CN110375046A - Ball screw structure - Google Patents
Ball screw structure Download PDFInfo
- Publication number
- CN110375046A CN110375046A CN201810332950.2A CN201810332950A CN110375046A CN 110375046 A CN110375046 A CN 110375046A CN 201810332950 A CN201810332950 A CN 201810332950A CN 110375046 A CN110375046 A CN 110375046A
- Authority
- CN
- China
- Prior art keywords
- ball
- channel
- tube body
- central axis
- cylindrical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
- F16H25/2409—Elements essential to such mechanisms, e.g. screws, nuts one of the threads being replaced by elements specially formed for engaging the screw or nut, e.g. pins, racks, toothed belts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The present invention provides a ball screw structure, include screw rod, nut, multiple balls and two-piece return pipe, screw rod includes external screw thread groove, spiro cap is set to screw rod and includes that two mounting holes and internal screw thread groove correspond to external screw thread groove and form load channel for ball rolling, two-piece return pipe is set to nut and is connected to load channel, and two-piece return pipe includes the first combined member and the second combined member；Second combined member combines with the first combined member and includes Liang Ge foot and to be inserted into each mounting hole, each foot includes cylindrical body and cylinder channel, cylinder channel runs through cylindrical body, cylindrical channel enters for each ball, and there is biasing space to move tangential direction for ball edge in cylindrical channel and enter cylindrical channel, to increase the smooth degree of ball rolling.
Description
Technical field
The invention relates to a kind of ball screw structures, and especially in relation to a kind of ball using two-piece return pipe
Screw-rod structure.
Background technique
Ball screw includes a screw rod, a nut, a return pipe and multiple balls, and spiro cap is set on screw rod and and screw rod
Between form the load channel that passes through for ball, reflux bar then be arranged on nut to guide ball, and change ball direction reaches
To the purpose of ball-recirculation.Known return pipe is made of plastic material, and reflux is made by plastic extruding forming technique
Pipe considers the difficult problem of demoulding, after return pipe can be generally divided into the symmetrical separately formed manufacture of two and half bodies, recombinant
At complete return pipe.
In the case, the spade joining section (industry is commonly called as nail) of return pipe foot can also be divided into left and right two halves, so
And ball roll operating when, change rotating direction again after spade joining section can be hit, if therefore spade joining section be split into two halves
It is be easy to cause damage, and two half-angles cognition is softened generation segment difference because of ball shock or gap, the rolling for influencing ball are smooth
Property, or even foreign body intrusion is caused, reduce the service life of ball screw.
In addition, load channel is in the shape of a spiral, therefore ball enters in return pipe to have when changing direction to roll and has some setbacks
Problem, this point also may cause stress and concentrate and damage return pipe.
In consideration of it, how effectively to improve the structure of return pipe, increase its structural strength, and improve combinative stability, then
The target made great efforts at related dealer.
Summary of the invention
The present invention provides a kind of two-piece return pipe and ball screw structure, passes through two-piece return pipe and ball screw knot
Identical structure configuration in structure, can increase the rolling smooth degree of ball.
A form according to the present invention provides a kind of ball screw structure, it includes a screw rod, a nut, multiple balls and
One two-piece return pipe.Screw rod includes an external screw thread groove；Spiro cap is set to screw rod and has one axially, and nut includes two peaces
Hole and an internal screw thread groove are filled, two mounting holes run through an ontology of nut, and each mounting hole includes a breasting end face；Internal screw thread
Groove corresponds to external screw thread groove to form a load channel, and internal screw thread groove is connected to two mounting holes and internal screw thread groove is with two
Slot edge is connected with two breasting end faces respectively；Ball is rolled in load channel.Two-piece return pipe is set to nut and is connected to negative
For lotus channel to allow each ball to enter inside two-piece return pipe, two-piece return pipe includes one first combined member and one the
Two combined members.First combined member includes one first tube body and a first lateral suture slot, and first lateral suture geosynclinal concave is set to the first tube body；
Second combined member combines with the first combined member and includes one second tube body, one second side trench and Liang Ge foot, the second pipe
Body is corresponding with the first tube body, and the second side trench is recessed to be combined into a rolling in the second tube body, the second side trench and first lateral suture slot
Pearl channel.Liang Ge foot is separately connected the opposite end of the second tube body and to be inserted into each mounting hole, and each foot includes one
Cylindrical body and a cylindrical channel, cylindrical body one end connects the second tube body and the other end supports end face comprising one and is resisted against breasting
End face, cylindrical channel form an inner wall through cylindrical body, and cylindrical channel leads to rolling from internal screw thread groove for each ball
Pearl channel, wherein inner wall is axially distant from slot edge to transport for each ball along one in one biasing space of formation in cylindrical channel
Dynamic tangential direction enters cylindrical channel.
Therefore, it allows ball edge to move tangential direction by biasing space to enter cylindrical channel, the suitable of ball rolling can be increased
Smooth degree.
