges 325,325 of substantially arc-shaped.Second ridge 325,325 from the central part in face 323 at axle Being formed extended at both sides the most round about, the end of the central part side in respective face 323 is connected with the first ridge 324.It addition, the The end of the central part opposition side with face 323 of two ridges 325,325 extends respectively into the outer rim in face 323.Owing to being such Structure, so the first ridge 324 and the second ridge 325,325 are formed at the substantially cross that the central part in face 323 intersects.Second The height of ridge 325,325 is formed lower than the height of the first ridge 324.That is, the first ridge 324 and the second ridge 325,325 Comparing, to the footpath of nut 301, overhang outward is big.It addition, the width of the second ridge 325,325 forms to obtain ratio the first ridge 324 is wide.
Figure 13 is 5 views of the retaining member 307 of present embodiment.In fig. 13, Figure 13 A is in nut 301 The figure of week side observation.Figure 13 B is the B-B direction view of Figure 13 A.Figure 13 C is the C-C direction view of Figure 13 A.Figure 13 D is Figure 13 C D-D direction view.Figure 13 E is the E-E direction view of Figure 13 D.It addition, the horizontal direction i.e. paper left and right directions in Figure 13 A is spiral shell Mother's 301 is axial, and vertical direction i.e. paper above-below direction is circumference or the bearing of trend of string of nut 301.
As shown in each figure of Figure 13, retaining member 307 is the parts extended in the direction that string extends, the face 327 of inner circumferential side The direction being formed as extending string is as the substantially rectangular plane of length direction.The direction that the string in the face 327 of inner circumferential side extends Both ends be formed as arc-shaped.The two sides of the two sides of retaining member 307, i.e. axial side is formed in parallel to each other.It addition, it is anti- The face of the outside diameter of de-parts 307, as shown in fig. 13 c, be formed as curved surface, and this curved surface has the outer peripheral face being suitable to nut 301 Curvature.Therefore, from the shape of end on observation retaining member 307, as shown in fig. 13 c, arch is formed as.
At the both ends of inner peripheral surface 327 side edge part of each side of retaining member 307, it is respectively formed with to nut 301 Assemble assembled state under axially projecting and retaining member 307 length direction extend ridge 309,309.Ridge 309, The edge of 309 is formed as the consecutive circular shape of circular shape of the end in the face 327 with inner circumferential side.Owing to being such knot Structure, so shape such as Figure 13 B, Figure 13 E of the bearing of trend observation from string of retaining member 307 show the most T-shaped.
In the face 327 of the inner circumferential side of retaining member 307, the central part being formed through face 327 and the direction extended at string The first slot 329 extended.It is substantially rectangular that first slot 329 is formed as section.The both ends of the first slot 329 to The direction foreign side that the string of retaining member 307 extends is open.Dash forward it addition, the first slot 329 has first with circulation member 303 Width that bar 324 is chimeric and the degree of depth, have the size of length ruler modest ability than the first ridge 324.
It addition, in the face 327 of the inner circumferential side of retaining member 307, be formed from the central part in face 327 in the axial direction to phase A pair second slots 331,331 that opposite direction extends and section is substantially circular shape.The face of the second slot 331,331 The end of the central part side of 327 is open at the first slot 329 respectively.It addition, the second slot 331,331 respectively the most through until The side of retaining member 307.Owing to being such structure, the first slot 329 and the second slot 331,331 are formed at face The substantially cross shape that the central part of 327 intersects.The degree of depth of the second slot 331,331 is formed than the first slot 329 Depth as shallow.It addition, the second slot 331,331 has for second ridge 325,325 chimeric width and the degree of depth.
Figure 14 is the front view from end on observation nut 301.As shown in figure 14, at the central part of nut 301, it is formed with edge The axle center of nut 301 extends, is used for inserting the hole 335 of not shown screw rod.Hole 335 is whole axial with roughly the same internal diameter Formed.At the inner peripheral surface in hole 335, it is formed with spiral helicine ball rolling groove 337.In the present embodiment, as shown in figure 14, logical Hole 305 arranges two on 180 ° of ground of circumferentially spaced of nut 301.Each through hole 305 extends to external diameter from the internal side diameter of nut 301 Side, open at the accepting groove 311 of arch.
Figure 15 is the side view of the nut 301 of the ball-screw apparatus 300 observing the 3rd embodiment from external diameter direction.As Shown in Figure 15, the through hole 305 of a side, the side that keeps left in the direction facing Figure 15 is formed.The through hole 305 of the opposing party, at nut 301 In circumference, the through hole 305 with a side separates 180 ° of ground formation, is formed on the right side in the direction facing Figure 15.It is to say, a side Through hole 305 and the through hole 305 of the opposing party formed with axially offsetting.
Figure 16 is the side view of the nut 301 of the ball-screw apparatus 300 observing the 3rd embodiment from external diameter direction, table Show that the through hole 305 a side assembles the state of circulation member 303.
As shown in figure 16, circulation member 303 so that the first ridge 324 extends in direction that string extends and the second ridge 325, 325 modes extended axially are assembled in the through hole 305 of nut 301.The both ends of the first ridge 324 i.e. protuberance 318,318 , the face of internal side diameter contacts with the bottom surface of the accepting groove 311 of arch.The face of internal side diameter and receipts due to protuberance 318,318 The bottom surface of tank 311 contacts, thus circulation member 303 is limited in nut 301 when being assembled in through hole 305 The movement of side, footpath.In other words, carry out about location radially.So, protuberance 318,318 becomes and conventional ball-screw dress The structure that the protuberance 1117,1117 (with reference to Figure 34) of the fin-shaped in putting is corresponding.
Figure 17 be the 17-17 of Figure 15 to regarding sectional view, Figure 17 A represents that circulation member 303 and retaining member 307 are assembled in The state of nut 301, Figure 17 B represents unassembled circulation member 303 and the state of retaining member 307.
As shown in Figure 17 A, 17B, the ridge 309,309 of retaining member 307 is sticked in the accepting groove 311 in arch respectively The locking groove 313,313 that the bottom of two sides is formed.It addition, the first ridge 324 of circulation member 303 is sticked in retaining member First slot 329 of 307.It addition, the second ridge 325,325 of circulation member 303 is sticked in the second card of retaining member 307 Close groove 331,331.So, the face 323 of the outside diameter of circulation member 303 connects with the face 327 of the internal side diameter of retaining member 307 Touch.
