CN101634337B - Rolling element retaining chain unit - Google Patents

Abstract

The rolling element retaining chain unit of the present invention provides a rolling element retaining chain that allows the rolling elements in a row to run smoothly in a circulation channel, and maintains a fixed interval between two adjacent rolling elements so that they do not collide with each other. The rolling element retaining chain is composed of at least one flexible metal sheet and a plurality of spacer blocks, wherein the metal sheet has axially arranged holes, and a horizontal bar is formed between the holes to separate the two holes, and the spacer blocks are combined with the horizontal bar; since the strength of the flexible metal sheet is much higher than that of the plastic material generally used, it can withstand higher tensile forces without breaking, thus better ensuring the durability of the rolling element retaining chain; in addition, the thickness of the metal sheet is thin, and the two ends of the metal sheet can be overlapped and fixed without interference, thereby forming a closed rolling element retaining chain.

Description

Rolling element retaining chain unit

Technical field

The present invention is the rolling element retaining chain unit that is applied in the linear motion mechanism, one extends axially a plurality of rolling elements that the flexible rolling element of tool keeps chain will extend axially into row remains in wherein, and between two adjacent rolling elements, keep the certain intervals distance, then rolling element keeps chain and the rolling element can circular flow swimmingly in linear motion mechanism such as circulation channel that linear slide rail or ball screw etc. provided.

Background technique

There is the movement parts and can axially extended guide member in the existing linear motion mechanism; Movement parts respectively provides the corresponding mutually track of at least one row to form an operation channel with guide member; Movement parts also provides a return flow line and two slalom courses to the mutually corresponding track of each row, slalom course connects the end face gateway of return flow line and track, form a circulation channel, make rolling element to enter the return flow line via slalom course from track regions, again via slalom course injection district, so rolling element can circular flow in the circulation channel from the return flow line; By the unrestrictedly rolling of rolling element, movement parts is able to move along the unlimited stroke of track ground on guide member.

For avoiding rolling element to run foul of each other between any two, movement parts provides rolling element to keep the design of chain; There is the most spacer block of row between rolling element and by a connection strap, to be connected in series, therefore maintain a certain distance circular flow between the rolling element, and movement parts is able to move more smooth-goingly.Existing general design is directly to make with resin ejection formed as the disclosed ball chain of Japan Patent JP 05-052217 (Japanese unexaminedpatent publication).But when more and more little or more and more accurate, more be not easy ejection formation when linear motion mechanism, be easy to generate and penetrate full situation; Because the tensile strength of resin is little, can not guarantee in the middle of circular flow, can not rupture in addition, thereby usually can cause that operation has some setbacks because of rupturing suddenly.

For overcoming above-mentioned problem, as U.S. Pat 6,142, the design that 671 disclosed rolling elements keep chain, wherein maintainance block and connection strap are to be made by the flexual metal tape of a tool, because the tensile strength of metal is far above resin, the flexual metal tape of this tool can increase the pull resistance that rolling element keeps chain on the one hand, more difficult fracture can reduce the thickness of connection strap on the other hand but still keeps higher pull resistance.When metal tape thickness is not less than 0.1mm, can easily finish the manufacturing of the littler design of size in the mode of punching press bending.The Young's modulus of supposing metallic material is E, and thickness is the metal tape of h, does bending radius and be the circular arc of ρ when crooked, and the maximum stress that it produced is σ _R

${\mathrm{\σ}}_R=\frac{E\·h}{2\·\mathrm{\ρ}}$

Steel metal tape thickness h=0.03mm for example, E=210,000N/mm ², ρ=10mm, then σ _R=315N/mm ², because the Young's modulus of metallic material is far above resin, so the rolling element connection strap thickness that the thickness of metal tape will be made much smaller than resin material under same bending radius produces excessive stress and keeps its bending resistance avoiding.But when metal tape thickness during less than 0.06mm, the making of precise punch forming and bending is difficulty more and more, therefore is difficult at tinsel machine shaping wrapping plate, with as the maintainance block of rolling element and maintenance rolling element function in the rolling element connection strap at interval; Increase sheet thicknesses easily if make to make, with increasing the resistance of tinsel when crooked, cause rolling element connection strap two ends by slalom course the time, cause not exclusively crooked and revolution has some setbacks, and when circular flow, material is tired and rupture easily.