According to ball screw structure above-mentioned, wherein each ball has a ball diameter value, and each cylindrical body has
One central axis, each cylindrical channel have a circle central axis and a channel diameter value, and a difference is equivalent to channel diameter value and subtracts
Ball diameter value is gone, a line of two of them circle central axis and a line of two central axis intersect, and are located at same foot
Circle central axis biasing space neighbouring compared with central axis and be less than or equal to difference with a distance of central axis.Afore-mentioned distance can
Less than or equal to 1mm and it is greater than or equal to 0.05mm.
According to ball screw structure above-mentioned, wherein each support end bread contains one first area and one second area, the firstth area
Neighbouring biasing space, the secondth area is far from biasing space.Each breasting end face includes a first segment and a second segment, and first segment is for the
One area is born against, and second segment is born against for the secondth area, and an ora terminalis length of first segment is greater than an ora terminalis length of second segment.Or first
Combined member more may include be fitted into outside one it is recessed and one in be fitted into it is recessed, it is outer be fitted into it is recessed be placed in the first tube body, outer chimeric recess is in the
The outside of one side trench and towards the second tube body, be inside fitted into it is recessed be placed in the first tube body, interior chimeric recess is in first lateral suture slot
Inside and the second tube body of direction；And second combined member also may include that an outward flange and an inward flange, outward flange are set to second
Tube body, outward flange be located at the outside of the second side trench and it is corresponding outer be fitted into it is recessed, outward flange with it is outer chimeric recessed chimeric, inward flange is arranged
In the second tube body, inward flange be located at the inside of the second side trench and it is corresponding in be fitted into recessed, inward flange chimeric recessed is fitted into interior.Or it is outer
Being fitted into recessed and outward flange can be integrally connected in a manner of ultrasonic welding, and it is interior be fitted into recessed and inward flange can be in a manner of ultrasonic welding
It is integrally connected.
According to ball screw structure above-mentioned, wherein the first combined member also may include a hole, and hole is through the first pipe
Body and be located at first lateral suture slot on the outside of；And second combined member more may include a trip, trip is convexly equipped in the second tube body, trip position
On the outside of the second side trench and position corresponds to hole, and trip includes a convex section and a dome, and convex section is protruded towards the first tube body
And there is D type section, dome connects convex section；Wherein trip passes through hole, and dome, which is limited, makes the first tube body and the second tube body
Combination.Or a section of hole can be D-shaped.
Another form according to the present invention provides a kind of ball screw structure, and it includes a screw rod, a nut, multiple balls
And a two-piece return pipe, screw rod include an external screw thread groove, spiro cap is set to screw rod and has one axial, and nut includes two
Mounting hole and an internal screw thread groove, internal screw thread groove correspond to external screw thread groove to form a load channel, and ball is in load channel
It rolls.Two-piece return pipe is set to nut and is connected to load channel to allow each ball to enter inside two-piece return pipe,
Two-piece return pipe includes one first combined member and one second combined member；Second combined member is combined with the first combined member
And include Liang Ge foot to be inserted into each mounting hole respectively, each foot includes a cylindrical body and a cylinder channel, cylinder
Channel runs through cylindrical body, and cylindrical channel enters for each ball, and there is a biasing space to supply each ball in cylindrical channel
Tangential direction, which is moved, along one enters cylindrical channel.
According to ball screw structure above-mentioned, wherein each ball has a ball diameter value, and each cylindrical body has
One central axis, each cylindrical channel have a circle central axis and a channel diameter value, and a difference is equivalent to channel diameter value and subtracts
Ball diameter value is gone, a line of two of them circle central axis and a line of two central axis intersect, and are located at same foot
Circle central axis biasing space neighbouring compared with central axis and be less than or equal to difference with a distance of central axis.
Detailed description of the invention
Fig. 1 is the stereoscopic schematic diagram according to a kind of ball screw structure of an embodiment of the present invention.
Fig. 2 is the perspective view of the explosion of the ball screw structure of Fig. 1.
Fig. 3 be Fig. 1 ball screw structure a nut and a two-piece return pipe along face line 3-3 cross-sectional view.
Enlarged partial cross section of the nut and two-piece return pipe that Fig. 4 is Fig. 3 along face line 3-3.
Cross-sectional view of the nut and two-piece return pipe that Fig. 5 is Fig. 3 along face line 4-4.
Fig. 6 is the enlarged diagram of the two-piece return pipe of the ball screw structure of Fig. 2.
Fig. 7 is the perspective view of the explosion of the two-piece return pipe of Fig. 6.
Fig. 8 is the perspective view of the explosion according to the two-piece return pipe of another embodiment of the present invention.
Fig. 9 is the combination diagram of the two-piece return pipe of Fig. 8.
Figure 10 is the perspective view of the explosion according to the two-piece return pipe of a further embodiment of this invention.
Figure 11 is the combination diagram of the two-piece return pipe of Figure 10.
Figure 12 is the partial sectional view according to a kind of ball screw structure of a further embodiment of the present invention.And
Figure 13 is the partial sectional view according to a kind of ball screw structure of a more embodiment of the invention.
