CN104832627B

CN104832627B - Linear actuator

Info

Publication number: CN104832627B
Application number: CN201410047711.4A
Authority: CN
Inventors: 朱永钦
Original assignee: Hiwin Technologies Corp
Current assignee: Hiwin Technologies Corp
Priority date: 2014-02-11
Filing date: 2014-02-11
Publication date: 2017-09-01
Anticipated expiration: 2034-02-11
Also published as: CN104832627A

Abstract

The invention discloses a kind of linear actuator, it mainly constitutes return flow line through the first backflow half for respectively becoming hollow square frame and the second backflow half docking and is set in slide rail, sliding block is coordinated to be connected to the second backflow half again, sliding block is constituted load path with slide rail and is connected return flow line and form complete circulating path, the present invention only needs three components to constitute complete circulating path for the rolling of rolling member Infinite Cyclic, assembling difficulty is low and can improve production efficiency and economic benefit, and first backflow half with the second backflow half backflash is without offset and can reduce the collision of moving part and the generation of noise, improve life of product and quality.

Description

Linear actuator

Technical field

The present invention relates to linear actuator, it is relevant with the structure of linear actuator.

Background technology

Linear slide rail, its characteristic that is accurate and being stably driven makes it be widely used in each field, and before how reducing The production cost at end is to increase economic efficiency, the developing direction endeavoured by this area；Therefore, as shown in Figure 1 to be a kind of common Linear slide rail 10, its mainly include a slide rail 11, a sliding block 12, two refluxes 13,14 and end face sealing 15, the cunning Block 12, which slippingly covers, to be overlying on outside the slide rail 11, and the both sides of the sliding block 12 form a crossbeam 121, each bottom side of crossbeam 121 respectively For an arc groove 122；Two refluxes 13,14 constitute L-shaped state by outer end cap 131,141 and return current rail portion 132,142 respectively Sample, two refluxes 13,14 are assembled in the two ends of the sliding block 12 respectively, and make the return current rail portion of two refluxes 13,14 132nd, 142 flowed back with each arc groove 122 formation loop footpath for rolling element；And the end face sealing 15 then covers and is overlying on two backflows dress again 13,14 outer formed are put to position.

The linear slide rail reduces overall number of components by the configuration integration end cap of the reflux and the first backflow part Amount, reduces assembly cost；However, by the return flow path of the linear slide rail is made up of the docking of two refluxes, two backflows The return current rail portion joining place of device is also easy to produce offset, and produces noise when backflow, so again the linear slide rail must be had Standby high precision, produces the difficulty in manufacture and improves manufacturing cost simultaneously, therefore still have improved necessity.

The content of the invention

The technical problems to be solved by the invention are to provide a kind of linear actuator, and it is to improve normal linear slide rail Component is more, production difficulty high, assemble missing that is time-consuming and being also easy to produce noise.

To solve the above problems, the present invention provides a kind of linear actuator, comprising：

One slide rail, strip is extended to along a direction of principal axis, and the both sides of the slide rail axially set a rolling channel respectively；

One first backflow half, integrally formed two relative outer end caps and 2 first relative backflow portions are simultaneously constituted square Framework, and the two outer end covers Ju You not one first grooving；2 first refluxing portions do not set one first backflash；This With 2, first grooving is slippingly set in outside the slide rail one backflow half；

One second backflow half, integrally formed two relative inner caps and 2 second relative backflow portions are simultaneously constituted square Framework, two inner covers do not place restrictions on face extension shaping two by one and guide positioning convex portion, and respectively the guiding positioning convex portion has respectively There is the guiding face of half arc surface, the guiding face that the inner cap connects the two guiding positioning convex portions opens up one second grooving, and Respectively the second backflow portion and there is second backflash for axially extending and being connected the guiding face respectively；Second backflow half Part is inserted between the two outer end caps and is slippingly set in the slide rail with second grooving, and the guiding face be connected this One backflash, second backflash connects first backflash, and this is placed restrictions on face and set in face of first backflash, and this is first time Chute coordinate second backflash and this place restrictions on face constitute return flow line；And

One sliding block, defines one comprising a top surface and two relative sidepieces, between two sidepieces and axially extends Grooving, the relative one side of two sidepieces axially sets a rolling groove respectively, and the sliding block is placed between the two inner caps, And be slideably set in outside the slide rail with the grooving, and rolling groove constitutes load path in face of the rolling channel, while linking should Guiding face with return flow line to connect, then load path is connected unlimited for multiple rolling members as a circulating path with return flow line Circulating rolling.