For overcoming above-mentioned problem, as U.S. Pat 7,329, the design of 047 disclosed rolling element connecting band is made by a metal tape that is wrinkle shape, utilizes the folding shape to increase flexible part, to share the amplitude of required bending, Figure 34 for example, Figure 35, shown in Figure 36, wherein metal tape has N fold in 90 ° of degree bending range, and bending radius is ρ, and the fold degree of depth is T, calculate for simplifying, suppose that fold is most advanced and sophisticated for cusp, can obtain fold width 2W, the fold length L, its geometrical relationship is as follows:

H＝V+T

$L=\sqrt{W^2+H^2}$

As shown in figure 36, S is represented as the metal tape of straight line when crooked, and S ' representative is ρ and the bend angle metal tape when being 90 ° in bending radius, the angle of S and S ' differs 90 °/4N degree, calculate for simplifying, suppose that the fold length L circular arc bending of radius such as does, radius of arc is r.Therefore when the thickness of metal tape was h, forming bending radius and be the maximum stress that the circular arc of r produced when crooked was σ _R

${\mathrm{\σ}}_R=\frac{E\·h}{2\·\mathrm{\ρ}}$

In the general design, the circulation channel provides the width of circulation guide groove to be about 0.1～0.2 times of rolling element diameter, and the fold degree of depth is less than the width of groove, and the turning radius is about 1.5～3.0 times of rolling element diameter.

For example: rolling element diameter phi D=5mm, steel tinsel Young's modulus E=210,000N/mm ², turning radius ρ=10mm then can calculate at the maximum stress that acts under the different situations on this metal tape that is wrinkle shape and is

T＝0.8mm，h＝0.0685mm，N＝20，2W＝0.8mm，σ _R＝315N/mm ²，

T＝1.0mm，h＝0.823mm，N＝20，2W＝0.8mm，σ _R＝314N/mm ²，

T＝0.8mm，h＝0.126mm，N＝60，2W＝0.4mm，σ _R＝315N/mm ²；

Can learn by aforementioned calculation, under identical stress, the fold number N the more or fold degree of depth T more can increase thickness; And according to general design size, as above shown in the example, can reach about two to four times of the metal tape that do not have fold approximately at the metal tape thickness of tool fold under the identical stress, and can solve the problem that does not have the fold metal tape.But this design will make the connection strap bi-side that extend axially that are made of metal tape become wrinkle shape rather than even surface, owing to move in the closed circulation guide groove that this metal tape that is wrinkle shape will be provided at the circulation channel of linear motion, keep chain direction correctly in the operation of circulation channel steady and smooth ground with the guiding rolling element.Each fold is approximately perpendicular to this guide groove, so the end points of each fold can be unfavorable for the smooth and easy operation in guide groove of this metal tape that is wrinkle shape.And therefore the closed circulation guide groove of circulation channel is worked as each fold end points and will be caused unsettled beating through the junction always by the parts combination more than two, and operation also therefore can't steady and smooth.

Summary of the invention

The object of the present invention is to provide the rolling element retaining chain unit of a tool flexible metal sheet, can solve above-mentioned use tinsel designing institute and produce difficult bending punching press, and the operation of avoiding producing because of fold has some setbacks, even can increase the tensile strength of rolling element connection strap as the fold design.