Description of symbols:
100 ball screw structures
200 screw rods
210 external screw thread grooves
300 nuts
310,310c, 310d mounting hole
320 internal screw thread grooves
321 slot edge
330 bear against end face
331,331c, 331d first segment
332,332c, 332d second segment
400,400a, 400b two-piece return pipe
500, the first combined member of 500a
510, the first tube body of 510a
530,530a first lateral suture slot
It is fitted into outside 540 recessed
It is fitted into 550 recessed
560a, 560b hole
600, the second combined member of 600a
610, the second tube body of 610a
620 foots
621,621c, 621d cylindrical body
622,622c, 622d cylindrical channel
6211 spade joining sections
6212 support end face
6213 first areas
6214 second areas
6215,6215c, 6215d inner wall
630, the second side trench of 630a
640 outward flanges
650 inward flanges
660a, 660b trip
661a, 661b convex section
662a, 662b dome
B1 ball
The center C1
D1 distance
D2, D3 length
D4, D5 wall thickness
I1 central axis
I2 circle central axis
I3 is axial
L1, L2, L3, L4 line
R1 moves tangential direction
S1 biases space
1 acute angle of θ
Specific embodiment
Illustrate the embodiment of the present invention hereinafter with reference to schema.As clearly stated, the details in many practices will
It is explained in the following description.However, reader is not it will be understood that the details in these practices is applied to limit the present invention.
That is, details in these practices is non-essential in some embodiments of the present invention.In addition, being risen to simplify schema
See, some known usual structures will be painted in a manner of simply illustrating in the drawings with component；And the component of repetition can
Energy use is identically numbered expression.
Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7 are please referred to, wherein Fig. 1 is according to the one of an embodiment of the present invention
The stereoscopic schematic diagram of kind ball screw structure 100, Fig. 2 are the perspective view of the explosion of the ball screw structure 100 of Fig. 1, Fig. 3 Fig. 1
Ball screw structure 100 a nut 300 and a two-piece return pipe 400 along the cross-sectional view of face line 3-3, Fig. 4 is Fig. 3
Along the enlarged partial cross section of face line 3-3, Fig. 5 is the nut 300 and two-piece of Fig. 3 for nut 300 and two-piece return pipe 400
For return pipe 400 along the cross-sectional view of face line 4-4, Fig. 6 is the amplification of the two-piece return pipe 400 of the ball screw structure 100 of Fig. 2
Schematic diagram, Fig. 7 are the perspective view of the explosion of the two-piece return pipe 400 of Fig. 6.Ball screw structure 100 it includes a screw rod 200,
One nut 300, multiple ball B1 (see Fig. 4) and a two-piece return pipe 400.
Screw rod 200 includes an external screw thread groove 210, and nut 300 is sheathed on screw rod 200 and has an axial direction I3, nut 300
Comprising two mounting holes 310 and an internal screw thread groove 320, the corresponding external screw thread groove 210 of internal screw thread groove 320 is to form a load
Channel (not shown), ball B1 are rolled in load channel.Two-piece return pipe 400 is set to nut 300 and is connected to load
For channel to allow each ball B1 to enter inside two-piece return pipe 400, two-piece return pipe 400 includes one first combined member
500 and one second combined member 600；Second combined member 600 combines with the first combined member 500 and includes Liang Ge foot 620
To be inserted into two mounting holes 310 respectively, each foot 620 includes a cylindrical body 621 and a cylinder channel 622, cylinder letter
Road 622 runs through cylindrical body 621, and cylindrical channel 622 enters for each ball B1, and has a biasing empty in cylindrical channel 622
Between S1 (see Fig. 4) for each ball B1 move tangential direction R1 (see Fig. 4) into cylindrical channel 622 along one.
Therefore, it allows the edge ball B1 to move tangential direction R1 by biasing space S 1 to enter cylindrical channel 622, ball can be increased
The smooth degree that B1 is rolled.The CONSTRUCTED SPECIFICATION of ball screw structure 100 discussed below.
The external screw thread groove 210 of screw rod 200 refers to the arc groove structure threadingly formed on screw rod 200, in nut 300
Tubular space also can be synthesized with external screw thread groove 210 for arc groove structure in 320 structure of internal screw thread groove in portion, this one
Tubular space is load channel, is sequentially rolled through for multiple ball B1.
Mounting hole 310 on nut 300 runs through an ontology of nut 300 and includes a breasting end face 330 (see Fig. 5), interior
Thread groove 320 is connected to two mounting holes 310 and internal screw thread groove 320 is held with two respectively with two slot edge 321 (see Fig. 5)
It is connected by end face 330, and the axial I3 of the line L3 of the center C1 of two mounting holes 310 and nut 300 presss from both sides an acute angle theta 1.Change sentence
It talks about, since 320 screw thread of internal screw thread groove is distributed in the inner tubal wall of nut 300, when mounting hole 310 is along the one of nut 300
When radial (not shown) runs through the ontology of nut 300, internal screw thread groove 320 can be cut to discrete state, and this cuts
Disconnected place, which will form, bears against end face 330 and slot edge 321.