In the present embodiment, by making the first ridge 324 be sticked in the first slot 329 of retaining member 307, circulation Parts 303 are determined relative to the phase place of nut 301 and circulation member 303 is limited relative to the rotation of nut 301.It addition, By making the second slot 331,331 be sticked in the second ridge 325,325 of circulation member 303, carry out retaining member 307 relative Location in circulation member 303.
Then, the assemble method assembling circulation member 303 and retaining member 307 to nut 301 is illustrated.Circulation portions Part 303 and retaining member 307 are when nut 301 assembles, shown in Figure 11, first circulation member 303 are assembled into the logical of nut 301 Hole 305, is then assembled into accepting groove 311 by retaining member 307.
When assembling circulation member 303 to through hole 305, circulation member 303 is radially oriented from the radial outside of nut 301 Interior side inserts through hole 305.Now, extend in direction that string extends with the first ridge 324 and a pair second ridges 325,325 are at axle To extend towards insertion.Then, by making the protuberance 318,318 of the first ridge 324 connect with the bottom surface of accepting groove 311 Touch, and be circulated the parts 303 location about the radial direction of nut 301.Now, the face 319 of the inner circumferential side of circulation member 303 with The inner peripheral surface of nut 301 is positioned on the same face.It addition, in this stage, be not circulated the parts 303 phase relative to nut 301 Position determines.
It follows that assemble retaining member 307 to accepting groove 311.About retaining member 307 to the assembling of accepting groove 311, Figure 18 is illustrated two kinds of assemble methods.First, first method is to make retaining member 307 exist from the outer peripheral face side of nut 301 The method that the bearing of trend of the i.e. string in direction that accepting groove 311 extends slides.The method is as follows: by two pleurapophysis of retaining member 307 The end of bar 309,309 is inserted into the end of a pair locking groove 313,313 formed in the side of accepting groove 311, and keeps former Make retaining member 307 slide along the bottom surface of accepting groove 311 at the bearing of trend of string shape.Now, a pair locking groove 313,313 Fasten with ridge 309,309, guide the insertion of retaining member 307.
Then, when a square end portion of retaining member 307 arrives the end of the first ridge 324 of circulation member 303, anticreep Parts 307 make the first slot 329 and the first ridge 324 fasten while string bearing of trend slide.In this stage, Determine the circulation member 303 phase place relative to nut 301.And then, when a square end portion of retaining member 307 arrives circulation member 303 the second ridge 325,325 time, in retaining member 307, the second ridge 325,325 is crossed in this square end portion, with the second ridge 325,325 parts abutted elastic deformation on one side, retaining member 307 is advanced at the bearing of trend of string.When retaining member 307 Second slot 331,331 arrive the second ridge 325,325 time, second slot the 331,331 and second ridge 325,325 block Close.Thus, retaining member 307 is located in the precalculated position of outside diameter of circulation member 303.It addition, by circulation member 303 The first ridge 324 be sticked in the first slot 329 of retaining member 307, complete circulation member 303 relative to nut 301 Phase place determines.So, the assembling to nut 301 of circulation member 303 and retaining member 307 is completed.
The second method of the assemble method assembling retaining member 307 to accepting groove 311 is following method: from nut 301 Outer peripheral face side, is pressed into retaining member 307 in accepting groove 311 in generally vertical direction, then relative to the bottom surface of accepting groove 311 Retaining member 307 is made to slide along the bottom surface of accepting groove 311 at the bearing of trend of string.In the method, first, from being assembled in spiral shell The radial outside of the circulation member 303 of female 301 and be moved slightly away from the position at center of nut 301, towards the bottom surface of accepting groove 311 In vertical direction, retaining member 307 is pressed in accepting groove 311.When retaining member 307 is pressed in accepting groove 311, anticreep First slot 329 of parts 307 is sticked in the first ridge 324 of circulation member 303 the most partly from footpath.When by anticreep When parts 307 are pressed into further, retaining member 307 arrives ridge 309,309 card of the bottom surface of accepting groove 311, retaining member 307 Together in a pair locking groove 313,313.In this stage, determine the circulation member 303 phase place relative to nut 301.
Then, in the same manner as above-mentioned first method, make retaining member 307 along the bottom surface of accepting groove 311 in the extension of string Slide in direction.Now, a pair locking groove 313,313 fastens with ridge 309,309, guides the insertion of retaining member 307.And And, in the same manner as above-mentioned first method, make retaining member 307 slide until the second slot 331,331 of retaining member 307 blocks The second ridge 325,325 together in circulation member 303.Thus, retaining member 307 is located in precalculated position, and completes to follow The phase place of ring component 303 determines.So, the assembling to nut 301 of circulation member 303 and retaining member 307 is completed.
When circulation member 303 and retaining member 307 are assembled in nut 301, although via not shown ball The load being delivered to circulation member 303 from the inner circumferential side of nut 301 is delivered to retaining member 307, but, due to retaining member 307 is from the direction different from the direction of insertion inserting circulation member 303 to through hole 305, i.e. from the extension side of the string of nut 301 To being inserted into nut 101, so, do not have retaining member 307 and take off because of the load in circulation member 303 direction to be come off The problem fallen.Therefore, it is possible to prevent coming off of circulation member 303.Further, since ridge 309,309 is sticked in string extension The locking groove 313,313 of accepting groove 311 that direction extends, it is thus possible to prevent retaining member 307 from nut 301 to footpath outward Come off.
As it has been described above, in the present embodiment, it is provided with the first ridge 324 in the face 323 of the outside diameter of circulation member 303, The both ends of the first ridge 324 i.e. face of the internal side diameter of protuberance 318,318 contacts with the bottom surface of the accepting groove 311 of arch, Thus limit the circulation member 303 movement to internal side diameter.It addition, retaining member 307 prevents circulation member 303 from taking off from nut 301 Fall, and the phase place being circulated parts 303 determines.Owing to being such structure, so, it is not necessary to formed at nut 301 and be used for The structure of engaging protuberance 318,318.Specifically, it is not necessary to through hole 305 and accepting groove 311 at nut 1301 arrange protuberance 318, the snap-in structure of 318.As a result, the working position of nut 301 will be less than in the past, it is possible to realizes the reduction of manufacturing cost.
It addition, in the present embodiment, retaining member 307 easily can be configured at the outside diameter of circulation member 303 Precalculated position.Owing to being such structure, so, by retaining member 307 is assembled in nut 301, it is possible to assemble The phase place being simultaneously easily circulated parts 303 determines.As a result, it is possible to alleviate circulation member 303 and retaining member 307 groups Install to the workload of nut 301, it is possible to realize the reduction of manufacturing cost.