The present invention is through the stacking group for being formed separately flowed back for the first of square hollow frame half and the second backflow half Conjunction can constitute return flow line, then coordinate placing for sliding block to be connected to form complete circulating path, and integrated member simplifies, energy Assembling procedure is greatly reduced, production efficiency is improved, meanwhile, first time in the backflow half of the present invention first and the second backflow half Collision during rolling member displacement can be greatly reduced completely without offset in chute and the second backflash, and the generation of reduction noise is simultaneously same Shi Tigao lives of product.

Brief description of the drawings

Fig. 1 is the structural representation of normal linear slide rail.

Fig. 2 is the stereochemical structure decomposing schematic representation of linear actuator of the present invention.

Fig. 3 is the second backflow half schematic perspective view of linear actuator of the present invention.

Fig. 4 is the part-structure combination diagram of linear actuator of the present invention.

Fig. 5 combines schematic appearance for the three-dimensional of linear actuator of the present invention.

Fig. 6 is the planar structure decomposing schematic representation of linear actuator of the present invention.

Fig. 7 is the assembled sectional view of linear actuator of the present invention.

Fig. 8 is another assembled sectional view of linear actuator of the present invention.

Fig. 9 is the three-dimensional combination appearance figure of another embodiment of linear actuator of the present invention.

Figure 10 is another embodiment combined planar outside drawing of linear actuator of the present invention.

Description of reference numerals

The slide rail 11 of linear slide rail 10

The crossbeam 121 of sliding block 12

The reflux 13 of arc groove 122

The return current rail portion 132 of outer end cap 131

The outer end cap 141 of reflux 14

The end face sealing 15 of return current rail portion 142

The rolling channel 21 of slide rail 20

The first backflow outer end cap 31 of half 30

The arc convex portion 312 of first grooving 311

The backflow portion 32 of location division 313 first

The resistance portion 331 of first radial indent 33

The backflash 34 of location indentations 332 first

Linear displacement 341 reflux sections 342 of section

The stopper slot 36 of medial surface 35

It is spacing to wear the backflow half 40 of mouth 37 second

Inner cap 41 places restrictions on face 411

Second grooving 412 coordinates location division 413

The backflow portion 42 of positioning convex portion 414 second

Second backflash 421 guides positioning convex portion 43

The inner side cambered surface 432 of guiding face 431

Hold the outside cambered surface 434 of cambered surface 433

The sliding block 50 of second radial indent 44

The sidepiece 52 of top surface 51

The outer side slot 522 of rolling groove 521

Grooving 53 covers location division 54

The locking piece 70 of rolling member 60

Direction of principal axis X radial directions Y

Embodiment

The preferred embodiment of linear actuator of the present invention as shown in Fig. 2 to 10, comprising：

One slide rail 20, strip is extended to along a direction of principal axis X, and axially X sets one respectively for the both sides of the slide rail 20 Rolling channel 21, and vertical axis X is defined as radial direction Y.

One first backflow half 30, the backflow portion 32 of integrally formed two outer end cap 31 and 2 first, the two outer end caps 31 Relatively, and the 2 first backflow portions 32 are relative and two ends positioned at the two outer end caps 31 between, make the two outer end caps 31 with The 2 first backflow portions 32 are configured to square hollow frame, and the 2 first backflow portions 32 are less than two in the height on radial direction Y The outer end cap 31 thereby makes respectively to be formed between the first backflow portion 32 and the outer end cap 31 at two ends in the height on radial direction Y One first radial indent 33；And two the outer end cap 31 respectively have one first grooving 311, the first set of the two outer end caps 31 Groove 311 is relative, and respectively the opposite side of first grooving 311 is formed separately an arc convex portion 312, the opening of 2 first groovings 311 Direction and the opening of first radial indent 33 are in opposite direction.

The relative side in the two first backflow portions 32 of outer end cap 31 and 2 is defined as inner side, and opposite side is outside, two The inner side of the outer end cap 31 is formed separately multiple location divisions 313, and the location division 313 of the present embodiment is recessed for semi arch, and two should The inner side in the first backflow portion 32 sets one first backflash 34 respectively, and respectively first backflash 34 is by an axially X extensions The reflux section 342 that 341 two ends of linear displacement section are respectively communicated with an arc is constituted, and respectively first backflash 34 and first footpath To having a medial surface 35 between recess 33, the medial surface 35 is plane, and respectively the first backflow portion 32 is in first backflash Depression sets a stopper slot 36 on 34, and the stopper slot 36 is more through setting one spacing to wear mouth 37；And the 2 first backflow portions 32 Outside more by first radial indent 33 be recessed again shaping one resistance portion 331, the resistance portion 331 be trough body structure, this implementation The resistance portion 331 of example is the groove of many scalariforms；With 2, first grooving 311 is slippingly set in this to the first backflow half 30 Outside slide rail 20, and the arc convex portion 312 of the first backflow half 30 is set slippingly to be placed in the rolling channel 21 of the slide rail 20.

One second backflow half 40, integrally formed relative two inner caps 41 and 2 second relative backflow portions 42 and structure Squarely hollow frame, two inner caps 41 have two guiding positioning convex portions 43 respectively, and the guiding positioning convex portion 43 is interior by this The one of end cap portions 41 place restrictions on face 411 extension shaping, the two guiding positioning convex portions 43 have a guiding face 431, the guiding face 431 according to Sequence constitutes half arc surface by an inner side cambered surface 432, the outside cambered surface 434 of one end cambered surface 433 and one being mutually connected, second backflow The extension of inner side cambered surface 42 that the inner cap 41 of half 40 connects the two guiding positioning convex portions 43 opens up one second grooving 412, and The 2 second backflow portions 42 are then configured to an arc chip architecture along the profile of the outside cambered surface 434 of the two guiding positioning convex portions 43 respectively And axially X development lengths to be linked between the two inner caps 41, and make the 2 second backflow portions 42 respectively have one Second backflash 421 of axially X extensions, and second backflash 421 is connected the outside cambered surface 434, and make two the inners The second backflow portion 42 of cap 41 and 2 turns into square hollow frame, the two inner caps 41 and 2 phases of second backflow portion 42 To side be inner side, opposite side is outside, and the 2 second backflow portions 42 are less than the two inner caps in the height on radial direction Y 41 in the height on radial direction Y, thereby makes respectively to form one second between the second backflow portion 42 and the inner cap 41 at two ends radially Recess 44；And the opening direction of 2 second radial indents 44 and the opening of second grooving 412 are in opposite direction；And two the inners The outside of cap 41 more shapes multiple cooperation location divisions 413, the location division of the corresponding respectively outer end cap 31 in the cooperation location division 413 313 shape formable, the present embodiment volume coordinates location division 413 to be that semi arch is convex.

It is described second backflow half 40 be inserted in this first backflow half 30 the two outer end caps 31 between, make this second Cooperation location division 413 positioning of backflow half 40 is placed in the location division 313 of the first backflow half 30；Second backflow half 40 Guiding positioning convex portion 43 be placed in the stopper slot 36 of the first backflow half 30, and second grooving 412 is slippingly worn It is placed on the slide rail 20, and the free end in the second backflow portion 42 is abutted against in the medial surface 35 of the first backflow half 30, meanwhile, this The outside cambered surface 434 of the guiding positioning convex portion 43 of two backflow half 40 is connected linear displacement section 341, second backflash 421 The linear displacement section 341 of first backflash 34 is connected, the end cambered surface 433 is connected the reflux section 342, and this places restrictions on face 411 In face of the reflux section 342 of first backflash 34, thereby make linear displacement section 341, the reflux section 342 of first backflash 34 Coordinate second flow back the guiding face of guiding positioning convex portion 43 of half 40, the second backflash 421 and this place restrictions on face 411 and constitute back Circulation road；The two inner caps 41 are abutted against in the first radial indent 33 of the first backflow half 30 simultaneously.

One sliding block 50, is to define one along axle side between two sidepieces 52 comprising a top surface 51 and two relative sidepieces 52 The grooving 53 extended to X, axially X sets a rolling groove 521 to the relative one side of two sidepieces 52 respectively, and opposite side is then distinguished Axially X opens up an outer side slot 522, and top surface 51 and the outer side slot 522 of the sliding block 50 joining place then more radially Y into Shape one covers location division 54, and the sliding block 50 is placed between two inner caps 41 of the second backflow half 40, and makes two to be somebody's turn to do Sidepiece 52 is stretched between two inner cap 41 and 2 second backflow portions 42 of the second backflow half 40, and with the grooving 53 Slideably it is set in outside the slide rail 20, and the rolling groove 521 of the sliding block 50 is constituted in face of the rolling channel 21 of the slide rail 20 and bears Lotus path, while being connected the inner side cambered surface 432 of the second backflow half 40 to connect with return flow line；Thereby, load path with Return flow line linking turns into a complete circulating path and rolled for multiple Infinite Cyclics of rolling member 60；And the outer side slot of the sliding block 50 522 can correspond to set and be overlying on the second radial indent 44 of the second backflow half 40 and stick in the outer formation in the second backflow portion 42 Positioning, meanwhile, the covering location division 54 correspondence set of the sliding block 50 is overlying on the resistance portion 331 of the first backflow half 30；And

Multiple locking pieces 70, lock is formed by the first backflow half 30 through the second backflow half 40 and the sliding block 50 It is fixed.