Two above-mentioned mounting holes 310 are inserted into for the Liang Ge foot 620 of two-piece return pipe 400, when screw rod 200 is with respect to spiral shell
When cap 300 rotates, ball B1 is sequentially entered the cylindrical channel 622 of a wherein foot 620 by load channel, then by another foot
620 cylinder channel 622 returns again to load channel, therefore nut 300 and screw rod 200 is allowed to can produce relative displacement.In addition, though
The present embodiment only describes a two-piece return pipe 400, but since the quantity of mounting hole 310 is four, therefore settable two two
Part formula return pipe 400, and in other embodiments, the quantity of two-piece return pipe 400 and mounting hole 310 can be set on demand,
Its sequential is set to nut 300 and guides ball B1 to recycle, and is not limited with above-mentioned exposure.
Two-piece return pipe 400 is made of the first combined member 500 and the second combined member 600, the first combination
Component 500 includes one first tube body 510 and a first lateral suture slot 530, and first lateral suture slot 530 is recessed in the first tube body 510；Second
Combined member 600 includes one second tube body 610, one second side trench 630 and Liang Ge foot 620, and the second tube body 610 and first is managed
Body 510 is corresponding, and the second side trench 630 is recessed in the second tube body 610, and the second side trench 630 is combined into first lateral suture slot 530
Ball channel, Liang Ge foot 620 are separately connected the opposite end of the second tube body 610.Pass through the first pipe of the first combined member 500
Body 510, first lateral suture slot 530, the second tube body 610 of the second combined member 600, the second side trench 630 and Liang Ge foot 620 can
To form a curved hollow tube structure to guide ball B1.
In detail, 621 one end of cylindrical body connects the second tube body 610 and the other end is supported end face 6212 comprising one and supported
In bearing against end face 330, cylindrical channel 622 is through cylindrical body 621 to form an inner wall 6215, and the column of each foot 620
Shape ontology 621 and the second tube body 610 are integrally formed, and in order to which the ball B1 of load channel to be made smoothly can enter foot
Cylindrical channel 622 in 620, cylindrical body 621 towards another foot 620 one inside have unfilled corner and allow wall thickness to successively decrease with
The corresponding external screw thread groove 210 of a spade joining section 6211 is formed, and cylindrical body 621 and external screw thread groove 210 can be made to have preferably
Joining relation with benefit guidance ball B1 enter cylindrical channel 622.
In the present embodiment, each ball B1 has a ball diameter value, and each cylindrical body 621 has a central axis
There is a circle central axis I2 and a channel diameter value, a difference to be equivalent to channel diameter value and subtract rolling for I1, each cylindrical channel 622
Pearl diameter value, a line L2 of two of them circle central axis I2 and a line L1 of two central axis I1 intersect, and are located at same
The circle central axis I2 of foot 620 compared with the neighbouring biasing space S 1 of central axis I1 and is less than or waits with a distance D1 of central axis I1
In difference.
It carefully says, in the case where ignoring spade joining section 6211, cylindrical body 621 is generally in cylindrical structure (i.e. column
The projected outline of ontology 621 is generally rounded) and there is central axis I1 (this center is equivalent to the center of circle), due to cylindrical channel 622
For cylindrical structure, therefore there can be circle central axis I2.And in order to generate biasing space S 1 for ball B1 by movement tangent line side
Enter cylindrical channel 622 to R1, the biasing of cylindrical channel 622 opens up in the present embodiment, that is to say, that cylindrical channel 622 and column
Ontology 621 is non-concentric, causes central axis I1 parallel with circle central axis I2 and is not overlapped, therefore wall thickness D4 is less than wall thickness D5.And
When distance D1 is less than or equal to difference, representative, which can produce enough biasing space Ss 1, moves ball B1 along tangential direction R1 is moved
It is dynamic, and the situation that ball B1 can be caused to cannot be introduced into cylindrical channel 622 to avoid the excessively biasing of cylindrical channel 622 simultaneously produces
It is raw.Preferably, distance D1 may be less than or equal to 1mm and be greater than or equal to 0.05mm.Therefore, it more can reach the effect for reducing noise
Fruit.In other figs. in unshowned embodiment, cylindrical body may be elliptical cylinder-shape structure or long elliptical cylinder-shape structure etc.,
And projected outline can be and be made of outer arc, inner arc and the line segment being connected with the two, therefore central axis is
The extension line of the central point of the center of circle of outer arc and outer arc circle center line connecting radially (radial direction of nut 300), comprising upper
State that but not limited to this.
In addition, as shown in figure 5, ball B1 can have since Liang Ge foot 620 is located at the two sides of nut 300
Move tangential direction R1 and another tangential direction (that is, two directions parallel but opposite) in contrast to movement tangential direction R1, therefore two
The biased direction of a cylinder channel 622 must be on the contrary, so that the line L2 and two central axis of two circle central axis I2
The cross-shaped state of line L1 of I1.
Further, since cylindrical body 621 is therefore the shape and mounting hole of cylindrical body 621 for being inserted into mounting hole 310
310 be mutual corresponding, and because cylindrical channel 622 has biased and to have formed biasing space S 1, mounting hole 310 is not required to bias,
And make after cylindrical body 621 is inserted into mounting hole 310, the center C1 of central axis I1 penetrating mounting holes 310.