So, according to present embodiment, it is possible to without difficultyly by circulation member 303 be used for keeping circulation member 303 Retaining member 307 in nut 301 is easily assembled in nut 301, so that can prevent circulation member 303 from taking off from nut 301 Fall.
(the 4th embodiment)
Then, the 4th embodiment of the ball-screw apparatus of the present invention is illustrated.
Figure 19 is the three-dimensional assembly diagram of the nut 301 of the ball-screw apparatus 400 of the 4th embodiment.Implement about the 4th The ball-screw apparatus 400 of mode, illustrates centered by the structure different from the 3rd embodiment, and implements with the 3rd The incomplete structure repeat specification that mode is identical.It addition, to the parts identical with the 3rd embodiment, use identical reference Illustrate.The ball-screw apparatus 400 of the 4th embodiment is structure and the accepting groove 411 of arch of retaining member 407 The example that form is different from the 3rd embodiment.Other structures are identical with the 3rd embodiment.
Figure 20 is 5 views of the retaining member 407 of present embodiment.In fig. 20, Figure 20 A is in nut 301 The figure of week side observation.Figure 20 B is the B-B direction view of Figure 20 A.Figure 20 C is the C-C direction view of Figure 20 A.Figure 20 D is Figure 20 C D-D direction view.Figure 20 E is the E-E direction view of Figure 20 D.It addition, the horizontal direction i.e. paper left and right directions in Figure 20 A is spiral shell Mother's 301 is axial, and vertical direction i.e. paper above-below direction is circumference or the bearing of trend of string of nut 301.
As shown in each figure of Figure 20, the parts that retaining member 407 extends in the direction that string extends, the inner circumferential of body 408 The direction that the face 327 of side is formed as extending string is as the substantially rectangular plane of length direction.The face 327 of inner circumferential side is prolonged at string The both ends in the direction stretched are formed as arc-shaped.It addition, the face of the outside diameter of body 408, as shown in Figure 20 C, be formed as bent Face, this curved surface has the curvature of the outer peripheral face being suitable for nut 301.Therefore, from the shape of end on observation retaining member 407, as Shown in Figure 20 C, be formed as arch.
The both ends in the direction that the two sides of the two sides of body 408, i.e. axial side extends at string respectively are formed at axle To the bellying 409,409 bloated.The edge of the inner circumferential side of each bellying 409 is formed as the end in the face 327 with inner circumferential side The consecutive circular shape of circular shape.It is formed with four bellyings 409 altogether at body 408, as shown in Figure 20 A, 20D, It is each configured with one in the end in the direction that string extends at a pair bellying 409,409 axially clipping the setting of body 408 ground Group.The side of this pair bellying 409,409 is formed as along with from inner peripheral surface 327 side towards outside diameter, distance to each other connects The taper that near direction tilts.Therefore, observe the shape of retaining member 407 from the bearing of trend of string, as shown in Figure 20 B, 20E, For generally trapezoidal.
It addition, in the two sides of retaining member 407, the part between the bellying 409,409 of each side is in parallel to each other Formed.It addition, be formed at first slot 329 in the face 327 of inner circumferential side and the structure of the second slot 331,331 with the 3rd in fact Execute mode identical.
Figure 21 is the side view of the nut 301 of the ball-screw apparatus observing the 4th embodiment from external diameter direction.It addition, Figure 22 A, 22B be the 22-22 of Figure 21 to regarding sectional view, Figure 22 A represents that circulation member 303 and retaining member 407 are assembled in nut The state of 301, Figure 22 B represents unassembled circulation member 303 and the state of retaining member 407.
As shown in figure 21, the nut 301 of the 4th embodiment, in the same manner as the 3rd embodiment, form two through holes 305, the two through hole 305 is being formed with axially offsetting.It addition, the accepting groove 411 of arch, as shown in Figure 22 A, 22B, prolong from string The section shape that the direction stretched is observed is generally trapezoidal.That is, the two sides of the accepting groove 411 of arch are formed as along with from internal side diameter The direction that distance to each other is close towards outside diameter tilts and corresponding with the side of the bellying 409 of retaining member 407 Taper.
It addition, as shown in fig. 22, the most each side of tapered portion of a pair bellying 409,409 of retaining member 407 is sticked in The tapered portion of the two sides of accepting groove 411 i.e. two sides.It addition, the first ridge 324 of circulation member 303 is sticked in retaining member First slot 329 of 407.It addition, the second ridge 325,325 of circulation member 303 is sticked in the second card of retaining member 407 Close groove 331,331.So, the face 323 of the outside diameter of circulation member 303 connects with the face 327 of the internal side diameter of retaining member 407 Touch.
In the present embodiment, in the same manner as the 3rd embodiment, by making the first ridge 324 be sticked in retaining member First slot 329 of 407, circulation member 303 is determined relative to the phase place of nut 301 and circulation member 303 is relative to spiral shell The rotation of female 301 is limited.It addition, by make the second slot 331,331 be sticked in circulation member 303 the second ridge 325, 325, carry out the retaining member 407 location relative to circulation member 303.
Then, the assemble method assembling circulation member 303 and retaining member 407 to nut 301 is illustrated.Circulation portions Part 303 and retaining member 407 are when nut 301 assembles, shown in Figure 19, first circulation member 303 are assembled into the logical of nut 301 Hole 305, is then assembled into accepting groove 411 by retaining member 407.Circulation member 303 is to the assembling of through hole 305 and the 3rd embodiment party Formula is identical.
After circulation member 303 is assembled into through hole 305, assemble retaining member 407 to accepting groove 411.About anticreep Parts 407, to the assembling of accepting groove 411, are illustrated two kinds of assemble methods in fig 23.First, first method is to make anti-delinking part The method that the bearing of trend of the string that part 407 extends along accepting groove 411 from the outer peripheral face side of nut 301 slides.The method is as follows: A square end portion by retaining member 407 is inserted into the end of accepting groove 411, and makes retaining member 407 along receipts with keeping intact Slide at the bearing of trend of string in the bottom surface of tank 411.Now, the tapered portion of accepting groove 411 i.e. two sides and retaining member 407 The most each side of tapered portion of a pair bellying 409,409 fastens, and guides the insertion of retaining member 407.
Then, when a square end portion of retaining member 407 arrives the end of the first ridge 324 of circulation member 303, anticreep Parts 407 make the first slot 329 and the first ridge 324 fasten while string bearing of trend slide.Then, with The first method of three embodiments similarly, makes retaining member 407 slide, until the second slot 331 of retaining member 407, 331 the second ridges 325,325 being sticked in circulation member 303.Thus, retaining member 407 is located in precalculated position, and complete Circulation member 303 is become to determine relative to the phase place of nut 301.So, circulation member 303 and retaining member 407 are completed to nut The assembling of 301.