According to above-mentioned purpose, rolling element retaining chain unit of the present invention is made up of flexual tinsel of at least one tool and spacer block, wherein the flexual tinsel of at least one tool has axially-aligned plural number hole, and should the plural number hole, wantonly two holes are separated by a horizontal stripe, and the spacer block combination thereon; Hole respectively forms a connection strap in both sides up and down, and all horizontal stripes connect thereon; The one-tenth row rolling element of axially-aligned is held in the hole and is spaced apart piece is separated by in twos, maintain a certain distance between the rolling element, and rolling element keeps the connection strap of chain to move in the circulation channel provides the groove that extends along traffic direction, keeps chain direction correctly in the operation of circulation channel steady and smooth ground with the guiding rolling element.Rolling element keeps the chain operation that is in line approximately in track regions and return flow line, then comply with rotating bending curvature in the slalom course district, also do the action that alternating bending is stretched when therefore rolling element keeps bar circular flow, can not produce plastic deformation, the thickness h of sheet metal and h＜h for making its repeated stress _o, h _o=2R _P0.2ρ/E, wherein E: be the Young's modulus of sheet material, R _P0.2: be the yield strength of 0.2% plastic deformation of sheet material, ρ: be the slalom course guide groove least radius of gyration.When therefore turning round in the slalom course district, neither meeting produces plastic deformation, and can reach the ability of alternating bending.

Can not rupture for reaching the predetermined life-span or the number of occurrence, can select suitable several f, make the thickness h≤fh of sheet metal according to the characteristic of various metallic material because of material is tired _m, h _m=2R _mρ/E, wherein R _m: be the rupture strength of sheet material; When for example sheet material is steel part and the number of occurrence to require be more than 1,000,000 times the time, f=0.6～0.7.It is closed that the circulation channel provides the circulation guide groove that extends along traffic direction, normally by plural parts be combined into, the junction has the surface of discontinuity that produces because of not aligning, and the connection strap bi-side that form owing to sheet metal do not have fold to remain even surface; Therefore can not produce in circulation guide groove junction to hinder causes operation to have some setbacks.

For in conjunction with the horizontal stripe between spacer block and the tinsel hole, provide on the horizontal stripe can prevent along the axially movable protrusion of horizontal stripe, recessed or on horizontal stripe, make aperture, think the usefulness of spacer block embedding.

The face that spacer block corresponds to rolling element is coated, rolling element about be and be maintained at rolling element between two spacer blocks of coated and keep chain and can freely not drop.The flexual tinsel of this tool has on it axially-aligned hole and nothing to collude shape partly, can be with punching press under thinner thickness, and etching mode is made.

The material of spacer block can be resin, comprises oil-containing, glass fibre, carbon fiber ... wait the resin that mixes.

Tinsel can penetrate spacer block on tinsel by ejection formation with combining of interlaminar resin spacer block.Another kind of combination is to be two interval half blocks about parting plane is divided into spacer block with the tinsel, about the two half blocks grooves that relative locating stud and hole arranged and hold the tinsel horizontal stripe at interval, therefore about two at interval half blocks form a complete spacer block after being combined in the left and right side of tinsel horizontal stripe.Another kind of combination is to be two half blocks at interval before and after parting plane divides spacer block with the tinsel vertical surface, before and after the two half blocks grooves that relative locating stud and hole arranged and hold the tinsel horizontal stripe at interval, therefore before and after two sides before and after half blocks are combined in the horizontal stripe of tinsel at interval form a complete spacer block.The locating stud of two interval half blocks can protrude from two interval half blocks, and form the coating face of rolling element at the end face of locating stud, the end face of the rolling element so the pin that is positioned coats and the interval, and therefore the space between the locating stud becomes the space of lubricant grease storage, thereby can prolong lubrication effect.

When reducing thickness h when tinsel because of the crooking ability that needs and causing rolling element to keep chain tensile strength not enough, can overlapping tinsel more than two together, again thereon with the combination of interlaminar resin spacer block, then can increase the tensile strength that rolling element keeps chain, and the thickness h 1 of every tinsel, h2 ...＜h _o, h _o=2R _P0.2ρ/E, because each tinsel can be crooked separately, so the rolling element maintenance chain of being made up of the multi-disc tinsel still can be possessed the crooking ability that the rolling element of being made up of single tinsel keeps chain, but its tensile strength can increase by multiple along with the superimposed sheets number.

