CN208397127U - Can adjust automatically back-flow component position sliding rail - Google Patents

Abstract

The utility model discloses it is a kind of can adjust automatically back-flow component position sliding rail, include a linear track, one slide, two back-flow components, multiple balls and two end caps, aforementioned back-flow component is placed in slide, with one first reflow body, one second reflow body, multiple first elastic buffers portion, multiple second elastic buffers portion, multiple first reflux guidance parts, multiple second reflux guidance parts, it is formed in first, one first rounding portion and one second rounding portion on the inside of two reflow bodies, ball is placed in inside back-flow component, said end cap has 2 first reflux ends, 2 second reflux ends and it is located at first, 2 first joint portions and 2 second joint portions of two reflux end sides, first elastic buffer portion of aforementioned back-flow component is assembled on the first joint portion of end cap, the second elastic buffer portion is assembled in the second engagement of end cap In portion, the utility model structure is sturdy and entirely without segment difference, and not influencing processing quality reduces die manufacturing cost, and assembling is easier and conveniently.

Description

Can adjust automatically back-flow component position sliding rail

Technical field

The utility model relates to linear slide rail technical fields, keep ball-recirculation operation smooth in particular to one kind, no Can lead to the problem of card resistance can adjust automatically back-flow component position sliding rail.

Background technique

Linear slide rail (Linear guide) is used in the linear motion that processing object is executed on toolroom machine, for industry institute Generally use.It is a kind of known linear if TaiWan, China announces No. M552553 " linear motion mould group " new patent case Rail structure includes a linear track, a slide, multiple back-flow components, two end caps, the more a dust guard and multiple rollings Pearl.

The linear track has multiple track grooves positioned at two sides.

The slide ontology, inside have the multiple interior backflashes for corresponding to abovementioned rails slot and multiple returning through both ends of the surface Discharge orifice road, aforementioned reflux duct is respectively independent without being connected to interior backflash, and aforementioned interior backflash and abovementioned rails flute profile At multiple interior return flow lines.

Aforementioned back-flow component, the extension pipe portion for being inserted in aforementioned reflux duct is corresponded to two and two correspond to First reflux guide channel of aforementioned interior backflash.

Said end cap component has 2 second reflux guide channel corresponding with aforementioned first reflux guide channel, and plugs Enter the ball maintaining part of the strip of the interior backflash, moreover, the second reflux guide channel, aforementioned reflux of said end cap component First reflux guide channel of element respectively and the corresponding engagement in the interior return flow line of the slide ontology and reflux duct, can form four A circulation canal.And aforementioned ball maintaining part front end be equipped with one first clamping structure, bottom be equipped with one second clamping structure, two Corresponding end-cap assembly is contacted with each other using two the first clamping structures of front end, so that two ball maintaining parts are linked to be always Line, for guiding ball.

Aforementioned dust guard, be it is in long strip, the dust guard of part fills in the second clamping structure that aforementioned ball keeps bottom On, and partial dust guard is filled in the bottom side of the slide ontology, to obtain dustproof effect.

Aforementioned ball is placed in inside aforementioned circulation canal and provides shuttling movement.

To sum up, existing linear slide rail is guided using the linking of back-flow component, can no doubt assist ball in circulation canal Interior shuttling movement still, still many makes there are following so that linear slide rail obtains use the purpose of linear motion in implementation With problem:

One, aforementioned back-flow component are adopted to be plugged on the slide ontology with dock, can be no doubt connected with reflux duct, But both because of the composite structure of back-flow component and the slide ontology multi-piece type, when linear slide rail generates deviation because of mismachining tolerance When, the structure of multi-piece type instead can stress and generate offset, especially ball is at the position of revolution, it is easy to cause ball card resistance And operate and have some setbacks, further then influence processing quality.

Secondly, the component of aforementioned back-flow component and said end cap component it is various, but also professional technician is wanted to adopt with essence True assembling can be completed to align, not only time-consuming work consuming, and numerous components also increase mold opening cost on foot, thus can improve manufacture at This.

Thirdly, built bridge in the first clamping structure of round point shape using the ball maintaining part front end of two end-cap assemblies, make The ball maintaining part at both ends is engaging one another, and for guiding the structure of ball, joining place still can generate segment difference, in this way, Ball is easy card resistance in the segment difference of joining place, and ball running is caused to have some setbacks.