The end face 6212 of supporting of any cylindrical body 621 may include one first area 6213 and one second area 6214, the firstth area
6213 neighbouring biasing space Ss 1, the second area 6214 include a first segment far from biasing space S 1, the breasting end face 330 of nut 300
331 and a second segment 332, first segment 331 born against for the first area 6213, second segment 332 is born against for the second area 6214, in mounting hole
In the case that 310 are not required to biasing, an ora terminalis length D2 of first segment 331 is equal to an ora terminalis length D3 of second segment 332.
The end face 6212 of supporting of cylindrical body 621 refers on 621 other end of cylindrical body far from spade joining section 6,211 1
The end face of side, and mounting hole 310 radially opens up, therefore a part of mounting hole 310 runs through the ontology of nut 300, mounting hole
310 another part does not run through the ontology of nut 300 and is formed and bear against end face 330, and bears against end face 330 close to internal screw thread groove
320 slot edge 321, the ora terminalis of first segment 331 refer to 330 edge of breasting end face positioned at 320 side of internal screw thread groove, second
The ora terminalis of section 332 is referred to positioned at 330 edge of breasting end face of 320 other side of internal screw thread groove, and the ora terminalis of first segment 331 is long
Spend the ora terminalis length D3 that D2 is equal to second segment 332.
The biasing of above-mentioned circle central axis I2 can make inner wall 6215 along axial I3 far from slot edge 321 in cylindrical channel 622
Interior formation biasing space S 1 moves tangential direction R1 for each edge ball B1 and enters cylindrical channel 622.Therefore, as shown in figure 4, working as
Ball B1 is along when moving tangential direction R1 and moving and to enter cylindrical channel 622, due to having the presence of biasing space S 1, ball B1
It can be continued to move to along tangential direction R1 is moved, avoid forcing its shock cylindrical channel 622 that directly alters course, and can increase ball B1 stream
Dynamic smooth degree, and the noise for hitting and generating can be reduced, simultaneously as hitting strength or chance reduction, and it is avoided that nut 300
And the damage of two-piece return pipe 400, and increase its service life.
Furthermore in order to which ball B1 to be allowed can more smoothly pass in and out load channel and ball channel, circle central axis I2 should
It to be biased along the direction of parallel axial direction I3, be to work as the circle central axis I2 and central axis I1 met positioned at same foot 620
When the relationship of the line L1 of line L4 and two central axis I1 folder acute angle theta 1, represents two-piece return pipe 400 and be installed on installation
The direction that circle central axis I2 is biased when hole 310 is parallel axial direction I3, and can help promotion in the movement smooth degree of ball B1.
As shown in fig. 7, first combined member 500 also may include being fitted into recessed 540 and one outside one in two-piece return pipe 400
Inside be fitted into recessed 550, it is outer to be fitted into recessed 540 and be set to the first tube body 510, it is outer be fitted into outside that recessed 540 are located at first lateral suture slot 530 and
It towards the second tube body 610, is inside fitted into recessed 550 and is set to the first tube body 510, be inside fitted into recessed 550 and be located at the interior of first lateral suture slot 530
Side and the second tube body 610 of direction；And second combined member 600 also may include an outward flange 640 and an inward flange 650, outward flange
640 are set to the second tube body 610, and outward flange 640 is located at the outside of the second side trench 630 and is fitted into recessed 540 outside corresponding to, outward flange
640 is chimeric with outer chimeric recessed 540, and inward flange 650 is set to the second tube body 610, and inward flange 650 is located at the second side trench 630
Recessed 550 are fitted into inside and correspondence, inward flange 650 is chimeric with interior chimeric recessed 550.Or be fitted into outside recessed 540 and outward flange 640 can be with
Ultrasonic welding mode is integrally connected, and it is interior be fitted into recessed 550 and inward flange 650 can be integrally connected in a manner of ultrasonic welding.
The present embodiment it is outer be fitted into recessed 540 and it is interior be fitted into recessed 550 and be arranged close to the two sides of first lateral suture slot 530, and it is outer
Flange 640 and inward flange 650 are arranged close to the two sides of the second side trench 630, and be fitted into outside recessed 540 and outward flange 640 can be with
Ultrasonic welding mode is integrally connected, and it is interior be fitted into recessed 550 and inward flange 650 can be integrally connected in a manner of ultrasonic welding, because
This will allow the first combined member 500 and the second combined member 600 affixed.In other embodiments, outer to be fitted into recessed 540 and interior chimeric
Recessed 550 can have a distance with the two sides of first lateral suture slot 530, and outward flange 640 and inward flange 650 can be with the second side trench
There is a distance more may be used so as to increase the combined strength of the first combined member 500 and the second combined member 600 for 630 two sides
Avoid separating because ball B1 is hit for the first combined member 500 and the second combined member 600.