About utilization or front and back two are at interval during the half block combination, about or front and back two at interval the half blocks groove that holds tinsel can be slightly larger than the tinsel horizontal stripe, provide each sheet tinsel when bending institute must relatively move more space, it is identical that the resistance between when the so overlapping rolling element that many tinsels constituted keeps chain crooked and its maximum stress that is produced can be kept the rolling element maintenance chain that is constituted with single tinsel.

For increasing the intensity that rolling element keeps the chain spacer block, on at least one tinsel between the axially-aligned hole and be connected in horizontal stripe on the tinsel connection strap and be split into two halves up and down, the two halves horizontal stripe sees through spacer block and links together and form a rolling element and keep chain up and down.

Be to increase the rigidity that rolling element keeps chain tinsel horizontal stripe, each hole of axially-aligned is that to be slightly larger than with the tinsel be the sectional shape that parting plane dissects each rolling element on the tinsel.

Surface friction drag when in the circulation guide groove, moving for the tinsel that reduces the tool high coefficient of friction, at least the tinsel of a slice can tool than the resin-coating of low coefficient of friction and with the spacer block ejection formation.

Rolling element can be ball or roller.

Because the rolling element that sheet thicknesses is made much smaller than resin keeps chain, but the overlapped metal sheet that therefore has living space in design; In tinsel rolling element retaining chain unit of the present invention, the tinsel at its two end part overlaps each other, and provide at least one interval half block in each end at two end part, at least one interval half block of one end is corresponding mutually with at least one interval of the other end half block, and corresponding locating stud and positioning hole arranged, the fixing back that mutually combines forms complete spacer block, and the rolling element of sealing keeps chain, and therefore the tinsel rolling element retaining chain unit has solved the problem that both ends open causes operation to have some setbacks.

The another kind design of tinsel rolling element retaining chain unit of the present invention, be with at least one tinsel and be seated in and be combined into semimetal sheet rolling element every half block between the side of at least one tinsel and keep chain, half block has corresponding locating stud and positioning hole at interval, at least one tinsel can combine by injection molding method with the interval half block, combination via corresponding locating stud and positioning hole, two halves tinsel rolling element keeps chain to be bonded into a complete rolling element and keeps chain, semimetal sheet rolling element retaining chain unit with the spacer block of tool coated in two, difficulty that can't direct demold in the time of so can simplifying and solve the spacer block ejection formation of tool coated.

Description of drawings

Fig. 1 keeps the side view of chain for the flexual tinsel rolling element of the disclosed tool of the present invention;

Fig. 2 is the I-I sectional drawing of Fig. 1;

Fig. 3 is the II-II sectional drawing of Fig. 1;

Fig. 4 keeps the flexual tinsel part of the tool view of chain for rolling element that the present invention discloses;

Fig. 5 keeps the chain schematic representation that circulates for the flexual tinsel rolling element of the disclosed tool of the present invention in movement parts;

Fig. 6 keeps the side view of the tinsel horizontal stripe design of chain for the disclosed rolling element of the present invention;

Fig. 7 keeps the perspective view of second kind of design of chain spacer block for the disclosed rolling element of the present invention;

Fig. 8 is the A enlarged view of Fig. 7;

Fig. 9 keeps the third design side view of chain spacer block for the disclosed rolling element of the present invention;

Figure 10 is the B enlarged view of Fig. 9;

Figure 11 keeps the perspective view of the third design space before half block of chain spacer block for the disclosed rolling element of the present invention;

Figure 12 keeps the top view of the third design space before half block of chain spacer block for the disclosed rolling element of the present invention;

Figure 13 is the III-III sectional drawing of Figure 12;

Figure 14 keeps the top view of chain multi-disc tinsel design for the disclosed rolling element of the present invention;