Utility model content

The main purpose of the utility model is to provide it is a kind of can adjust automatically back-flow component position sliding rail, by aforementioned First elastic buffer portion and the second elastic buffer portion are arranged at ball revolution, if sliding rail generates mismachining tolerance, ball fortune Offset problem can be absorbed whereby at row to revolution, make ball revolution smooth without influencing processing quality.

The another object of the utility model be to provide it is a kind of can adjust automatically back-flow component position sliding rail, due to reflux Element corresponds to the slide length and integrated elongate in shape is arranged, so, returning for the running track as ball is provided Fluid element, structure is sturdy and entirely without segment difference, and the operation of ball is quite smooth without hindrance.

A further object of the utility model be to provide it is a kind of can adjust automatically back-flow component position sliding rail, it is zero group whole Part is simplified, and without adopting precisely to align and can quickly assemble, having reduces die manufacturing cost, and assembling is easier and easily makes Use effect.

Based on this, the utility model mainly uses utilising techniques, to realize above-mentioned purpose.

It is a kind of can adjust automatically back-flow component position sliding rail, include: a linear track has and two extends along an axis And it is located at the guide groove of two sides；One slide, sleeves on the guide groove of the linear track, and has one to extend through two along the axis The opening sliding slot of end face and multiple reflux groove portions on two cell walls of the opening sliding slot；Two back-flow components are placed in the cunning In the opening sliding slot of seat, and there is one first reflow body and one second reflow body, two separately extended along the axis Positioned at the first reflow body both ends side one first elastic buffer portion, two be located at the second reflow body both ends side One second elastic buffer portion, two be located at the first reflow body both ends on first reflux guidance part, two be located at this second The second reflux guidance part on reflow body both ends, one are formed in the first rounding portion and one on the inside of first reflow body It is formed in the second rounding portion on the inside of second reflow body, which extended along the axis and with aforementioned first Reflux guidance part is connected to establish out one first return flow line, which extended along the axis and with aforementioned the Two reflux guidance parts are connected to establish out one second return flow line；Multiple balls are placed in aforementioned first return flow line and Inside two return flow lines, obtains and moved with the slide relative to the linear track, and in aforementioned first return flow line, the second reflux Shuttling movement in channel；And two end caps, it is symmetrically assembled in the both ends of the surface of the slide, and have one to correspond to the opening sliding slot Opening groove, two be located at the opening groove on the outside of first reflux end, two be located at the opening groove on the inside of second reflux end, two difference The second engagement of aforementioned second reflux end side is located at positioned at the first joint portion of aforementioned first reflux end side and two The first elastic buffer portion in portion, aforementioned back-flow component is assembled on the first joint portion of said end cap, the second elastic buffer portion It is assembled on the second joint portion of the end cap.

Further, aforementioned back-flow component is by integrally moulded made.

Further, aforementioned back-flow component also have one be connected to this first reflux guidance part and this second reflux guidance part it Between linking part and two be located at two end side of linking part clamping portion, and the end cap also have two be located at this first reflux end and Clamping groove between the second reflux end, aforementioned back-flow component are embedded in aforementioned clamping groove and aforementioned end by aforementioned clamping portion Lid is connected.

Further, it is described can the sliding rail of adjust automatically back-flow component position also include multiple lock-connecting pieces, which also has There are multiple lockholes in both ends of the surface, said end cap also has multiple perforations extended through along the axis, aforementioned interlocking Part penetrates the perforation of the end cap, and interlocking is on the lockhole of the slide.

Further, the first elastic buffer portion of first reflow body is to be located at first reflux by one first elastic slice and one The first gap between main body and first elastic slice is formed, and the first joint portion of the end cap is a card slot, the first reflux master First elastic slice of body is arranged on the card slot.

Further, the second elastic buffer portion of second reflow body is located at second reflux by one second elastic slice and one and leads The second gap between body and second elastic slice is formed, and the second joint portion of the end cap is located at the end by a clamping elastic slice and one Gap between lid main body and the clamping elastic slice is formed, and the second elastic slice of second reflow body is arranged in second joint portion Clamping elastic slice on.

Further, the first rounding portion of first reflow body be connected composition circle with the first reflux guidance part, and each the It is round that one reflux end is connected composition with each first reflux guidance part respectively, and keeps the section of first return flow line rounded, allows Ball can glidingly pass through.