Fig. 8 and Fig. 9 is please referred to, wherein Fig. 8 is according to the quick-fried of the two-piece return pipe 400a of another embodiment of the present invention
Fried schematic diagram, Fig. 9 are the combination diagram of the two-piece return pipe 400a of Fig. 8.The structure and Fig. 1 of two-piece return pipe 400a is extremely
400 structure of two-piece return pipe described in Fig. 7 is similar, and difference is described as follows at place.
First combined member 500a also may include a hole 560a, and hole 560a is through the first tube body 510a and is located at first
The outside of side trench 530a；And second combined member 600a also may include a trip 660a, trip 660a is convexly equipped in the second tube body
610a, trip 660a are located on the outside of the second side trench 630a and position corresponds to hole 560a, and trip 660a includes a convex section
661a and a dome 662a, convex section 661a protrude towards the first tube body 510a and have D type section, dome 662a connection convex section
661a；Wherein trip 660a passes through hole 560a, and dome 662a, which is limited, combines the first tube body 510a and the second tube body 610a.
In the present embodiment, the left and right sides of the first tube body 510a forms two thes brim of a hat, and the quantity of hole 560a is two,
Two circular cavities 560a is located on two thes brim of a hat and towards the second tube body 610a, and the left and right sides of the second tube body 610a is also formed
Two thes brim of a hat, and the quantity of trip 660a is two and corresponding hole 560a, trip 660a is located on two thes brim of a hat and court
It is protruded to the first tube body 510a.Therefore, when the first combined member 500a and the second combined member 600a is combined, trip 660a's
Dome 662a is limited after passing through hole 560a and the first tube body 510a and the second tube body 610a can not be detached from, thus complete
At the assembling of two-piece return pipe 400a.
Figure 10 and Figure 11 is please referred to, wherein Figure 10 is the two-piece return pipe 400b according to a further embodiment of this invention
Perspective view of the explosion, Figure 11 are the combination diagram of the two-piece return pipe 400b of Figure 10.The structure of two-piece return pipe 400b with
Two-piece return pipe 400a structure described in Fig. 8 and Fig. 9 is similar, the difference is that, a section of hole 560b is D-shaped, therefore
The plane that hole 560b can have convex section 661b in a plane and trip 660b supports cooperation, and is more conducive to dome
The limit of 662b.
Figure 12 is please referred to, Figure 12 is the partial cross according to a kind of ball screw structure of a further embodiment of the present invention
Figure.In the present embodiment, cylindrical channel 622c is not offseted away set on cylindrical body 621c, but mounting hole 310c biasing is allowed to open up,
That is, wall thickness D4 is equal to wall thickness D5, the ora terminalis length D2 of first segment 331c is greater than the ora terminalis length D3 of second segment 332c, because
, when cylindrical body 621c is placed in mounting hole 310c, inner wall 6215c is axially distant from slot edge and can be in cylindrical channel for this
Biasing space S 1 is formed in 622c.
Figure 13 is please referred to, Figure 13 is the partial cross according to a kind of ball screw structure of a more embodiment of the invention
Figure.In the present embodiment, cylindrical channel 622d is offseted away set on cylindrical body 621d, but the cylinder of biased direction and Fig. 1 to Fig. 5 are logical
The biased direction in road 622 is on the contrary, and mounting hole 310d is also biased and opened up.That is, wall thickness D4 is greater than wall thickness D5, first segment
The ora terminalis length D2 of the 331d ora terminalis length D2 of the ora terminalis length D3 greater than second segment 332d, wall thickness D4 less than first segment 331d and
Wall thickness D5 is greater than the ora terminalis length D3 of second segment 332d.Therefore when cylindrical body 621d is placed in mounting hole 310d, inner wall
6215d is axially distant from slot edge and can bias space S 1 in being formed in cylindrical channel 622d.Unshowned implementation in other figs.
In example, the direction that direction and the mounting hole that cylindrical channel can also be allowed to bias bias is identical, as long as inner wall can be made along axial
Biasing space is formed far from slot edge, is not limited with above-mentioned exposure.
By the above embodiments it is found that by having a biasing space to move tangent line along one for each ball in cylindrical channel
Direction enters the structure configuration of cylinder channel, and ball can be made more smoothly to enter cylindrical channel, and this biases the formation in space
Slot edge is axially distant from using inner wall and is reached, therefore mounting hole can be made with respect to the biasing of internal screw thread groove and cylindrical channel phase
Allow inner wall far from slot edge at least one of mode in cylindrical body biasing.In addition, due to the of two-piece return pipe
Two combined members include two complete foots, and then can be with reinforcement structure intensity, and while reducing noise, promotion ball
The service life of screw-rod structure.
Although the present invention is disclosed above with embodiment, however, it is not to limit the invention, any to be familiar with this skill
Person may make various changes and modifications without departing from the spirit and scope of the invention, therefore the protection scope of the present invention is worked as
Depending on after subject to attached claim institute defender.