Figure 15 is the C enlarged view of Figure 14;

Figure 16 keeps the schematic representation of chain multi-disc tinsel design for the disclosed rolling element of the present invention;

Figure 17 is for the disclosed rolling element of the present invention keeps the design of chain multi-disc tinsel down, has than wide groove and is incorporated into the side view of a left side half spacer block on the multi-disc tinsel;

Figure 18 is for the disclosed rolling element of the present invention keeps the design of chain multi-disc tinsel down, has than wide groove and is incorporated into the schematic representation of the front and back spacer block on the multi-disc tinsel;

Figure 19 keeps the chain top view of the another kind of design of a slice tinsel at least for the disclosed rolling element of the present invention;

Figure 20 has the side view of resin-coating design for the disclosed rolling element of the present invention keeps the chain connection strap;

Figure 21 is the VI-VI sectional drawing of Figure 20;

Figure 22 is the V-V sectional drawing of Figure 20;

Figure 23 is the perspective view of the maintenance chain design of roller for the disclosed rolling element of the present invention;

Figure 24 is the top view of the maintenance chain design of roller for the disclosed rolling element of the present invention;

Figure 25 is the VII-VII sectional drawing of Figure 24;

Figure 26 connects the side view of design for the disclosed multi-disc tinsel of the present invention keeps link ends;

Figure 27 connects the top view of design for the disclosed multi-disc tinsel of the present invention keeps link ends;

Figure 28 interconnects the top view of design for the disclosed multi-disc tinsel of the present invention keeps link ends;

Figure 29 interconnects the schematic representation of design for the disclosed multi-disc tinsel of the present invention keeps link ends;

Figure 30 keeps the side view of chain design for the disclosed semimetal sheet of the present invention;

Figure 31 is the VIII-VIII sectional drawing of Figure 30 and the sectional drawing that corresponding second half tinsel keeps chain;

Figure 32 keeps the chain design in correspondence with each other in conjunction with schematic representation for the disclosed two halves tinsel of the present invention;

Figure 33 is the D enlarged view of Figure 32;

Figure 34 is fold metal tape schematic representation when the revolution channel is crooked;

Figure 35 is the geometrical relationship figure of fold metal tape each fold when bending;

Figure 36 is the geometrical relationship figure of fold metal tape when straight line and bending.

[figure number explanation]

Rolling element keeps chain 01 tinsel 02, spacer block 03, rolling element row 05, movement parts 06, roller 07, roller separation piece 08, end part interval half block 09,10, semimetal sheet rolling element keeps chain 11, axially-aligned hole 21, horizontal stripe 22, connection strap 23, horizontal stripe protrudes 24, horizontal stripe is recessed 25, horizontal stripe aperture 26, about two half blocks 31 at interval, 32, about two locating studs 33 of half blocks at interval, about two holes 34 of half blocks at interval, about two at interval half blocks hold tinsel groove 35, front and back two are half blocks 41 at interval, 42, front and back two are the locating stud 43 of half block at interval, and front and back two are the hole 44 of half block at interval, front and back two half blocks at interval hold tinsel groove 45, front and back two are the locating stud end face 46 of half blocks at interval, circulation channel 61, circulation channel guide groove 62, track regions 64, return flow line 63, slalom course district 65, multi-disc tinsel connection strap 200, multi-disc tinsel 201,202,203..., the horizontal stripe 210 of multi-disc tinsel, at least one tinsel 220, at least one tinsel 230, the two halves horizontal stripe 221,222 up and down, at least one tinsel connection strap 223,224, the corresponding hole 231 of tinsel, resin-coating layer 301, about two half blocks 320 at interval, interval half block 340, positioning hole 341, locating stud 342, be slightly larger than the groove 350 of multi-disc tinsel, 450, front and back two are half block 410,420 at interval.

Embodiment

As Fig. 1, shown in Figure 2, a rolling element keeps chain 01 design to be made up of flexual tinsel 02 of a tool and plural spacer block 03, and wherein the flexual tinsel 02 of this tool has axially-aligned hole 21.As shown in Figure 4, form a horizontal stripe 22 between the hole 21 and separate two holes 21, spacer block 03 is incorporated on this horizontal stripe 22; Hole respectively forms a connection strap 23 in both sides about in the of 21, and all horizontal stripes 22 are connected on this connection strap 23; One rolling element row comprise plural rolling element 05, and each rolling element 05 is held in each hole 21 and is spaced apart piece 03 is separated by in twos; As shown in Figure 3, the face that spacer block 03 corresponds to rolling element 05 is coated 36, rolling element 05 about be and be maintained at rolling element between two spacer blocks 03 of coated 36 and keep chain 01 and can freely not drop.As shown in Figure 5, rolling element keeps chain 01 and rolling element row 05 to be positioned at circulation channel 61 circular flows that movement parts 06 is provided; Circulation channel 61 provides the groove 62 that extends along traffic direction, and rolling element keeps the connection strap 23 of chain 01 to be positioned at groove 62 being guided.Rolling element keeps chain 01 operation that is in line approximately in track regions 64 and return flow line 63, then comply with minimum rotating radian ρ bending in slalom course district 65, also do the motion that alternating bending is stretched when therefore rolling element keeps chain 01 circular flow, for making its repeated stress can not produce plastic deformation, the thickness h of tinsel 02, as shown in Figure 2, and h＜h _o, h _o=2R _P0.2ρ/E, wherein E: be the Young's modulus of sheet material, R _0.2p: be the yield strength of sheet material 0.2% plastic deformation, ρ: be the slalom course least radius of gyration.Therefore rolling element keeps chain 01 can not produce plastic deformation in the slalom course district during 65 revolutions, and can reach the ability of alternating bending.

Can not rupture for reaching the predetermined life-span or the number of occurrence, can select suitable coefficient f, make the thickness h≤fh of tinsel 02 according to various properties of materials because of material is tired _m, h _m=2R _mρ/E, wherein R _m: be the rupture strength of sheet material; When for example tinsel 02 material is steel part and the number of occurrence require greater than more than 1,000,000 times the time f=0.6～0.7.Because tinsel 02 elongated shape connection strap 23 bi-side do not have fold, so remain even surface.

As shown in Figure 6, horizontal stripe 22 design can with spacer block 03 secure bond, provide can prevent spacer block 03 recessed 25 or on horizontal stripe 22, make aperture 26 on the horizontal stripe 22 along horizontal stripe 22 axially movable protrusions 24; Protrude 24, recessed 25 or aperture 26 preferably reducing the thickness in the middle of the horizontal stripe 22, and can reduce the distance of 05 of two rolling element at horizontal stripe 22 two ends in the position.

Tinsel 02 can punching press, and etching or laser cutting mode are made; As shown in Figure 1, tinsel 02 can penetrate spacer block on tinsel 02 by ejection formation with combining of spacer block.As Fig. 7, shown in Figure 8, second kind of combination is to be parting plane with spacer block two half blocks 31,32 at interval about 03 minute with tinsel 02, about two half blocks 31,32 grooves 35 that relative locating stud 33 and hole 34 arranged and hold horizontal stripe 22 on the tinsel at interval.Therefore see through relative locating stud 33 and hole 34 can with about two at interval half blocks 31,32 be combined on the horizontal stripe 22 of tinsel and form a complete spacer block 03.As Fig. 9, shown in Figure 10, the third combination is that the vertical surface with tinsel 02 is a parting plane with two half blocks 41,42 at interval before and after the spacer block 03 minute.As Figure 11, Figure 12, shown in Figure 13, the groove 45 that front and back two interval half blocks 41,42 have relative locating stud 43 and hole 44 and hold tinsel 02.Therefore see through relative locating stud 43 and hole 44 can with front and back two at interval half blocks 41,42 be combined on the horizontal stripe 22 of tinsel and form a complete spacer block; As shown in figure 10, two interval half blocks 41 before and after locating stud 43 can protrude from, 42, and form the coating face of rolling elements 05 at the end face 46 of locating stud 43, therefore rolling element is coated and the interval by the end face 46 of the locating stud of two adjacent spacer blocks, therefore space between the locating stud 43 becomes the space of lubricant grease storage, thereby can keep the direct lubrication effect to rolling element 05.