It is the structural configuration and feature of linear actuator of the present invention above, and during its assembling, as long as first by this first time Stream half 30 is set on the slide rail 20, the second backflow half 40 and the sliding block 50 is then sequentially inserted again, finally with locking Part 70 can complete assembling through the first backflow half 30, second backflow half 40 and the sliding block 50 is locked.

And the present invention is worn through the first backflow half 30 for forming square frame form respectively and the second backflow docking of half 40 The configuration mode of set and the number of components can be greatly decreased, through the first backflow backflow half 40 and sliding block 50 3 of half 30, second Individual component can constitute complete circulating path, during assembling, and the second backflow half 40 is to be placed directly within the first backflow half 30 the first radial indent 33, and the sliding block 50 is the second radial indent 44 for being directly placed in the second backflow half 40, is put Backflash, guiding face afterwards on each component is to produce linking, and assembling difficulty is low and can improve packaging efficiency.

Furthermore, because the first backflow backflow of half 30, second half 40 of the present invention is one-piece as square hollow frame Body, the first backflow half 30 and the first backflash 34 and the second backflash 421 in the second backflow half 40 do not break completely Difference, occurs noise when rolling member 60 can be avoided to move completely, while can also reduce the collision between rolling member 60 and component, improves whole Body component's life.

In addition, again please refer to Fig. 9,10, to strengthen between the first backflow half 30 and the second backflow half 40 Combinative stability, more can be in axially X opens up a location indentations again in the first radial indent 33 of the first backflow half 30 332, and then axially X shapes a positioning convex portion 414 to the inner cap 41 of the second backflow half 40, then when second backflow When half 40 is assembled in the first backflow half 30, positioning convex portion 414 of the second backflow half 40 can coordinate receive into this The location indentations 332 of one backflow half 30, thereby more improve the structural stability after assembling, and can reach with above taking off embodiment phase Same purpose and effect.

Claims

1. a kind of linear actuator, it is characterised in that：Comprising：

One slide rail, strip is extended to along a direction of principal axis, and the direction of principal axis both sides of the slide rail axially set one to roll respectively Ditch；

One first backflow half, integrally formed two relative outer end caps and 2 first relative backflow portions simultaneously constitute square box Frame, and the two outer end covers Ju You not one first grooving；2 first refluxing portions do not set one first backflash；This first With 2, first grooving is slippingly set in outside the slide rail half that flows back；

One second backflow half, integrally formed two relative inner caps and 2 second relative backflow portions simultaneously constitute square box Frame, two inner covers do not place restrictions on face extension shaping two by one and guide positioning convex portion, and respectively the guiding positioning convex portion has respectively The guiding face of half arc surface, the guiding face that the inner cap connects the two guiding positioning convex portions opens up one second grooving, and respectively The second backflow portion simultaneously has second backflash for axially extending and being connected the guiding face respectively；The second backflow half Be inserted between the two outer end caps and the slide rail be slippingly set in second grooving, and the guiding face be connected this first Backflash, second backflash connects first backflash, and this is placed restrictions on face and set in face of first backflash, first backflow Groove coordinate second backflash and this place restrictions on face constitute return flow line；And

One sliding block, is to define a grooving axially extended comprising a top surface and relative both sides, between two sidepieces, The relative side of two sidepieces axially sets a rolling groove respectively, and the sliding block is placed between the two inner caps, and with The grooving is slideably set in outside the slide rail, and rolling groove constitutes load path in face of the rolling channel, while being connected the guiding Face with return flow line to connect, then load path is connected with return flow line supplies multiple rolling member Infinite Cyclics as a circulating path Roll；

Respectively the first backflow portion of the first backflow half sets a stopper slot in being recessed on first backflash, and second time The guiding positioning convex portion of stream half is placed in the stopper slot of the first backflow half.

2. linear actuator as claimed in claim 1, it is characterised in that：The first backflow half and second backflow half Part respectively becomes hollow square frame, and the opposite side of respectively first grooving of the first backflow half is formed separately an arc convex portion, The arc convex portion of the first backflow half is slippingly placed in the rolling channel of the slide rail.