Claims (10)
1. a kind of ball screw structure, includes:
One screw rod includes an external screw thread groove；
One nut is sheathed on the screw rod and has one axially, and the nut includes:
Two mounting holes, through an ontology of the nut, each mounting hole includes a breasting end face；And
One internal screw thread groove, the corresponding external screw thread groove is to form a load channel, described in the internal screw thread groove and two
Mounting hole is connected to and the internal screw thread groove is connected with two breasting end faces respectively with two slot edge；
Multiple balls, Yu Suoshu load channel roll；And
One two-piece return pipe is set to the nut and is connected to the load channel to allow described in each ball entrance
Inside two-piece return pipe, which is characterized in that the two-piece return pipe includes:
One first combined member includes:
One first tube body；And
One first lateral suture slot, it is recessed in first tube body；And
One second combined member combines with first combined member and includes:
One second tube body, corresponding with first tube body and include one second side trench, the first lateral suture slot and described the
Two side trench are combined into a ball channel；And
Liang Ge foot, is separately connected the opposite end of second tube body and to be inserted into each mounting hole, each described
Foot includes:
One cylindrical body, one end connects second tube body and the other end supports end face comprising one and is resisted against a breasting end
Face；And
One cylindrical channel, through the cylindrical body to form an inner wall, the cylindrical channel supplies each ball from institute
Internal screw thread groove is stated towards the ball channel；
Wherein, the inner wall is along described every to supply in one biasing space of formation in the cylindrical channel axially away from the slot edge
One ball moves tangential direction into the cylindrical channel along one.
2. ball screw structure as described in claim 1, which is characterized in that each ball has a ball diameter value,
Each cylindrical body has a central axis, and each cylindrical channel has a circle central axis and a channel diameter value,
One difference is equivalent to the channel diameter value and subtracts the ball diameter value, a line and two for circle central axis described in two of them
One line of a central axis intersects, and the circle central axis central axis positioned at the same foot is adjacent to institute
It states biasing space and is less than or equal to the difference with a distance of the central axis.
3. ball screw structure as claimed in claim 2, which is characterized in that the distance is greater than or equal to 0.05mm and is less than
Or it is equal to 1mm.
4. ball screw structure as described in claim 1, which is characterized in that each support end bread contains:
One first area, the neighbouring biasing space；And
One second area, far from the biasing space；And
Each breasting end face includes:
One first segment is born against for firstth area；And
One second segment is born against for secondth area, and an ora terminalis length of the first segment is greater than an ora terminalis of the second segment
Length.
5. ball screw structure as described in claim 1, which is characterized in that
First combined member also includes:
It is fitted into outside one recessed, is set to first tube body, outside and direction of the outer chimeric recess in the first lateral suture slot
Second tube body；And
It is fitted into recessed in one, is set to first tube body, inside and direction of the interior chimeric recess in the first lateral suture slot
Second tube body；And
Second combined member also includes:
One outward flange, is set to second tube body, and the outward flange is located at described in the outside of second side trench and correspondence
Be fitted into outside it is recessed, the outward flange with it is described outer chimeric recessed chimeric；And
One inward flange, is set to second tube body, and the inward flange is located at described in the inside of second side trench and correspondence
Inside be fitted into it is recessed, the inward flange with it is described interior chimeric recessed chimeric.
6. ball screw structure as claimed in claim 5, which is characterized in that described outer to be fitted into the recessed and described outward flange with Supersonic
Wave welding mode is integrally connected, and described interior be fitted into the recessed and described inward flange and be integrally connected in a manner of ultrasonic welding.
7. ball screw structure as described in claim 1, which is characterized in that
First combined member also includes:
One hole through first tube body and is located on the outside of the first lateral suture slot；And
Second combined member also includes:
One trip is convexly equipped in second tube body, and the trip is located on the outside of second side trench and position corresponds to the hole
Hole, the trip includes:
One convex section protrudes towards first tube body and has D type section；And
One dome connects the convex section；
Wherein the trip passes through described hole, and the dome, which is limited, combines first tube body and second tube body.
8. ball screw structure as claimed in claim 7, which is characterized in that a section of described hole is D-shaped.
9. a kind of ball screw structure, includes:
One screw rod includes an external screw thread groove；
One nut is sheathed on the screw rod and has one axially, and the nut includes two mounting holes and an internal screw thread groove, institute
It states internal screw thread groove and corresponds to the external screw thread groove to form a load channel；
Multiple balls, Yu Suoshu load channel roll；And
One two-piece return pipe is set to the nut and is connected to the load channel to allow described in each ball entrance
Inside two-piece return pipe, which is characterized in that the two-piece return pipe includes:
One first combined member；And
One second combined member combines with first combined member and includes Liang Ge foot to be inserted into each peace respectively
Hole is filled, each foot includes:
One cylindrical body；And
One cylindrical channel runs through the cylindrical body, and the cylindrical channel enters for each ball, and the cylindrical channel
Inside there is a biasing space to move tangential direction into the cylindrical channel along one for each ball.