The second method of the assemble method assembling retaining member 407 to accepting groove 411 is following method: from nut 301 Outer peripheral face side, is pressed into retaining member 407 in accepting groove 411 in generally vertical direction, then relative to the bottom surface of accepting groove 411 Retaining member 407 is made to slide along the bottom surface of accepting groove 411 at the bearing of trend of string.
In the method, first, from being assembled in the radial outside of circulation member 303 of nut 301 and being moved slightly away from nut The position at the center of 301, is pressed into retaining member 407 in accepting groove 411 towards the bottom surface of accepting groove 411 in vertical direction.? This, the size of the axial width of the part being formed with bellying 409 of retaining member 407 is bigger than other parts.It addition, accepting groove The two sides of 411 are formed as the taper tilted along with the direction that the distance to each other towards outside diameter is close, so, outside diameter Axial width narrow.It is preferred, therefore, that relative to accepting groove 411, from by the end of a side side of retaining member 407 The part being formed with bellying 409,409 is located at the position corresponding with through hole 305 and the end of other party side is formed drum Go out the part in portion 409,409 to be located at and rise by the such position of outer fix of the bearing of trend of string than the end of accepting groove 411, will Retaining member 407 is pressed into accepting groove 411 (with reference to Figure 23).
When retaining member 407 being pressed in accepting groove 411, the first slot 329 of retaining member 407 is from footpath outward It is sticked in the first ridge 324 of circulation member 303 partly.When retaining member 407 arrives the bottom surface of accepting groove 411, at this In the stage, determine the circulation member 303 phase place relative to nut 301.Then, in the same manner as above-mentioned first method, retaining member is made 407 along accepting groove 411 bottom surface string bearing of trend slide.Now, the two sides of accepting groove 411 and retaining member 407 Each side of a pair bellying 409,409 fasten, guide the insertion of retaining member 407.Further, same with above-mentioned first method Sample ground, makes retaining member 407 slide until the second slot 331,331 of retaining member 407 is sticked in the of circulation member 303 Two ridges 325,325.Thus, retaining member 407 is located in precalculated position, and completes circulation member 303 relative to nut The phase place of 301 determines.So, the assembling to nut 301 of circulation member 303 and retaining member 407 is completed.
The most similarly, the state of nut 301 it is assembled at circulation member 303 and retaining member 407 Under, although the load being delivered to circulation member 303 from the inner circumferential side of nut 301 via not shown ball is delivered to anti-delinking part Part 407, but, due to retaining member 407 be from the direction different from the direction of insertion inserting circulation member 303 to through hole 305, The i.e. bearing of trend from the string of nut 301 is inserted into nut 301, so, do not have retaining member 407 because of circulation member The load in 303 directions to be come off and the problem that comes off.Therefore, it is possible to prevent coming off of circulation member 303.Further, since one The most each side of tapered portion to bellying 409,409 is sticked in the tapered portion i.e. two sides of accepting groove 411, it is thus possible to prevent anticreep Parts 407 from nut 301 to footpath coming off outward.
As it has been described above, in the present embodiment, in the same manner as the 3rd embodiment, at the outside diameter of circulation member 303 Face 323 is provided with the first ridge 324, the face at the both ends of the first ridge 324, the i.e. internal side diameter of protuberance 318,318 and accepting groove The bottom surface of 411 contacts, thus limits the circulation member 303 movement to internal side diameter.It addition, retaining member 407 prevents circulation portions Part 303 comes off from nut 301, and the phase place being circulated parts 303 determines.Owing to being such structure, so, it is not necessary to Nut 301 forms the structure for engaging protuberance 318,318.Specifically, it is not necessary in through hole 305 and the collecting of nut 301 Groove 411 arranges the snap-in structure of protuberance 318,318.As a result, the working position of nut 301 will be less than in the past, it is possible to realizes system Cause this reduction.
It addition, in the present embodiment, with the 3rd embodiment likewise it is possible to retaining member 407 is easily configured Precalculated position in the outside diameter of circulation member 303.Owing to being such structure, so, by retaining member 407 is assembled in Nut 301, it is possible to the phase place being easily circulated parts 303 while assembling determines.As a result, it is possible to alleviate circulation portions Part 303 and retaining member 407 are assembled into the workload of nut 301, it is possible to realize the reduction of manufacturing cost.
So, according to present embodiment, it is possible to without difficultyly by circulation member 303 be used for keeping circulation member 303 Retaining member 407 in nut 301 is easily assembled in nut 301, so that can prevent circulation member 303 from taking off from nut 301 Fall.
(the 5th embodiment)
Then, the 5th embodiment of the ball-screw apparatus of the present invention is illustrated.The ball wire of present embodiment Thick stick device is also the inner loop formula ball-screw apparatus as the first embodiment.
As shown in fig. 24 a, the ball-screw apparatus 501 of the 5th embodiment has screw rod 502 and across multiple balls 503 nuts 504 threadingly engaging in screw rod 502.
Screw rod 502 is made up of the metal parts of elongated cylindrical shape.At the outer peripheral face of screw rod 502, landform in the shape of a spiral Become the thread groove having section to be substantially circular shape.
Nut 504 is by the metal parts of the substantially cylindrical shape being formed with the circular openings bigger than the external diameter of screw rod 502 Constitute.At the inner peripheral surface of nut 504, it is formed with section the most in the shape of a spiral with the thread groove of screw rod 502 for substantially circular arc The thread groove of shape.
Screw rod 502 inserts and runs through in the openings of nut 504, thread groove each other relatively to and form the rolling of ball Road.Being filled with metal multiple ball 503 in this rolling road, thus, screw rod 502 and nut 504 are threadedly engaged.
According to this structure, by making either one rotation of screw rod 502 and nut 504, multiple balls 503 roll in rolling road Dynamic, and the opposing party in screw rod 502 and nut 504 can be made in axially rectilinear movement.Follow here, there is formation at nut 504 The circulation member 507 of loop, this circulation road for returning to roll the predetermined area on road by the ball 503 of rolling.Therefore, multiple Ball 503 can circulate in rolling road via circulation road.
As shown in Figure 24 A～Figure 24 D, circulation member 507 is inserted in the installing hole 505 that nut 504 is formed, by fastening Parts 509 are fixed.
Circulation member 507 is that metal is made, and as shown in Figure 25 A～Figure 25 B, section is Long Circle (Japanese: little sentence Shape, Japan a kind of gold coin of ancient times shape) columnar part constitute.It addition, the material of circulation member 507 is preferably suitable to sintering Material, in particular, it is preferred that the metal materials such as Fe-2Ni-C, Fe-8Ni, resin material.
As shown in Figure 25 A and Figure 25 B, at the interior aspect of circulation member 507, it is formed with the S that section is substantially circular shape The S-shaped groove 511 of shape.It addition, in the present embodiment, the face of the downside of the circulation member shown in Figure 25 A, the face of upside claim respectively " interior aspect ", " outer aspect " for circulation member.
As shown in Figure 25 C and Figure 25 D, in the middle position of the outer aspect of circulation member 507, outside crossing in the width direction The mode of aspect is formed with groove portion 512.The width of the width of the width ratio secure component described later 509 in groove portion 512 is slightly larger. The middle position of the bottom land in groove portion 512 is provided with jut 513.Jut 513 is included in the central axial of circulation member 507 Columned axle portion 513a that the left and right directions of i.e. Figure 25 C extends and the diameter head 513b bigger than this axle portion 513a.
It addition, at the outer aspect of circulation member 507, as shown in Figure 25 D, groove portion 512 formation peak, both sides portion 514, 514.Top 514a, the 514a in peak portion 514,514 extends and the most flat in the direction tilted relative to the length direction of outer aspect OK.In detail, the medial slope 514b being positioned at jut 513 side when with top 514a for segmentation peak, boundary portion 514 is formed as General triangular, and inclined-plane, the outside 514c being positioned at the opposition side of this medial slope 514b is shaped generally as semicircular arc.
In the side of circulation member 507, as shown in Figure 25 A～Figure 25 D, it is formed flange shape in the end of interior aspect side Claw 515.Claw 515 by clip the central shaft ground of circulation member 507 relatively in the way of be arranged at two positions.
At nut 504, as shown in Figure 24 A and Figure 26, it is formed with the installing hole 505 for installing circulation member 507.Install Hole 505 be included in through and chimeric with the circulation member 507 oblong through hole 505a of the radial direction of nut 504 and circular and The counterbore 505b concentric with through hole 505a.Counterbore 505b is formed to inner side from the radial outside of nut 504, and diameter compares circulation member The length of the length of the width of the outer aspect of 507 and the length direction of secure component described later 509 is big.It addition, counterbore The shape of 505b is not limited to circle, it is also possible to be rectangle, ellipse.
Secure component 509, for circulation member 507 being fixed and is held in the installing hole 505 of nut 504, uses and adds section chief Inserted sheet nut (speed nut) shown in Figure 27 of square metallic plate.In detail, as seen in fig. 27 c, secure component 509, by two joint-cuttings extended at length direction in the incision of the middle position of metallic plate and then to connect this joint-cutting each other Mode forms the notch 509a of quadrilateral shape, thus arranging out top is V-shaped and two extensions extended to central authorities 509c、509c.And, when secure component 509 is observed from side as shown in Figure 27 D, central position above Figure 27 D curved Being converted into crest, two extensions 509c, 509c are inclined to top arrive the more top of Figure 27 D in root portion bendings.
The length of the length direction of this secure component 509 is longer than the length of the width of the outer aspect of circulation member 507, Shorter than the length of the length direction of outer aspect.It addition, outside the length of the width of secure component 509 is than circulation member 507 The length of the width of aspect is short.Therefore, the notch 509a of secure component 509 is being installed on the prominent of circulation member 507 When playing portion 513 and make the length direction of outer aspect of circulation member 507 orthogonal with the length direction of secure component 509, fastening part Both ends 509b, 509b of the length direction of part 509 from circulation member 507 outer in terms of prominent (with reference to figure at width 29A).It addition, when the length direction of the outer aspect of circulation member 507 is consistent with the length direction of secure component 509, fastening part Part 509 will not from circulation member 507 outer in terms of width is prominent also will not be prominent (with reference to Figure 31 A) at length direction.
In the ball-screw apparatus 501 of present embodiment configured as described, circulation member 507 is to nut 504 Installation is to carry out according to the installation steps shown in Figure 28.It addition, circulation member 507 is by screw rod to the installation of nut 504 502 and ball 503 be assembled into nut 504 before carry out.
Step 1: as shown in Figure 28 A, inserts and is embedded in the installing hole of nut 504 by circulation member 507 from radially inner side 505.Thus, as shown in fig. 29b, adjacent thread groove 504a, 504a of the inner peripheral surface of nut 504 is by the S-shaped of circulation member 507 Groove 511 connects, and completes the circulation road of above-mentioned ball 503.It addition, as shown in Figure 24 D, the claw 515,515 of circulation member 507 with The inner peripheral surface of nut 504 abuts against, and limits circulation member 507 and moves to radial outside in the installing hole 505 of nut 504.
Step 2: as shown in Figure 28 B, is inserted into the installing hole 505 of nut 504 by secure component 509 from radial outside.So After, make extension 509c, 509c elastic deformation that the notch 509a of secure component 509 is installed on circulation member The jut 513 of 507.Now, as shown in figure 29 a, with length direction and the secure component 509 of the outer aspect of circulation member 507 Length direction orthogonal mode secure component 509 is fallen into the groove portion 512 of circulation member 507.Thus, secure component 509 Both ends 509b, 509b of length direction is connected to the counterbore bottom surface 505c (with reference to Figure 24 D) of installing hole 505, fastening part respectively Part 509 is elastic deformation between the head 513b of the counterbore bottom surface 505c of installing hole 505 and the jut 513 of circulation member 507. Therefore, circulation member 507 maintains by secure component 509 shape to radial outside force in the installing hole 505 of nut 504 State.Thus, circulation member 507 is fixed in the position of the radial direction of installing hole 505 inner nut 504 of nut 504 and posture, completes Circulation member 507 is to the installation of nut 504.It addition, be installed on the secure component 509 of circulation member 507 due to notch 509a The head 513b of the engaged jut 513 in circulation member 507, thus do not have the problem come off from circulation member 507.
According to above-mentioned installation steps, it is possible to do not use bonding agent that circulation member 507 is just installed on the installing hole of nut 504 505.Therefore, it is possible to significantly shorten manufacturing time.It addition, do not have following problem: the most conventional ball-screw dress Put like that, until the period of bonding agent solidification, produce circulation member 507 tilted such at the installing hole 505 of nut 504 The problems such as position skew and cause the action of ball-screw apparatus 501 bad or fault.
Further, since claw 515,515 and secure component 509, circulation member 507 is in the installing hole 505 of nut 504 Position radially and posture are fixed all the time.Therefore, even if produce vibration etc. when the use of ball-screw apparatus 501, also can Enough prevent that circulation member 507 comes off from the installing hole 505 of nut 504 or in the tilted such position of installing hole 505 The problems such as skew, it is possible to the action being effectively prevented ball-screw apparatus 501 is bad, the generation of fault.
It addition, as it has been described above, secure component 509 is incorporated in the groove portion 512 of circulation member 507.Therefore, though fastening part Part 509 to rotate centered by the jut 513 of circulation member 507, also can abut against with the sidewall in groove portion 512 and limit rotation Turn.Therefore, when using ball-screw apparatus 501 etc., following problem is not had: secure component 509 rotates, from nut 504 Radial outside observe time circulation member 507 outer aspect overlapping with secure component 509, secure component 509 is to circulation member 507 Fixing be released from.
Further, since do not use bonding agent in above-mentioned installation steps, therefore, fastening part can be pulled down from circulation member 507 Part 509.Therefore, at life-time service after ball-screw apparatus 501, it is also possible to carry out the removal of dust, lubrication, circulation member The replacings of 507 etc. are safeguarded.
So, according to present embodiment, it is possible to without difficultyly by circulation member 507 be used for keeping circulation member 507 Secure component 509 in nut 504 is easily assembled in nut 504, so that can prevent circulation member 507 from taking off from nut 504 Fall.
(the 6th embodiment)
About the ball-screw apparatus 520 of the 6th embodiment shown in Figure 30 A, omit and above-mentioned 5th embodiment phase The explanation of same structure, is described in detail to different parts.
In the ball-screw apparatus 520 of present embodiment, circulation member 507 is according to following to the installation of nut 504 Installation steps carry out.It addition, circulation member 507 is to the installation of nut 504, in the same manner as above-mentioned 5th embodiment, it is Carried out before screw rod 502 and ball 503 are assembled into nut 504.
Step 1: as shown in Figure 31 A and Figure 31 B, makes extension 509c, 509c elastic deformation will fasten in advance The notch 509a of parts 509 is installed on the jut 513 of circulation member 507.Now, the outer aspect of circulation member 507 is made Length direction is consistent with the length direction of secure component 509.
Step 2: will be mounted with the circulation member 507 of secure component 509 in above-mentioned steps 1, as shown in fig. 30 a, Insert and be embedded in the installing hole 505 of nut 504 from radially inner side.Thus, in the above-described 5th embodiment, such as Figure 29 B institute Showing, adjacent thread groove 504a, 504a of the inner peripheral surface of nut 504 is connected by the S-shaped groove 511 of circulation member 507, completes ball The circulation road of 503.It addition, as shown in fig. 30d, the claw 515,515 of circulation member 507 abuts against with the inner peripheral surface of nut 504, Limit circulation member 507 to move to radial outside in the installing hole 505 of nut 504.
Step 3: as shown in Figure 32 A and Figure 32 B, so that the length direction of the outer aspect of circulation member 507 and fastening part The mode that the length direction of part 509 is orthogonal makes secure component 509 revolve counterclockwise centered by the jut 513 of circulation member 507 Turn, make secure component 509 fall into the groove portion 512 of circulation member 507.Thus, the both ends of the length direction of secure component 509 509b, 509b are connected to the counterbore bottom surface 505c (with reference to Figure 30 D) of installing hole 505 respectively, and secure component 509 is at installing hole 505 Counterbore bottom surface 505c and circulation member 507 jut 513 head 513b between elastic deformation.Therefore, circulation member 507 Middle maintenance is by secure component 509 state to radial outside force in the installing hole 505 of nut 504.Thus, circulation member 507 are fixed in the position radially of nut 504 and posture in the installing hole 505 of nut 504, complete circulation member 507 Installation to nut 504.It addition, be installed on the secure component 509 of circulation member 507 due to notch 509a engaged in circulation The head 513b of the jut 513 of parts 507, thus do not have the problem come off from circulation member 507.
According to above-mentioned installation steps, it is possible to play the effect as above-mentioned 5th embodiment.
It addition, as described in the above-described 5th embodiment, at the outer aspect of circulation member 507, such as Figure 32 A institute Show, in formation peak, the both sides portion 514,514 in groove portion 512.Top 514a, the 514a in peak portion 514,514 is to relative to outer aspect The direction that length direction tilts extends and is parallel to each other.According to this structure, in the present embodiment, make secure component 509 with Rotate the most counterclockwise when rotating centered by the jut 513 of circulation member 507, it is possible to more easily implement above-mentioned step The operation of rapid 3.
It addition, the present invention is not limited by above-mentioned each embodiment, suitably change can be applied in the range of it.Example As, above-mentioned first～the 4th in embodiment, be illustrated be respectively arranged respectively two for assemble circulation member 103, 203,303 through hole 105,305 and for assemble the accepting groove 111 of the arch of retaining member 107,307,407,311, 411, but, the quantity of these through holes 105,305 and accepting groove 111,311,411 can be according to the size of ball-screw apparatus Suitably change.
Alternatively, it is also possible to arrange passage at the perisporium of nut 101 to substitute the accepting groove in the first and second embodiments 111, this passage crosses the direction that through hole 105 ground extends at the string of nut 101 and extends and have and can insert the big of retaining member 107 Little.According to such structure, in the case of the diameter of nut 101 is big, than accepting groove 111 is formed greatly, it is possible to press down The rigidity of nut 101 processed reduces.
It addition, in above-mentioned 5th and the 6th embodiment, use inserted sheet nut as secure component 509.But, fastening Parts 509 are not limited to this, as long as the counterbore bottom surface 505c of the installing hole 505 of nut 504 can be connected to limit circulation portions The parts that part 507 moves to the radially inner side of nut 504.Therefore, in the above-described 5th embodiment, such as check ring etc. Like that, as long as have the opening of the jut 513 being mountable to circulation member 507, from circulation member 507 outer in terms of at width Degree direction is prominent and can be connected to the counterbore bottom surface this level of parts of 505c of installing hole 505 of nut 504.Above-mentioned In 6th embodiment, on the basis of this condition, as long as be accommodated in the outer aspect of circulation member 507 in above-mentioned steps 1 This level of parts.And, in above-mentioned 5th and the 6th embodiment, as secure component 509, if can bullet Property deformation with by radial outside from circulation member 507 to nut 504 exert a force parts the most more preferably.Thereby, it is possible to preferably Limit circulation member 507 moving radially to nut 504.Specifically, in the above-described 5th embodiment, it would however also be possible to employ anti- Pine nut (push nut), circular inserted sheet nut etc. are as secure component 509.
It addition, in above-mentioned 5th and the 6th embodiment, be arranged at the outer aspect of circulation member 507 peak portion 514, The shape of 514 is also not necessarily limited to described above.At the 5th embodiment, at the outer aspect of circulation member 507, it is also possible to do not have Peak portion 514,514, thus, it is possible to realize cost degradation.In the 6th embodiment, as shown in Figure 31 C, can be by top 514a Outside the area ratio of the medial slope 514b being arranged to peak portion 514, the area of inclined-plane 514c is much smaller.In the case, above-mentioned In step 3, secure component 509 easily rotates centered by the jut 513 of circulation member 507 clockwise.It addition, also The inclination that can make inclined-plane 514c outside the rake ratio of medial slope 514b relaxes.Especially, medial slope 514b can be made not Tilt, become the horizontal plane substantially vertical with the central shaft of circulation member 507, thus, it is possible to realize cost degradation.
It addition, in above-mentioned each embodiment, it is shown that the outer diameter shape of nut is the example of drum, but spiral shell Female outer diameter shape can be rectangle, polygon etc., can fit according to the purposes of ball-screw apparatus or riding position Work as change.
Description of reference numerals
101,301,504 nut
103,203,303 circulation member
105,305 through hole
107,307,407 retaining member
109,309 ridge
111,311,411 accepting groove
113,313 locking groove
115,315 circulation road
117 protuberances
119, the face of 319 inner circumferential sides
123, the face of 223,323 outside diameters
125 ridges
127 curved face part
139 groove portions
245 protuberances
100,200,300,400 ball-screw apparatus
318 protuberances
324 first ridges
325 second ridges
327 inner peripheral surfaces
329 first slots
331 second slots
408 bodies
409 bellyings
501,520 ball-screw apparatus
502 screw rods
503 balls
504 nuts
505 installing holes
505a through hole
505b counterbore
505c counterbore bottom surface
507 circulation members
509 secure components (inserted sheet nut)
509a notch
512 groove portions
513 juts
514 peaks portion
515 claws

Claims (28)

1. a ball-screw apparatus, has:
The screw rod that linearity extends, this screw rod is formed with spiral helicine groove at outer peripheral face；
Nut, this nut inner peripheral surface have relative with the spiral helicine groove of above-mentioned screw rod to spiral helicine groove；And
Multiple balls, the plurality of ball can rollably be configured at the spiral helicine groove of above-mentioned screw rod and the spiral helicine of above-mentioned nut Between groove；
Above-mentioned nut is embedded in above-mentioned screw rod across above-mentioned multiple balls, has for making above-mentioned multiple ball at above-mentioned screw rod The circulation member of circulation between the groove of groove and above-mentioned nut, and be configured with outward for inciting somebody to action by footpath than above-mentioned circulation member Above-mentioned circulation member is held in the holding member of above-mentioned nut；It is characterized in that,
Above-mentioned circulation member has and limits the above-mentioned circulation member limiting unit in movement radially by being contacted with above-mentioned nut；
In order to keep above-mentioned circulation member, it is provided with for engaging above-mentioned circulation member at above-mentioned circulation member and above-mentioned holding member Snap fastener with above-mentioned holding member.
2. ball-screw apparatus as claimed in claim 1, it is characterised in that above-mentioned snap fastener is to be formed in the assembled state In the protuberance in face of outside diameter of above-mentioned circulation member and be formed at above-mentioned holding member and engage with above-mentioned protuberance Curved face part.
3. ball-screw apparatus as claimed in claim 2, it is characterised in that above-mentioned protuberance is in the assembled state axially The ridge extended.
4. ball-screw apparatus as claimed in claim 2, it is characterised in that above-mentioned protuberance is Part-spherical.
5. the ball-screw apparatus as according to any one of Claims 1-4, it is characterised in that above-mentioned holding member is by metal Material is formed.
6. ball-screw apparatus as claimed in claim 2, it is characterised in that blocked mutually with above-mentioned curved face part by above-mentioned protuberance Close and carry out the above-mentioned holding member location relative to above-mentioned circulation member.
7. the ball-screw apparatus described in any one as claimed in claim 1, it is characterised in that above-mentioned circulation member is fixed on above-mentioned Nut, the most above-mentioned snap fastener engages, and the most above-mentioned holding member is fixed in above-mentioned nut.
8. ball-screw apparatus as claimed in claim 1, it is characterised in that above-mentioned snap fastener includes: in the assembled state It is formed at the first ridge and second ridge in the face of the outside diameter of above-mentioned circulation member；And be formed at above-mentioned holding member and The first groove portion that above-mentioned first ridge fastens and the second groove portion fastened with above-mentioned second ridge.
9. ball-screw apparatus as claimed in claim 8, it is characterised in that above-mentioned first ridge and above-mentioned first groove portion are in group The direction extended at the predetermined string of above-mentioned nut under dress state extends.
10. ball-screw apparatus as claimed in claim 8, it is characterised in that
At the perisporium of above-mentioned nut, it is formed with the accepting groove housing above-mentioned holding member；
It is the most prominent that above-mentioned first ridge has the outer edge in the face of the above-mentioned outside diameter than above-mentioned circulation member Protuberance；
Above-mentioned limiting unit is above-mentioned protuberance, is contacted with the bottom surface of above-mentioned accepting groove by the face of the internal side diameter of above-mentioned protuberance Limit the movement that above-mentioned circulation member is inwardly square to footpath relative to above-mentioned nut.
11. ball-screw apparatus as claimed in claim 10, it is characterised in that the face of the above-mentioned internal side diameter of above-mentioned protuberance with The face of the above-mentioned outside diameter of above-mentioned circulation member is formed at grade.
12. ball-screw apparatus as claimed in claim 8, it is characterised in that above-mentioned second ridge and above-mentioned second groove portion exist Axially extending at above-mentioned nut under assembled state.
13. ball-screw apparatus as claimed in claim 8, it is characterised in that by above-mentioned first ridge and above-mentioned first groove Portion fastens and carries out above-mentioned circulation member and determine relative to the phase place of above-mentioned nut.
14. ball-screw apparatus as claimed in claim 8, it is characterised in that by above-mentioned second ridge and above-mentioned second groove Portion fastens and carries out the above-mentioned holding member location relative to above-mentioned circulation member.
15. ball-screw apparatus as claimed in claim 8, it is characterised in that at above-mentioned nut and above-mentioned holding member, be provided with For by above-mentioned holding member engaging in the locking mechanism of above-mentioned nut.
16. ball-screw apparatus as claimed in claim 15, it is characterised in that above-mentioned locking mechanism is formed at accepting groove Locking groove and be formed at above-mentioned holding member the locking ridge fastened with above-mentioned locking groove, above-mentioned accepting groove is arranged on The perisporium of above-mentioned nut, houses above-mentioned holding member.
17. ball-screw apparatus as claimed in claim 15, it is characterised in that above-mentioned locking mechanism is formed at accepting groove Tapered portion and be formed at above-mentioned holding member and tapered portion that the above-mentioned tapered portion with above-mentioned accepting groove fastens, above-mentioned receipts Tank is arranged on the perisporium of above-mentioned nut, houses above-mentioned holding member.
18. ball-screw apparatus as claimed in claim 8, it is characterised in that above-mentioned holding member is by resin formation.
19. ball-screw apparatus as claimed in claim 1, it is characterised in that
At above-mentioned nut, it is formed with the installing hole for installing above-mentioned circulation member；
The above-mentioned circulation member being inserted into above-mentioned installing hole is fixed by above-mentioned holding member；
Above-mentioned limiting unit is formed at above-mentioned circulation member, engaging in above-mentioned nut to limit above-mentioned circulation member to radial outside The claw of movement；
Above-mentioned snap fastener includes being formed at above-mentioned circulation member and for installing the holding section of above-mentioned holding member and being formed In above-mentioned holding member and the engaged part of the above-mentioned holding section being sticked in above-mentioned circulation member；
The above-mentioned installing hole of above-mentioned nut has hole portion and the countersink region that can be fitted together to above-mentioned circulation member, has been installed on above-mentioned The above-mentioned holding member of the above-mentioned holding section of circulation member is connected to this countersink region to limit above-mentioned circulation member to radially inner side Movement.
20. ball-screw apparatus as claimed in claim 19, it is characterised in that
The above-mentioned holding section of above-mentioned circulation member includes being arranged at the axle portion of the outer aspect of above-mentioned circulation member and than above-mentioned axle Portion is thick and is arranged at the head on top in above-mentioned axle portion, and the outer aspect of above-mentioned circulation member is on above-mentioned circulation member has been installed on The radial outside of above-mentioned nut it is positioned at when stating nut；
The above-mentioned engaged part of above-mentioned holding member includes the opening that can be sticked in the above-mentioned holding section of above-mentioned circulation member.
21. ball-screw apparatus as claimed in claim 20, it is characterised in that above-mentioned holding member is above-mentioned above-mentioned nut Elastic deformation between countersink region and the above-mentioned head of above-mentioned circulation member and to the radial outside of above-mentioned nut to above-mentioned circulation portions Part exerts a force.
22. ball-screw apparatus as claimed in claim 21, it is characterised in that
The above-mentioned outer aspect of above-mentioned circulation member is formed as Long Circle；
Above-mentioned holding member includes rectangular plate-shaped member, and the length of length direction is than the above-mentioned outer aspect of above-mentioned circulation member The length of width long.
23. ball-screw apparatus as claimed in claim 22, it is characterised in that the length of the length direction of above-mentioned holding member Shorter than the length of the length direction of the above-mentioned outer aspect of above-mentioned circulation member, upper than above-mentioned circulation member of the length of width The length of the width stating outer aspect is short.
24. ball-screw apparatus as claimed in claim 22, it is characterised in that
At the above-mentioned outer aspect of above-mentioned circulation member, it is formed with the groove portion extended along width；
Above-mentioned holding member is received in above-mentioned groove portion, thus limits above-mentioned holding member and rotates centered by above-mentioned holding section.
25. ball-screw apparatus as claimed in claim 24, it is characterised in that
At the above-mentioned outer aspect of above-mentioned circulation member, in formation peak, the both sides portion in above-mentioned groove portion；
The top in above-mentioned peak portion the above-mentioned outer aspect relative to above-mentioned circulation member length direction tilt direction extend and It is parallel to each other.
26. ball-screw apparatus as claimed in claim 22, it is characterised in that
Above-mentioned hole portion and the above-mentioned countersink region of above-mentioned nut are concentric；
Above-mentioned hole portion is the oblong through hole that can be fitted together to above-mentioned circulation member；
Above-mentioned countersink region is circular and diameter is bigger than the length of the length direction of above-mentioned holding member.
The circulation member installation method of 27. 1 kinds of ball-screw apparatus, this ball-screw apparatus is the rolling described in claim 19 Ballscrew device, it is characterised in that
Above-mentioned circulation member is inserted in from radially inner side the above-mentioned installing hole of above-mentioned nut；
Above-mentioned holding member is inserted in the above-mentioned installing hole of above-mentioned nut from radial outside and is installed on above-mentioned circulation member.
The circulation member installation method of 28. 1 kinds of ball-screw apparatus, this ball-screw apparatus is the rolling described in claim 23 Ballscrew device, it is characterised in that
Above-mentioned holding member is installed on above-mentioned circulation member so that the length direction of the above-mentioned outer aspect of above-mentioned circulation member with The length direction of above-mentioned holding member is consistent；
Above-mentioned circulation member is inserted in from radially inner side the above-mentioned installing hole of above-mentioned nut；
Above-mentioned holding member is made to rotate centered by the above-mentioned holding section of above-mentioned circulation member, so that above-mentioned circulation member is above-mentioned The length direction of outer aspect is orthogonal with the length direction of above-mentioned holding member.
CN201580010206.5A 2014-02-25 2015-02-13 Ball screw device and method for attaching circulating member of ball screw device Pending CN106030155A (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP2014-034172 2014-02-25
JP2014034172 2014-02-25
JP2014-038661 2014-02-28
JP2014038660 2014-02-28
JP2014-038660 2014-02-28
JP2014038661 2014-02-28
PCT/JP2015/053959 WO2015129485A1 (en) 2014-02-25 2015-02-13 Ball screw device and method for attaching circulating member of ball screw device

Publications (1)

Publication Number Publication Date
CN106030155A true CN106030155A (en) 2016-10-12

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CN (1) CN106030155A (en)
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WO (1) WO2015129485A1 (en)

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TWI580873B (en) * 2015-12-07 2017-05-01 上銀科技股份有限公司 Nut tube hole structure for ball screw
JP7151180B2 (en) * 2018-03-08 2022-10-12 日本精工株式会社 top type ball screw
JP7439648B2 (en) * 2020-05-29 2024-02-28 日本精工株式会社 ball screw device

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WO2015129485A1 (en) 2015-09-03
TW201540990A (en) 2015-11-01
JPWO2015129485A1 (en) 2017-03-30

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Application publication date: 20161012