3. linear actuator as claimed in claim 1, it is characterised in that：Two outer end caps of the first backflow half Inner side be formed separately multiple location divisions, this second backflow half the two inner caps it is relative with the two second backflow portions one Side is inner side, and opposite side is outside, and the outside of the two inner caps more shapes multiple cooperation location divisions；And the location division is semicircle Arc is recessed, and the cooperation location division is that semi arch is convex, and the cooperation location division positioning of the second backflow half is placed in the first backflow half In the location division of part.

4. linear actuator as claimed in claim 1, it is characterised in that：The stopper slot more through set one it is spacing wear mouth, And the two of the sliding block sidepiece stretch into the second backflow half the two inner caps and the two second backflow portions between it is spacing Mouth is worn, and further includes multiple locking pieces and forms locking through the second backflow half and the sliding block by the first backflow half.

5. linear actuator as claimed in claim 1, it is characterised in that：Vertical axis is defined as radially, and this is second time The two second backflow portions for flowing half are less than the two inner caps in height radially in height radially, respectively should thereby make One second radial indent is formed between second backflow portion and the inner cap at two ends, the opening direction of second radial indent is with being somebody's turn to do The opening of second grooving is in opposite direction, and the two of the sliding block sidepiece opposite sides then axially open up an outer side slot respectively, should The outer side slot correspondence set of sliding block is overlying on the second radial indent of the second backflow half and sticked in the second backflow portion.

6. linear actuator as claimed in claim 1, it is characterised in that：Vertical axis be defined as radially, and this first Two first backflow portions for the half that flows back are less than the two outer end caps in height radially in height radially, make respectively this Form one first radial indent between one backflow portion and the outer end cap at two ends, the outside in the two first backflow portions more by this first Radial indent is recessed one resistance portion of shaping again, and the resistance portion is the slot structure of many scalariforms, and the two of sliding block sidepiece opposite sides An outer side slot is then axially opened up respectively, and then more radially shaping one is covered the top surface of the sliding block with the joining place of the outer side slot Location division, the covering location division correspondence set of the sliding block is overlying on the resistance portion of the first backflow half.

7. linear actuator as claimed in claim 1, it is characterised in that：The two of the first backflow half, first backflow Portion is relative and is located between the two ends of the two outer end caps, the relative side definition of the two outer end caps and the two first backflow portions For the inner side of inner side, and each first backflow portion, first backflash is set, and first backflash is axially extended by one The reflux section that linear displacement section two ends are respectively communicated with an arc is constituted.

8. linear actuator as claimed in claim 1, it is characterised in that：First backflash by one axially X prolong The reflux section that the linear displacement section two ends stretched are respectively communicated with an arc is constituted, each guiding positioning convex portion of the second backflow half Guiding face be half arc surface that the inner side cambered surface, one end cambered surface and an outside cambered surface being sequentially mutually connected are constituted, respectively this Two backflow portions be respectively along the profile of the outside cambered surface be configured to an arc chip architecture and axially development length to be linked to two Between the inner cap, and make two second refluxing portions not Ju You second backflash, second backflash is connected the outside Cambered surface, the inner side cambered surface that the inner cap connects the two guiding positioning convex portions opens up second grooving, and the second backflow half This place restrictions on face in face of the reflux section.

9. linear actuator as claimed in claim 1, it is characterised in that：First backflash is axially extended by one Linear displacement section two ends be respectively communicated with the reflux section of an arc and constituted, the guiding face is the inside arc that is sequentially mutually connected The half arc surface that face, one end cambered surface and an outside cambered surface are constituted, respectively the second backflow portion is wheel respectively along the outside cambered surface Exterior feature be configured to an arc chip architecture and axially development length to be linked between the two inner caps, and make two this second backflow Portion has second backflash respectively, and second backflash is connected the outside cambered surface and connects linear displacement section, and each outside Cambered surface is connected linear displacement section, and the end cambered surface is connected the reflux section, and the rolling groove of the sliding block is connected the guiding positioning convex portion Inner side cambered surface.

10. linear actuator as claimed in claim 1, it is characterised in that：Vertical axis be defined as radially, and this first Two first backflow portions for the half that flows back are less than the two outer end caps in height radially in height radially, make respectively this Formed and axially opened up again in one first radial indent, first radial indent between one backflow portion and the outer end cap at two ends One location indentations, and the inner cap of the second backflow half then axially shapes a positioning convex portion, the second backflow half The two inner caps abut against in this first backflow half the first radial indent, and this second backflow half positioning convex portion match somebody with somebody Close the location indentations for receiving into the first backflow half.