As shown in figure 15, the flexual tinsel 200 of at least one tool is by multi-disc tinsel 201,202,203... overlapping composition, more thereon with 03 combination of interlaminar resin spacer block, to increase the tensile strength that rolling element keeps chain 01, and the every thickness h 1 of multi-disc tinsel 200, h2, h3...＜h _o, h wherein _oState as defined above.As shown in figure 16, because each tinsel 201,202,203... can be crooked separately, so the rolling element connection strap of being made up of multi-disc tinsel 200 still can be possessed the crooking ability of the rolling element connection strap of being made up of single tinsel 02, increases but its tensile strength can be multiple with the quantity of overlapped metal sheet.

As Fig. 8, about combination shown in Figure 10 or front and back two are half block 31,32 or 41 at interval, 42 combination, as Figure 17, shown in Figure 180, about or front and back two half blocks at interval, the groove that holds multi-disc tinsel 200 350,450 on 320 and 410,420 can be slightly larger than the horizontal stripe 220 of multi-disc tinsel, so that each sheet tinsel 201 to be provided, 202,203 ... when bending institute must relatively move more space.

As shown in figure 19, for increasing the intensity of spacer block 03, at least the horizontal stripe 220 between the axially-aligned hole 21 is split into two halves horizontal stripe 221 up and down on a slice tinsel 200,222 and be connected connection strap 223 separately, on 224, the end points of spacer block 03 upper and lower end and two halves horizontal stripe 221,222 up and down links to form a complete rolling element and keeps chain.

As Figure 20, Figure 21, shown in Figure 22, for being reduced by at least the tinsel connection strap 23 of a slice, 204,223 in circulation guide groove 62 surface friction drag in when operation, the tinsel connection strap 23 of a slice at least, tool is arranged than the resin-coating layer 301 of low coefficient of friction and with spacer block 03 ejection formation outside 204,223.

As Figure 23, Figure 24, shown in Figure 25, rolling element can be roller 07, is combined on the horizontal stripe 22 and can separates roller 07 and reach roller and can not collide and remain in rolling element mutually and keep can freely not dropping in the chain 01 with respect to the roller separation piece 08 that adjacent roller 07 has a coating face 81.

As Figure 26, shown in Figure 27, two interval half blocks 09 that provide in an end of the flexual tinsel 02 of tool, two interval half blocks 10 that provide with the other end are corresponding mutually, on the corresponding intervals half block 09,10 corresponding locating stud and positioning hole arranged mutually.As Figure 28, shown in Figure 29, at interval half block 09, the 10 fixing back that mutually combines forms two complete spacer blocks, so there have the two end part 27,28 of hole 21 to overlap each other on its of tinsel 02 to be fixing, thereby the rolling element that forms sealing keeps chain 01.The length at overlapping two end part 27,28 can increase and decrease along with the number of corresponding interval half block 09,10.

As Figure 30, Figure 31, Figure 32, shown in Figure 33, it is at least one tinsel 230 to be combined into semimetal sheet rolling element with interval half block 340 keep chain 11 that tinsel rolling element of the present invention keeps the another kind design of chain 01, at interval half block 340 has corresponding locating stud 342 and positioning hole 341, because locating stud 342 diameters are greater than at least one tinsel 11 corresponding holes 231 diameters, therefore at least one tinsel 230 can combine by injection molding method with interval half block 340.Via the combination of corresponding locating stud 342 and positioning hole 341, two halves tinsel rolling element keeps chain 11 to be combined into a complete rolling element and keeps chain 01, and two halves tinsel 230 also can be closely linked.

Claims (15)

1. A rolling element retaining chain unit, including at least one flexible metal sheet and a plurality of spacers, and the metal sheet is provided with a plurality of holes arranged in the axial direction, and in the plurality of holes, any two holes are connected by a horizontal bar To be separated, the spacer block is combined on the horizontal bar, so that each rolling body of the whole row of rolling bodies is kept in each hole, and keeps a fixed distance from each other in the circulating channel without colliding with each other. The flexible Thickness h of the metal sheet

E is the modulus of elasticity of the metal, ρ is the minimum bending radius of the rolling element to keep the chain running in the cyclic channel, R _p0.2 is the yield strength of the metal with 0.2% plastic deformation. 2. The rolling element retaining chain unit according to claim 1, wherein the horizontal bar of the hole has a protrusion, a recess or a small hole that prevents the spacer from sliding. 3. The rolling element retaining chain unit as claimed in claim 1, wherein the spacer is made of resin material. 4. The rolling element retaining chain unit according to claim 3, wherein the spacer is directly injection-molded on the metal sheet. 5. The rolling element retaining chain unit as claimed in claim 1, wherein the spacer block is composed of two left and right spacer halves passing through corresponding positioning pins and holes and combined on the horizontal bar of the metal sheet, and the left and right spacer halves The blocks have grooves that accommodate the bars of the sheet metal. 6. The rolling element retaining chain unit as claimed in claim 1, wherein the spacer block is composed of two spacer half blocks at the front and rear through the corresponding positioning pins and holes and combined on the horizontal bar of the metal sheet, and the spacer at the front and rear There are grooves on the halves to accommodate the bars of the sheet metal. 7. The rolling element retaining chain unit as claimed in claim 6, wherein the positioning pins of the front and rear two spaced half blocks protrude from the two spaced half blocks, and form the wrapping surface of the rolling body on the end faces of the positioning pins. 8. The rolling element retaining chain unit as claimed in claim 1, wherein the holes of the metal sheet are manufactured by stamping, etching or laser cutting. 9. The rolling element retaining chain unit as claimed in claim 1, wherein the metal sheets are overlapped to form each sheet metal thickness h1, h2, h3, and so on;

E is the modulus of elasticity of the metal, ρ is the minimum bending radius of the rolling element to keep the chain running in the cyclic channel, R _p0.2 is the yield strength of the metal with 0.2% plastic deformation. 10. The rolling element retaining chain unit according to claim 5 or 6, wherein the groove for accommodating the metal piece is slightly larger than the horizontal bar of the metal piece. 11. The rolling element retaining chain unit as claimed in claim 1, wherein the horizontal bar of the metal sheet is divided into upper and lower half horizontal bars and the upper and lower half horizontal bars are connected by a spacer. 12. The rolling element holding chain unit according to claim 3, wherein the metal piece is covered by a resin coating layer injection-molded together with the spacer. 13. The rolling element retaining chain unit according to claim 1, providing a whole row of rolling elements running in the circulation channel, wherein the rolling elements are balls or rollers. 14. The rolling element retaining chain unit as claimed in claim 1, wherein the rolling element retaining chain provides at least one spacer half at each of the two ends, fixed into a complete body via the combination of at least one pair of two spacer halves Spacer blocks, and the two ends of the metal sheet are connected and fixed together in an overlapping manner to form a closed rolling element retaining chain. 15. The rolling element retaining chain unit as claimed in claim 1, wherein the rolling element retaining chain unit is formed by joining the left and right halves of the metal sheet rolling element retaining chain, wherein the half metal sheet rolling element retaining chain is composed of at least one metal sheet and A plurality of spacer halves on the same side are combined by injection molding. There are corresponding positioning pins and positioning holes on the spacer half blocks. The spacer half blocks of the holding chain are combined into a complete spacer block, and the left and right halves of the metal sheet rolling elements are kept linked to form a complete rolling element holding chain unit. the

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