Further, the second rounding portion of second reflow body be connected composition circle with the second reflux guidance part, and each the It is round that two reflux ends are connected composition with each second reflux guidance part respectively, and keeps the section of second return flow line rounded, allows Ball glidingly passes through.

Further, the slide and said end cap are all made by metal material.

Further, aforementioned back-flow component corresponds to the length of the slide and is set as elongate in shape.

After above-mentioned technological means, it be easy to cause card resistance to have some setbacks and group compared to existing linear slide rail its ball The various use problem for causing manufacturing cost to improve of part；The utility model can adjust automatically back-flow component position sliding rail, really Have effects that following and advantage:

One, the back-flow component of the utility model is integral structure, is had except guiding ball-recirculation operation, when the sliding rail When generating mismachining tolerance in use, at this point, more by the setting in the first elastic buffer portion, the second elastic buffer portion, ball is allowed Appropriateness pushes the first reflow body or the second reflow body due to deviation factor at operation to revolution, passes through the first elastic buffer portion Or the snubber in second first gap in elastic buffer portion, the second gap or gap, and circulation running that can be smooth once again, with Solve the problems, such as that the ball of existing linear slide rail is easy the use that card resistance has some setbacks.

Two, integrated elongate in shape is set since the back-flow component of the utility model corresponds to slide length, institute With when back-flow component is placed in slide, along the first rounding portion of axis extension, the second rounding portion and reflux groove portion natural shape At the running track that ball leans on, structure is sturdy and entirely without segment difference, makes ball operation unblocked, does not influence then further to add Work quality is also easy to produce segment difference and ball card resistance is caused to have some setbacks, and influences to process to solve the ball maintaining part of existing linear slide rail The use problem of quality.

Three, due to the sliding rail of the utility model, whole spare part is simplified, without adopting precisely to align and can quickly assemble, So the disadvantage various relative to existing linear slide rail its component, die cost is high, the utility model can reduce mold manufacture Cost, assembling be easier and conveniently.

Detailed description of the invention

Fig. 1 be the utility model can adjust automatically back-flow component position one preferred embodiment of sliding rail combination stereogram.

Fig. 2 is the exploded perspective view of the sliding rail.

Fig. 3 is the enlarged drawing of the back-flow component and the end cap.

Fig. 4 is the back-flow component and ball set loaded on the schematic diagram on the end cap.

Fig. 5 is the partial perspective view of the back-flow component.

Fig. 6 is the ball pushes first reflow body and makees the schematic diagram of snubber by the second elastic buffer portion.

Fig. 7 is the ball pushes second reflow body and makees the signal of snubber by the second elastic buffer portion Figure.

[symbol description]

10 linear track, 11 guide groove

12 guide groove, 20 slide

21 end face, 22 end face

The 23 open reflux of sliding slots 24 groove portions

The 25 reflux reflux groove portions of groove portions 26

27 reflux 28 lockholes of groove portion

30 back-flow component, 31 first reflow body

311 end, 32 second reflow body

321 end, 33 first elastic buffer portion

331 first elastic slice, 332 first gap

34 second elastic buffer portion, 341 second elastic slice

Flow back guidance part in 342 second gaps 35 first

36 second reflux 37 first rounding portions of guidance part

38 second rounding portion, 39 first return flow line

391 second return flow line, 392 linking part

393 clamping portion, 40 ball

50 end cap, 51 opening groove

52 first reflux ends 53 first reflux end

54 second reflux ends 55 second reflux end

56 first joint portion, 561 card slot

57 second joint portions 571 are clamped elastic slice

572 gap, 58 clamping groove

59 perforation, 60 lock-connecting piece

100 sliding rail L axis.

Specific embodiment

Referring to Fig.1 and shown in Fig. 2, the utility model can adjust automatically back-flow component position sliding rail one preferably implement Example, the sliding rail 100 include a linear track 10, a slide 20, two back-flow components 30, multiple balls 40, an end cap 50, and Multiple lock-connecting pieces 60.

The linear track 10 extends and is located at the guide groove 11,12 of two sides along an axis L with two.

The slide 20 sleeves on the guide groove 11,12 of the linear track 10, and has one to extend through along axis L The opening sliding slot 23 of both ends of the surface 21,22 and multiple section semicirculars in shape are located at the reflux on the two sides cell wall of the opening sliding slot 23 Groove portion 24,25,26,27.

Referring to shown in Fig. 2 and Fig. 3, aforementioned back-flow component 30, corresponding to the slide 20 length and be set as elongate in shape, and It is placed in the opening sliding slot 23 of the slide 20.Aforementioned back-flow component 30 has one first separately extended along axis L Reflow body 31 and one second reflow body 32, two are located at one first elasticity of 31 both ends of the first reflow body, 311 side The one second elastic buffer portion 34, two that buffer part 33, two is located at 32 both ends of the second reflow body, 321 side be located at this first The first reflux guidance part 35, two on 31 both ends 311 of reflow body is located at the second of 32 both ends 321 of the second reflow body The first rounding portion 37 and one that reflux guidance part 36, one is formed in 31 inside of the first reflow body is formed in second reflux Second rounding portion 38 of 32 inside of main body, the first rounding portion 37 are to extend along axis L and guide with aforementioned first reflux Portion 35 is connected to establish out one first return flow line 39, which extended along axis L and with aforementioned the Two reflux guidance parts 36 are connected to establish out one second return flow line 391.In addition, continuous ginseng Fig. 4, first reflow body 31 First rounding portion 37 is connected composition circle with the first reflux guidance part 35, and makes the section of first return flow line 39 in circle Ball 40 can glidingly be passed through for shape.It is held in the mouth with the second reflux guidance part 36 in second rounding portion 38 of second reflow body 32 It is round to connect composition, and keeps the section of second return flow line 391 rounded, ball 40 can glidingly be passed through.In the present embodiment, Aforementioned back-flow component 30 be by integrally moulded made, have manufacture it is simple, at low cost except, also have both preferable elasticity Buffering effect.

Aforementioned ball 40 is placed in inside aforementioned first return flow line 39 and the second return flow line 391, obtains with the slide 20 move relative to the linear track 10, and the shuttling movement in aforementioned first return flow line 39, the second return flow line 391, allow Sliding rail 100 is able to trouble-free operation.

Said end cap 50 is symmetrically assembled in the both ends of the surface 21,22 of the slide 20, and has one to correspond to the opening sliding slot 23 opening groove 51, two is located at 51 outside of opening groove and is located at the opening groove 51 in circular first reflux end 52,53, two is led Inside and the first joint portion for being located at aforementioned first reflux end 52,53 sides in circular second reflux end 54,55, two is led 56 and two be located at it is aforementioned second reflux end 54,55 sides the second joint portion 57, aforementioned back-flow component 30 first elasticity Buffer part 33 is assembled on the first joint portion 56 of said end cap 50, which is assembled in the of the end cap 50 On two joint portions 57.Moreover, continuous ginseng Fig. 4, first reflux end 52,53 is connected composition with each first reflux guidance part 35 respectively Circle, and keep the section of first return flow line 39 rounded, ball 40 can glidingly be passed through, and second reflux end 54,55 are connected composition circle with each second reflux guidance part 36 respectively, and keep the section of second return flow line 391 rounded, Ball 40 can glidingly be passed through.

Further, continue referring to shown in Fig. 4 and Fig. 5, the first elastic buffer portion 33 of first reflow body 31 is by one the One elastic slice 331 and first gap 332 between first reflow body 31 and first elastic slice 331 are formed, the end First joint portion 56 of lid 50 is a card slot 561, and the first elastic slice 311 of first reflow body 31 is to be arranged in the card slot 561 On.Second elastic buffer portion 34 of second reflow body 32 is located at second reflow body 32 by one second elastic slice 341 and one The second gap 342 between second elastic slice 341 is formed, and the second joint portion 57 of the end cap 50 is by a clamping elastic slice 571 And a gap 572 between 50 main body of end cap and the clamping elastic slice 571 forms (visible Fig. 3), the second reflux master Second elastic slice 341 of body 32 is arranged on the clamping elastic slice 571 at second joint portion 57.

Further, aforementioned back-flow component 30 also has one to be connected to the first reflux guidance part 35 and the second reflux guiding Linking part 392 and one between portion 36 are located at the clamping portion 393 at 392 both ends of linking part.And the end cap 50 also has two to be located at Clamping groove 58 between the first reflux end 52,53 and second reflux end 54,55, aforementioned back-flow component 30 passes through aforementioned Clamping portion 393 is embedded in aforementioned clamping groove 58 and is connected with said end cap 50.

In addition, as shown in Fig. 2, the slide 20 is also with multiple lockholes 28 in both ends of the surface 21,22, said end cap 50 Also there are multiple perforations 59 extended through along axis L, aforementioned lock-connecting piece 60 penetrates the perforation 59 of the end cap 50, and interlocking In on the lockhole 28 of the slide 20, so that the slide 20 is movably mounted on the linear track 10.

Therefore, the sliding rail 100 of the utility model is loaded onto group, when two back-flow components 30 have been placed in the slide 20 In open sliding slot 23 (ball 40 has been placed in inside the first return flow line 39 and the second return flow line 391), and with the linear rails Road 10 combines and then by the corresponding guide groove 11,12 for being slidedly arranged on the linear track 10 of the opening groove 51 of two end cap 50, and is engaged on In the both ends of the surface 21,22 of the slide 10, aforementioned lock-connecting piece 60 is recycled through aforementioned perforation 59 and is locked on lockhole 28, i.e., Assembling is rapidly completed.

As for when the slide 20 is run relative to the linear track 10 along axis L, aforementioned ball 40 will be along this 24,25,26,27 circular flow of reflux groove portion of slide 20 adds if sliding rail 100 is generated because of external force influence in operation When work error, ball 40 would generally generate the situation that operation has some setbacks at revolution, at this point, referring to shown in Fig. 6 and Fig. 7, ball 40 Operation will be fitted to (both ends 311,321 of the first and second reflow body 31,32) at revolution towards arrow L1 or the direction arrow L2 Spend the first reflow body 31 pushed aforementioned first reflow body 31 or the second reflow body 32(as shown in phantom or second time Flow main body 32), pass through aforementioned first gap 332 in 33 or aforementioned second elastic buffer portion 34 of aforementioned first elastic buffer portion, the The snubber in two gaps 342 or gap 572, just can running smooth once again and smoothly turn round, and can smoothly enter into aforementioned first Rounding portion 37, the second rounding portion 38 or aforementioned reflux groove portion 24,25,26,27, then it is continuously circulated operation.

It concludes above-mentioned, be easy to cause card resistance to have some setbacks compared to existing linear slide rail its ball and component is various causes The use problem that manufacturing cost improves；The utility model can adjust automatically back-flow component position sliding rail, really have it is following all More efficacy advantages, hereby column warp is as follows:

The first, the aforementioned back-flow component 30 of the utility model has guiding 40 circular flow of ball by integral structure Except, when the sliding rail 100 generates mismachining tolerance in use, at this point, more by aforementioned first elastic buffer portion 33, the second bullet Property buffer part 34 setting, allow the operation of ball 40 at revolution due to deviation factor appropriateness push aforementioned first reflow body 31 or Second reflow body 32 passes through aforementioned first gap in 33 or aforementioned second elastic buffer portion 34 of aforementioned first elastic buffer portion 332, the snubber (see Fig. 6 and Fig. 7) in the second gap 342 or gap 572, and circulation running that can be smooth once again, to solve The ball of existing linear slide rail is easy the use problem that card resistance has some setbacks.

The second, integrated elongate in shape is set since aforementioned back-flow component 30 corresponds to 20 length of slide, institute With when back-flow component 30 is placed in the slide 20, along the aforementioned first rounding portion 37 of axis L extension, the second rounding portion 38 The running track leaned on the aforementioned ball 40 of aforementioned reflux 24,25,26,27 self-assembling formation of groove portion, structure are sturdy and entirely without section Difference makes ball operation unblocked, does not influence processing quality then further, easy with the ball maintaining part for solving existing linear slide rail It generates segment difference and ball card resistance is caused to have some setbacks, and the use problem of derivative processing quality.

Third, the sliding rail 100 due to the utility model, whole spare part are simplified, without adopting with precisely align can be quick Assembling, so the disadvantage various relative to existing linear slide rail its component, die cost is high, the utility model can reduce mold Manufacturing cost, assembling be easier and conveniently.

It is noted that though aforementioned first elastic buffer portion 33 and the second elastic buffer portion 34 are in the utility model with bullet Chip architecture is better embodiment, but not and as limitation, in addition, aforementioned flexible buffer part also can using dovetail slot structure, The fit systems such as concaveconvex structure are all worked as included in the utility model as long as can reach the buffering effect for absorbing elastic deviation In, figure does not disclose.

The above, only the utility model a preferred embodiment, when the utility model cannot be limited with this The range of implementation, i.e., it is all according to simple equivalence changes made by present utility model application the scope of the patents and novel description with repair Decorations should still belong in the range of the utility model patent covers.

Claims (10)

1. one kind can adjust automatically back-flow component position sliding rail, which is characterized in that include:

One linear track, the guide groove for extending along an axis and being located at two sides with two；

One slide, sleeves on the guide groove of the linear track, and extends through the open of both ends of the surface along the axis with one and slide Slot and multiple reflux groove portions on two cell walls of the opening sliding slot；

Two back-flow components are placed in the opening sliding slot of the slide, and have one first time separately extended along the axis It flows main body and one second reflow body, two be located at one first elastic buffer portion of the first reflow body both ends side, two In the second reflow body both ends side one second elastic buffer portion, two be located on the first reflow body both ends the One reflux guidance part, two be located at the second reflow body both ends on second reflux guidance part, one be formed in this first reflux The first rounding portion and one on the inside of main body are formed in the second rounding portion on the inside of second reflow body, which is Extend along the axis and is connected with aforementioned first reflux guidance part to establish out one first return flow line, the second rounding portion It is to extend along the axis and be connected with aforementioned second reflux guidance part to establish out one second return flow line；

Multiple balls are placed in inside aforementioned first return flow line and the second return flow line, are obtained as the slide is relative to the line Property track movement, and the shuttling movement in aforementioned first return flow line, the second return flow line；And

Two end caps are symmetrically assembled in the both ends of the surface of the slide, and are corresponded to the opening groove of the opening sliding slot with one, two are located at The first reflux end on the outside of the opening groove, two are located at the second reflux end on the inside of the opening groove, two are located at aforementioned first time Flow end side the first joint portion and two be located at it is aforementioned second reflux end side the second joint portion, aforementioned back-flow component The first elastic buffer portion be assembled on the first joint portion of said end cap, which is assembled in the of the end cap On two joint portions.

2. as described in claim 1 can adjust automatically back-flow component position sliding rail, it is characterised in that: aforementioned back-flow component is By integrally moulded made.

3. as described in claim 1 can adjust automatically back-flow component position sliding rail, it is characterised in that: aforementioned back-flow component is also First linking part and two to flow back between guidance part and the second reflux guidance part is connected to positioned at the linking part two with one The clamping portion of end side, and the end cap also has two clamping grooves being located between the first reflux end and the second reflux end, it is aforementioned Back-flow component is embedded in aforementioned clamping groove by aforementioned clamping portion and is connected with said end cap.

4. as described in claim 1 can adjust automatically back-flow component position sliding rail, it is characterised in that: also include multiple interlockings Part, the slide also have multiple lockholes in the both ends of the surface, and said end cap also has multiple to be extended through along the axis Perforation, aforementioned lock-connecting piece penetrates the perforation of the end cap, and interlocking is on the lockhole of the slide.

5. as described in claim 1 can adjust automatically back-flow component position sliding rail, it is characterised in that: first reflow body The first elastic buffer portion be by one first elastic slice and one between first reflow body and first elastic slice first between Gap is formed, and the first joint portion of the end cap is a card slot, and the first elastic slice of first reflow body is arranged on the card slot.

6. as described in claim 1 can adjust automatically back-flow component position sliding rail, it is characterised in that: second reflow body The second elastic buffer portion by one second elastic slice and second gap between second reflow body and second elastic slice It is formed, the second joint portion of the end cap is by a clamping elastic slice and a gap between the end cover body and the clamping elastic slice It is formed, the second elastic slice of second reflow body is arranged on the clamping elastic slice at second joint portion.

7. as described in claim 1 can adjust automatically back-flow component position sliding rail, it is characterised in that: first reflow body The first rounding portion be connected that composition is round, and flow back with each first guidance part respectively at each first reflux end with the first reflux guidance part Linking composition is round, and keeps the section of first return flow line rounded, and ball can glidingly be passed through.

8. as described in claim 1 can adjust automatically back-flow component position sliding rail, it is characterised in that: second reflow body The second rounding portion be connected that composition is round, and flow back with each second guidance part respectively at each second reflux end with the second reflux guidance part Linking composition is round, and keeps the section of second return flow line rounded, and ball is allowed glidingly to pass through.

9. as described in claim 1 can adjust automatically back-flow component position sliding rail, it is characterised in that: the slide and aforementioned end Lid is all made by metal material.

10. as described in claim 1 can adjust automatically back-flow component position sliding rail, it is characterised in that: aforementioned back-flow component It corresponds to the length of the slide and is set as elongate in shape.