10. ball screw structure as claimed in claim 9, which is characterized in that each ball has a ball diameter value,
Each cylindrical body has a central axis, and each cylindrical channel has a circle central axis and a channel diameter value,
One difference is equivalent to the channel diameter value and subtracts the ball diameter value, a line and two for circle central axis described in two of them
One line of a central axis intersects, and the circle central axis central axis positioned at the same foot is adjacent to institute
It states biasing space and is less than or equal to the difference with a distance of the central axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810332950.2A CN110375046B (en) | 2018-04-13 | 2018-04-13 | Ball screw structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810332950.2A CN110375046B (en) | 2018-04-13 | 2018-04-13 | Ball screw structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110375046A true CN110375046A (en) | 2019-10-25 |
| CN110375046B CN110375046B (en) | 2022-07-19 |
Family
ID=68243609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810332950.2A Active CN110375046B (en) | 2018-04-13 | 2018-04-13 | Ball screw structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110375046B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060486A (en) * | 2020-08-06 | 2022-02-18 | 银泰科技股份有限公司 | External circulation ball screw and backflow pipe structure thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4750378A (en) * | 1986-11-13 | 1988-06-14 | Sheppard Peter H | Ball screw mechanism |
| US20030123951A1 (en) * | 2001-12-05 | 2003-07-03 | Hidekazu Michioka | Circulation member of ball screw and ball screw using same |
| CN1740590A (en) * | 2004-08-06 | 2006-03-01 | 日本精工株式会社 | Ball circulating member and ball screw |
| US20060169079A1 (en) * | 2005-02-02 | 2006-08-03 | Mao-Tu Lee | Muffling structure of high-speed ball screw |
| US20110303036A1 (en) * | 2009-01-06 | 2011-12-15 | Hiwin Technologies Corp. | Ball return device for ball screw device |
| TWM442426U (en) * | 2012-08-07 | 2012-12-01 | Hiwin Tech Corp | External circulation type ball screw |
| TW201425773A (en) * | 2012-12-27 | 2014-07-01 | Hiwin Tech Corp | External circulation type ball screw with safety device |
| CN105202138A (en) * | 2014-06-20 | 2015-12-30 | 上银科技股份有限公司 | tangent type internal circulation ball screw |
-
2018
- 2018-04-13 CN CN201810332950.2A patent/CN110375046B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4750378A (en) * | 1986-11-13 | 1988-06-14 | Sheppard Peter H | Ball screw mechanism |
| US20030123951A1 (en) * | 2001-12-05 | 2003-07-03 | Hidekazu Michioka | Circulation member of ball screw and ball screw using same |
| CN1740590A (en) * | 2004-08-06 | 2006-03-01 | 日本精工株式会社 | Ball circulating member and ball screw |
| US20060169079A1 (en) * | 2005-02-02 | 2006-08-03 | Mao-Tu Lee | Muffling structure of high-speed ball screw |
| US20110303036A1 (en) * | 2009-01-06 | 2011-12-15 | Hiwin Technologies Corp. | Ball return device for ball screw device |
| TWM442426U (en) * | 2012-08-07 | 2012-12-01 | Hiwin Tech Corp | External circulation type ball screw |
| TW201425773A (en) * | 2012-12-27 | 2014-07-01 | Hiwin Tech Corp | External circulation type ball screw with safety device |
| CN105202138A (en) * | 2014-06-20 | 2015-12-30 | 上银科技股份有限公司 | tangent type internal circulation ball screw |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060486A (en) * | 2020-08-06 | 2022-02-18 | 银泰科技股份有限公司 | External circulation ball screw and backflow pipe structure thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110375046B (en) | 2022-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109835112A (en) | Resonator for wheel and method for manufacturing the same | |
| CN110375046A (en) | Ball screw structure | |
| US10549944B2 (en) | Paper-made reel | |
| US8049381B2 (en) | End cover and external rotor motor using the same | |
| ITMI970268A1 (en) | JOINT FOR PIPES | |
| US9360111B2 (en) | Piston-cylinder unit | |
| US20130181504A1 (en) | Method of forming a frontal toothing on an inner ring of a wheel hub, upset collar and wheel hub with frontal toothing thus obtained | |
| RU2472663C2 (en) | Drive propulsor | |
| JP2016095010A (en) | Power force transmission shaft | |
| CN110375045A (en) | Two-piece return pipe and ball screw structure | |
| US8302999B2 (en) | Faucet connecting structure | |
| JP2007020497A (en) | Telescopically extendable rod | |
| CN211682100U (en) | Soft muscle | |
| JP2010184781A (en) | Winding reel | |
| US20100252672A1 (en) | Spool with drive feature | |
| TWI670431B (en) | Ball screw structure | |
| JP2914421B2 (en) | Assembling type spool | |
| JP6522356B2 (en) | Power transmission shaft | |
| JP6931333B2 (en) | Underwater structure | |
| JP6568014B2 (en) | Improvement of joint structure of frame | |
| CN213176512U (en) | Guide member and crowned tooth coupling with the same | |
| JP3654440B2 (en) | Plastic wire drum | |
| JP2006292085A (en) | Ball screw mechanism | |
| KR100876034B1 (en) | Winding bobbin | |
| CN216403426U (en) | Inflatable shaft capable of preventing axial deviation of winding drum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |