JP2009299890A - Rolling body retaining chain unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling body retaining chain which is operated smoothly in accordance with a circulation route. <P>SOLUTION: The rolling body retaining chain 01 consists of a flexible metal thin piece 02 and a plurality of resin spacers 03, which a metal piece has an arrangement hole in an axial direction and forms a horizontal part between holes and fixes a horizontal part of the spacer. The rolling bodies 05 such as balls etc. are retained into an arrangement hole and mutually held by the spacer at a fixed interval. The strength of the flexible metal thin piece is higher than a general currently used plastic material and is not torn even if it receives higher tension, and it guarantees more the durability of the rolling body retaining chain. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a rolling element holding chain unit such as a ball chain applied to a linear motion mechanism, and a rolling element holding chain having elasticity extending in the axial direction extends in the axial direction to form a plurality of rolling elements in a row. In a circulation path formed by a linear motion mechanism, for example, a linear sliding track or a pearl screw, which is accommodated in a holding hole and held at a constant distance between two adjacent rolling elements, It is related with the rolling element holding | maintenance chain unit which can carry out circulation operation smoothly.

Current linear motion functions include a motion member and an axially extendable guide member. The motion member and the guide member each provide at least one row of mutually corresponding tracks to form an operating route. The moving member provides a circulation path and two turning paths for each row of mutually corresponding tracks, and the turning path is connected to the turning path and the end face entrance of the track to form a circulation path. It is possible to enter the circulation path from the track area via the turning path, and further enter the track area via the turning path from the rotation path, so that the rolling elements can circulate in the circulation path. By the unlimited rolling of the rolling elements, the motion member can move on the guide member along the track without limiting the stroke.

  In order to prevent the rolling elements from colliding with each other, the moving member forms a structure of a rolling element holding chain. A plurality of spacers arranged in a row are arranged between the rolling elements, and are connected in series so as to circulate while maintaining a certain distance between the rolling elements, and the moving member can operate more smoothly. A current general design, for example, a roller ball chain disclosed in JP05-052217 (Japanese unexamined patent publication) is directly formed by resin injection molding. However, as the linear motion mechanism becomes smaller or more precise, injection molding becomes more difficult, and a situation in which injection molding cannot be filled with resin easily occurs. In addition, since the tensile strength strength of the resin is small, it is not possible to guarantee that the resin does not break during the circulation operation.

と仮定する。 In order to overcome the above problems, for example, in the structure of a rolling element holding chain disclosed in US Pat. No. 6,142,671, the holding block and the connecting portion are formed of a flexible metal band, and the tensile strength of the metal is higher than that of the resin. Since it is much higher, on the one hand, the flexible metal band can strengthen the tensile strength of the rolling element holding chain, so it is difficult to tear, and on the other hand, it retains higher tensile strength while reducing the thickness of the connection be able to. When the thickness of the metal strip is not smaller than 0.1 mm, a structure having a smaller dimension can be easily realized by the press bending method. When a metal band having a modulus of elasticity E and a thickness h of a metal material forms an arc with a radius of curvature ρ, the maximum stress generated is about σ _R.

Assume that

For example, if the thickness of the steel metal strip is h = 0.03 mm, E = 210,000 N / mm ² , and ρ = 10 mm, σ _R = 315 N / mm ² , and the elastic modulus of the metal material is much higher than that of the resin Therefore, if the radius of curvature is the same, the thickness of the metal strip is much smaller than the thickness of the rolling element joint made of a resin material, so that excessive bending of stress can be avoided. Can be held. However, when the thickness of the metal strip is smaller than 0.06mm, it becomes more difficult to produce precision press molding and bending, and the coated piece is processed and molded in the metal piece, and the rolling element is connected to the rolling element. It is difficult to make a holding block that holds the utility in the department. Facilitates manufacture, increases the thickness of the metal piece, increases the resistance force when the metal piece is bent, and when the rolling elements are connected to both ends and pass through the turning path, the bending is incomplete and the rotation is smooth It breaks without being able to follow easily during circulation operation.

In order to overcome the above problems, for example, the design of the rolling element connecting band disclosed in US Pat. No. 7,329,047 is formed from a metal band having a hook shape, and uses the hook shape to increase the bendable portion, Share the necessary width, for example, as shown in FIGS. 34, 35 and 36, the metal band of which has N ridges within a 90 degree curvature range, and the radius of curvature is ρ, Assuming that the depth of the heel is T and the tip of the heel is the intersection of the tips to simplify the calculation, the width 2W of the heel and the length L of the heel can be obtained. As follows:

As shown in FIG. 36, S indicates a metal band when the straight line is not curved, S ′ indicates a metal band when the radius of curvature is ρ and the bending angle is 90 degrees, and S and S The angle difference of 'is 90 / 4N degrees, and in order to simplify the calculation, it is assumed that the length L of the ridge has an arc curvature with the same radius, and the arc radius is r. Therefore, when the thickness of the metal band is h, the maximum stress generated when forming an arc curve having a radius of curvature r is σ _R.

In a general design, the width of the circulation guide groove provided by the circulation path is 0.1 to 0.2 times the rolling element diameter, the depth of the ridge is smaller than the width of the groove, and the turning radius is equal to the diameter of the rolling element. 1.5 to 3.0 times.

For example, if the diameter of the rolling element is φD = 5 mm, the elastic modulus of the steel metal piece is E = 210,000 N / mm ² , and the turning radius ρ = 10 mm, it exhibits the saddle shape under different circumstances The maximum stress acting on the metal strip is
T = 0.8mm, h = 0.0685mm, N = 20, 2W = 0.8mm, σ _R = 315 N / mm ² ,
T = 1.0mm, h = 0.823mm, N = 20, 2W = 0.8mm, σ _R = 314 N / mm ² ,
T = 0.8mm, h = 0.126mm, N = 60, 2W = 0.4mm, σ _R = 315N / mm ²
And can be calculated.

As can be seen from the above calculation, the thickness can be increased as the number N of ridges increases or the depth T of the ridges increases under the same stress. According to the dimensions of general design, as shown in the above example, under the same stress, the thickness of the metal band with ridge can be 2-4 times that of the metal band without ridge, It can solve the problem of metal bands that do not have. However, in this structure, both side surfaces of the connecting portion extending in the axial direction composed of a metal band are not a smooth surface having a hook shape, and the hook-shaped metal band provides a circulation path of the linear motion mechanism. By operating in the closed circulation guide groove, the direction of the rolling element holding chain is accurate, and the operation is guided stably and smoothly in the circulation path. Since each ridge is perpendicular to the guide groove, it is disadvantageous that the metal strip having the ridge shape at the end of each ridge smoothly operates in the guide groove. In addition, since the circulation guide closed groove of the circulation path closing type is formed by coupling two or more members, the coupling portion of the end points of each ridge is unstablely swung, and stable and smooth operation cannot be performed.
JP 05-052217 A

The object of the present invention is to solve the difficulty of the curved press accompanying the structure using the above-mentioned metal piece, to avoid the irregularities of operation in which dredging occurs, and to increase the rolling element connection part tensile strength as in the dredging design method. It is to provide a rolling element holding chain unit having flexible metal pieces that can be increased.

Based on the above object, the rolling element holding chain unit of the present invention is composed of at least one flexible metal piece and a spacer, of which a plurality of flexible metal pieces are arranged in the axial direction. The plurality of holes are defined by a horizontal bar in which any two holes are spaced from each other, and a spacer is coupled thereon. Connection portions are formed on both upper and lower sides of the hole, and all the horizontal bars are connected thereto. The rolling elements arranged in a row in an axial direction are held in the holes, separated from each other by spacers, maintaining a certain distance between the rolling elements, and the connecting part of the rolling element holding chain is connected in the circulation path. It provides operation in a groove extending along the direction of operation, and the direction of the rolling element holding chain is stable and guides smooth operation in an accurate circulation path. The rolling element holding chain operates in a straight line in the raceway region and the circulation path, and in the turning path region, the rolling element holding chain bends according to the degree of arc to rotate. 1. In this case, the thickness of the metal flake h and h <ho, ho = 2. R _p0.2 . ρ / E, where E is the elastic modulus of the metal material, R _{p0.2 is} the yield strength of 0.2% plastic deformation of the metal material, and ρ is the minimum turning radius of the turning guide groove. Therefore, when turning on a turning path, plastic deformation does not occur, and the ability of repeated bending can be achieved.

An appropriate coefficient f is selected based on the characteristics of various metal materials and the thickness of the metal flakes is h ≦ f. h _m , h _m = 2. R _m . ρ / E, where R _m is the breaking strength of the metal material. For example, when the metal material is a steel product and the requirement for the number of repetitions is 1 million times or more, f = 0.6 to 0.7. Circulation guide groove that provides extension along the direction of operation of the circulation path is closed, and usually has two or more members joined together, and has a discontinuous surface caused by misalignment at the joint location The smooth surface can be held by the absence of wrinkles on both side surfaces of the connecting portion formed by the metal flakes. Therefore, a trouble is not generated at the circulation guide groove connecting portion, and the operation is not irregular.

To connect the horizontal bar between the spacer and the metal hole, provide a protrusion or recess on the horizontal bar that can prevent axial movement along the horizontal bar, or form a small hole on the horizontal bar Then, fit and fix the spacer.

  The surface of the spacer corresponding to the rolling element has a covering shape, and the space between the two spacers having the left and right covering shapes of the rolling element is held in the rolling element holding chain and does not fall freely. The metal piece having flexibility has holes arranged in the axial direction, does not have a hook portion, and can be manufactured by a press and etching method with a thinner thickness.

  The material of the spacer is a resin, and is composed of a resin made of a mixture of oil, glass fiber, carbon fiber and the like.

  The metal piece and the resin spacer can be joined by injecting the spacer onto the metal piece by injection molding. Another type of coupling method has a metal piece as a split surface, the spacer is divided into two on the left and right, and the left and right half spacers have corresponding positioning pins, holes, and concave grooves that accommodate the horizontal bars of the metal pieces. The two half spacers form a complete spacer after joining to the left and right sides of the metal bar horizontal bar. The other type of coupling method is that the vertical surface of the metal piece is a split surface, the spacer is divided into two front and rear, and the two front and rear half spacers have concave grooves that house the opposing localization pins and holes and the horizontal bar of the metal piece. Therefore, the two front and rear half spacers are bonded to the front and rear sides of the horizontal bar of the metal piece to form a complete spacer. The positioning pins of the two half spacers can project into the two half spacers and form a covered surface of the rolling element on the end face of the positioning pin, which is spaced from the covering of the end face of the positioning pin. As a result, the space between the stereotaxic pins becomes a space for accumulating lubricating oil and fat, and the lubricating effect can be improved.

であり、各金属片が単独で湾曲でき、このように複数の金属片から構成される転動体保持チェーンが依然として単一金属片から構成される転動体保持チェーンの湾曲能力を保有することができ、但し抗張力強度は、重ね合わせ片数に従い倍増することができる。 When the thickness h is reduced due to the bending ability required by the metal piece, and the tensile strength of the rolling element holding chain is insufficient, two or more metal pieces can be superposed on each other, and the resin spacer On top of that, the tensile strength of the rolling element holding chain can be increased, and the thickness of each metal piece is h ₁ , h ₂ ,… <ho,

Each metal piece can be bent independently, and thus the rolling element holding chain composed of a plurality of metal pieces can still retain the bending ability of the rolling element holding chain composed of a single metal piece. However, the tensile strength can be doubled according to the number of overlapping pieces.

  When using the left / right or front / rear two half-spacer coupling method, the concave groove that accommodates the metal pieces of the left / right or front / rear two half-spacers is slightly larger than the horizontal bar of the metal piece. The relative movement required during bending provides more space, and the resistance force and the maximum stress that can be generated when the rolling element holding chain composed of a plurality of stacked metal pieces bends is as follows: The same stress as that of the constituting rolling element holding chain can be maintained.

In order to increase the strength of the spacer of the rolling element holding chain, the horizontal bar connected to the metal piece connection portion between the array holes in the axial direction on at least one metal piece is divided into upper and lower halves, and the upper and lower half horizontal bars They are connected together via a spacer to form a rolling element holding chain.

  In order to increase the rigidity of the horizontal bar of the metal piece of the rolling element holding chain, the arrangement hole in the axial direction on the metal piece is slightly larger than the cross-sectional shape that cuts each rolling element with the metal piece as a dividing surface.

  In order to reduce the frictional resistance during operation in the circulation guide concave groove of a metal piece having a high friction coefficient, at least one metal piece has a resin coating having a low friction coefficient and is injection molded together with a spacer. be able to.

The rolling element can be a roller ball or a roller.

  Since the thickness of the metal piece is smaller than that of the rolling element holding chain formed of resin, there is a space on the structure and the metal pieces can be overlapped. In the metal piece rolling element holding chain unit of the present invention, the metal pieces at both ends thereof are overlapped with each other to provide at least one half spacer at both ends, and at least one half spacer at one end and at least one at the other end. The two half-spacers correspond to each other, have the corresponding positioning pins and positioning holes, and are bonded and fixed to each other, and then form a complete spacer and a sealed rolling element holding chain. The unit thus solves the problem of misoperation caused by opening both ends.

  Another structure of the metal piece rolling element holding chain unit of the present invention is to combine at least one metal piece with a half spacer placed on one side of at least one metal piece to form a half metal piece rolling element holding chain, The semi-spacer has a corresponding stereotactic pin and stereotactic hole, and at least one metal piece and the semi-spacer can be joined by injection molding, and two semi-metal piece rolling elements through a joint between the stereotyping pin and the stereotactic hole corresponding to each other The holding chain is connected to the complete rolling element holding chain, and the semi-metal piece rolling element holding chain unit divides the covering spacer into two parts, thus simplifying it and making the covering spacer directly into the injection molding Solves the difficulty of die cutting.

The rolling element 5 is held in the rolling element holding-chain 1 between two spacers 3 each having a covering shape 36 on the left and right sides, and does not fall freely. As shown in FIG. 5, the rolling element holding chain 1 and the rolling element row 5 are arranged in a circulation circuit 61 provided by the motion member 6 and circulate. The circulation path 61 provides a concave groove 62 extending along the operation, and the connecting portion 23 of the rolling element holding chain 1 is disposed and guided in the concave groove 62. The rolling element holding chain 1 is linearly operated in the raceway region 64 and the circulation path 63, and the turning region 65 bends according to the minimum arc ρ of rotation, so that when the rolling element holding chain 1 is circulated, the straightening of the rolling element is performed. The thickness of the metal piece 2 is h (see FIG. 2), and h <ho, ho = 2. R _0.2p . ρ / E, where E is the elastic modulus of the metal material, R _{0.2p is} the yield strength of 0.2% plastic deformation of the metal material, and ρ is the minimum turning radius of the turning path. Therefore, the rolling element holding chain 1 can achieve the ability to repeat the bending without causing plastic deformation when rotating in the turning path region 65.

In order to achieve a predetermined life or number of repetitions and prevent fracture due to material fatigue, an appropriate coefficient f is selected based on the characteristics of various materials, and the thickness of the metal piece 2 is set to h ≦ f. h _m , h _m = 2. R _m . ρ / E, where R _m is the breaking strength of the metal material. For example, when the material of the metal piece 2 is a steel product and the requirement for the number of repetitions is 1 million times or more, f = 0.6 to 0.7. Since both side surfaces of the elongated connecting portion 23 of the metal piece 2 do not have wrinkles, they hold a smooth surface.

As shown in FIG. 6, the horizontal portion 22 is configured to be fixedly coupled to the spacer 3, and a protrusion 24 and a recess 25 that prevent the spacer 3 from moving in the axial direction along the horizontal portion 22 on the horizontal portion 22. Or a small hole 26 is formed on the horizontal portion 22. The protrusions 24, the recesses 25 or the small holes 26 are optimally arranged at both ends of the horizontal portion 22, reducing the thickness in the middle of the horizontal portion 22 and reducing the distance between the two rolling elements 5. Can do.

The metal piece 2 can be manufactured by pressing, etching, or laser cutting. As shown in FIG. 1, the metal piece 2 and the spacer can be joined by injecting the spacer onto the metal piece 2 by injection molding. As shown in FIG. 7 and FIG. 8, the second coupling method is such that the metal piece 2 is a dividing surface, the spacer 3 is divided into two left and right half spacers 31, 32, and the two left and right half spacers 31, 32 are opposed to each other. A pin 33 and a hole 34 and a concave groove 35 for receiving the horizontal portion 22 on the metal piece are provided. Therefore, the left and right half spacers 31 and 32 can be coupled to the horizontal portion 22 of the metal piece via the opposing positioning pin 33 and the hole 34 to form a complete spacer 3. As shown in FIGS. 9 and 10, in the third coupling method, the vertical surface of the metal piece 2 is a divided surface, and the spacer 3 is divided into two front and rear half spacers 41 and 42. As shown in FIG. 11, FIG. 12, and FIG. 13, the front and rear half spacers 41, 42 have a facing pin 43, a hole 44, and a concave groove 45 that accommodates the metal piece 2. Accordingly, the front and rear half spacers 41 and 42 can be coupled to the horizontal portion 22 of the metal piece through the opposing positioning pins 43 and the holes 44 to form a complete spacer. As shown in FIG. 10, the localization pin 43 protrudes from the two front and rear half spacers 41, 42, and a covering surface of the rolling element 5 can be formed on the end face 46 of the localization pin 43, whereby the rolling elements are mutually connected. The space between the positioning pins 43 is covered with the end face 46 of the positioning pin of the spacer adjacent to the space, and the space between the positioning pins 43 becomes a space for accumulating lubricating oil, and the direct lubricating effect of the rolling elements 5 can be maintained.

As shown in FIG. 15, the metal piece 200 having at least one flexibility is formed by superposing a plurality of metal pieces 201, 202, 203... The tensile strength of the chain 1 is increased, and the thickness of each piece of the plurality of metal pieces 200 is h ₁ , h ₂ , h ₃ ... <Ho, of which the definition is the same as described above. As shown in FIG. 16, each metal piece 201, 202, 203... Can be bent alone, and thus the rolling element connecting portion formed by the plurality of metal pieces 200 is still a single piece. The bending ability of the rolling element connecting portion formed by the metal piece 2 can be maintained, and the tensile strength can be doubled according to the number of metal pieces stacked.

As shown in FIGS. 17 and 18, two left and right or front and rear half spacers 320 and 410, as shown in FIGS. The concave grooves 350 and 450 for accommodating the plurality of metal pieces 200 on the 420 are slightly larger than the horizontal portions 220 of the plurality of metal pieces, so that the metal pieces 201, 202, 203,. It can provide more space than you need.

  As shown in FIG. 19, in order to increase the strength of the spacer 3, the horizontal portion 220 between the array holes 21 in the axial direction on at least one metal piece 200 is divided into two upper and lower semi-horizontal portions 221 and 222. The upper and lower ends of the spacer 3 are divided into two upper and lower semi-horizontal portions 221 and 222, and the upper and lower ends of the spacer 3 are connected to the upper and lower ends of the spacer 3 respectively. Connected to the short points of the two semi-horizontal parts 221, 222 to form a complete rolling element holding chain.

  As shown in FIGS. 20, 21, and 22, at least one metal piece connection portion 23, 204, 223 reduces frictional resistance during operation in the circulation guide concave groove 62, so that at least one metal piece connection is made. A resin coating layer 301 having a low friction coefficient is provided outside the portions 23, 204, and 223, and is integrally injection-molded together with the spacer 3.

  As shown in FIGS. 23, 24, and 25, the rolling element can be a roller 7. The roller spacer 8 coupled to the horizontal portion 22 and corresponding to the covering surface 81 of the rollers 7 adjacent to each other separates the rollers 7 so that the rollers do not collide with each other and are held in the rolling element holding chain 1. , So that it does not fall out freely.

  As shown in FIGS. 26 and 27, the two half spacers 9 arranged at one end of the flexible metal piece 2 correspond to the two half spacers 10 arranged at the other end, and Corresponding stereotactic pins and stereotactic holes on the half spacers 9 and 10 corresponding to. As shown in FIGS. 28 and 29, after the half spacers 9 and 10 are bonded and fixed to each other, a complete spacer is formed, and both ends 27 and 28 of the hole 21 on the metal piece 2 are overlapped and fixed to each other. The sealed rolling element holding chain 1 is formed. The length of the overlapping of both end portions 27 and 28 can be increased or decreased according to the number of opposed half spacers 9 and 10.

  As shown in FIGS. 30, 31, 32, and 33, another configuration of the metal piece rolling element holding chain 1 according to the present invention is to connect at least one metal piece 230 with a half spacer 340 to form a semimetal. The half-spacer 340 in the single rolling element holding chain 11 has opposing positioning pins 342 and positioning holes 341, and the diameter of the positioning pins 342 is larger than the diameter of the opposing holes 231 of the at least one metal piece 11, and accordingly. The at least one metal piece 230 and the half spacer 340 can be joined by an injection molding method. The two semi-metal piece rolling element holding chains 11 are connected to the complete rolling element holding chain 1 via the coupling between the opposing positioning pins 342 and the positioning holes 341, and the two semi-metal pieces 230 are tightly connected to each other. Combined with

It is a side view of the metal piece rolling element holding chain which has the softness | flexibility which this invention discloses. It is II sectional drawing of FIG. It is II-II sectional drawing of FIG. It is a fragmentary figure of the metal piece which has the softness | flexibility of the rolling element holding chain which this invention discloses. It is circulation explanatory drawing in the moving member of the metal piece rolling-element holding chain which has the flexibility which this invention discloses. It is a side view of the metal piece slat design of the rolling element holding chain which this invention discloses. It is a perspective view of the 2nd type design of the spacer of a rolling element chain which this invention discloses. It is an enlarged view of A of FIG. It is a side view of the 3rd type design of the spacer of the rolling element holding chain which this invention discloses. It is an enlarged view of B of FIG. It is a perspective view of the first half spacer of the third type design of the spacer of the rolling element holding chain disclosed by the present invention. It is a top view of the first half spacer of the 3rd type design of the spacer of the rolling element holding chain which this invention discloses. It is III-III sectional drawing of FIG. It is a top view of design of the metal piece of the multiple piece of rolling element holding chain which this invention discloses. It is an enlarged view of C of FIG. It is explanatory drawing of design of the metal piece of the multiple piece of rolling element holding chain which this invention discloses. FIG. 5 is a side view of a left half spacer having a relatively wide groove and coupled to a plurality of metal pieces in the design of a plurality of metal pieces of a rolling element holding chain disclosed by the present invention. In the design of the metal piece of the multiple piece of rolling element holding chain which this invention discloses, it is explanatory drawing of the left half spacer which has a comparatively wide recessed groove and couple | bonds on a several metal piece. FIG. 6 is a top view of another design of at least one metal piece of a rolling element holding chain disclosed by the present invention. It is a side view of the design by which the connection part of the rolling element holding chain which this invention discloses is coat | covered with resin. It is IV-IV sectional drawing of FIG. It is VV sectional drawing of FIG. FIG. 3 is a perspective view of a holding chain design in which the rolling element disclosed by the present invention is a roller. It is a top view of the holding chain design which the rolling element which this invention discloses is a roller. It is VII-VII sectional drawing of FIG. It is a side view of holding chain end part connection design of the metal piece of a plurality of pieces which this invention discloses. FIG. 6 is a top view of a multi-piece metal piece holding chain end connection design disclosed by the present invention. FIG. 5 is a top view of an interconnect design for a holding chain end of a plurality of pieces of metal disclosed by the present invention. It is explanatory drawing of the interconnection design of the holding | maintenance chain edge part of the metal piece of the multiple piece which this invention discloses. 1 is a side view of a semi-metal piece retaining chain design disclosed by the present invention. FIG. It is sectional drawing of the VII-VIII sectional drawing of FIG. 30, and a corresponding other half metal piece holding chain. FIG. 5 is an illustration of the mutual coupling of two metalloid holding chain designs disclosed by the present invention. It is an enlarged view of D of FIG. It is explanatory drawing at the time of the turning path | route of a metal strip being curved. It is a geometrical relationship diagram of each heel when the heel metal band is bent. It is the geometrical relationship figure at the time of the straight line and curve of a metal strip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rolling body holding chain 2 Metal piece 3 Spacer 5 Rolling body row | line | column 6 Motion member 7 Roller 8 Roller spacer 9, 10 End spacer 11 Semi-metal piece rolling body holding chain 21 Rolling body arrangement | positioning hole 22 provided in the axial direction Horizontal part 23 Connecting portion 24 Horizontal protrusion 25 Horizontal recess 26 Horizontal holes 31 and 32 Two left and right half spacers 33 Left and right two half spacer positioning pins 34 Left and right two half spacer holes 35 Left and right two half spacer metal Single receiving groove 41, 42 Front and rear half spacers 43 Front and rear half spacer spacer pins 44 Front and rear half spacer holes 45 Front and rear half spacer metal piece receiving grooves 46 Front and rear half spacer spacer pins End surface 61 Circulation path 62 Circulation path guide groove 63 Circulation path 64 Track area 65 Turning path area 200 Several metals Single connection part 201, 202, 203, ... Multiple metal pieces 210 Horizontal part 220 of multiple metal pieces At least one metal piece 221, 222 Two upper and lower semi-horizontal parts 223, 224 At least one metal piece connection part 231 Holes 301 corresponding to each other of the metal pieces Resin coating layer 320 Two left and right half spacers 340 Half spacer 341 Positioning hole 342 Positioning pins 350 and 450 Grooves 410 and 420 slightly larger than the plurality of metal pieces Two front and rear half spacers

Claims (16)

  The metal piece is composed of at least one flexible metal piece and a plurality of spacers, and the metal piece is provided with a plurality of holes arranged in the axial direction, and the two holes are spaced apart from each other by two adjacent holes. The spacers are separated by a horizontal portion having, and the spacers are coupled on the horizontal portion, hold the rolling elements of the alignment rolling elements in the holes, and maintain a constant distance from each other in the circulation path in which the chain unit circulates, Rolling body holding chain unit that operates without collision with each other.

The thickness h of the flexible metal piece is E, the elastic modulus of the metal, ρ is the minimum radius of curvature during operation of the rolling element holding chain circulation path, and R _p0.2 is 0.2% of metal. The rolling element holding chain unit according to claim 1, which has a yield strength of plastic deformation.   The rolling element holding chain unit according to claim 1, further comprising a protrusion, a recess, or a hole that prevents movement of the spacer on the horizontal portion of the metal piece.   The rolling element holding chain unit according to claim 1, wherein the spacer is formed of a resin material.   The rolling element holding chain unit according to claim 1, wherein the spacer is directly injection-molded on a metal piece.   A concave groove that accommodates the horizontal part of the metal piece on the left and right half spacers, and the spacer is joined to the horizontal part of the metal piece by coupling the left and right half spacers through the corresponding positioning pins and holes. The rolling element holding chain unit according to claim 1.   A concave groove that accommodates the horizontal part of the metal piece on the two front and rear half spacers, and the spacer is connected to the horizontal part of the metal piece by connecting the two front and rear half spacers through the corresponding positioning pins and holes. The rolling element holding chain unit according to claim 1.   7. The rolling element holding chain unit according to claim 6, wherein the positioning pins of the two front and rear half spacers protrude from the two half spacers to form a covering surface of the rolling element on an end surface of the positioning pin.   The rolling element holding chain unit according to claim 1, wherein the hole of the metal piece is formed by pressing, etching, or laser cutting. The superposition of the metal pieces constitutes the thickness h1, h2, h3 of each metal piece, and according to this,

2. E is the elastic modulus of the metal, ρ is the minimum radius of curvature during operation of the rolling element holding chain circulation path, and R _p0.2 is the yield strength of 0.2% metal plastic deformation. Rolling element holding chain unit.   The rolling element holding chain unit according to claim 6 or 7, wherein the concave groove for accommodating the metal piece is slightly larger than a horizontal portion of the metal piece.   2. The rolling element holding chain unit according to claim 1, wherein the horizontal portion of the metal piece is divided into two upper and lower half horizontal portions, and the spacer is connected to the two upper and lower half horizontal portions.   The rolling element holding chain unit according to claim 1, wherein the metal piece connecting portion is covered with a spacer and a resin coating layer that is injection-molded into one.   The rolling element holding chain unit according to claim 1, wherein the rolling element is a roller ball or a roller that operates in a circulation path of the aligned rolling elements.   At least one half spacer is provided at both ends of the rolling element holding chain, and a complete spacer is completed through the coupling and fixing of at least one pair of two half spacers. The rolling element holding chain unit according to claim 1, wherein the rolling element holding chain unit is connected and fixed to form a sealed rolling element holding chain.   The rolling element holding chain is composed of a combination of two left and right half metal piece rolling element holding chains. Of these, the half metal piece rolling element holding chain is joined by injection molding a plurality of half spacers on the same side as at least one metal piece. The half spacers of the two left and right half metal piece rolling element holding chains are coupled to the complete spacer through the coupling of the corresponding localization pin and the localization hole. The rolling element holding chain unit according to claim 1, wherein the two left and right half metal piece rolling element holding chains are coupled to a complete rolling element holding chain unit.

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