TWI268999B - Spacer used in roller screw - Google Patents

Abstract

The spacer used in roller screw, which assembly between two adjacent and in crossed arrangement rollers. The maximum dimension of shape of spacers which less than the out diameter of rollers, and set two grooves which corresponding two adjacent rollers on it, the extending direction of two grooves are vertical to each other and positioned two adjacent rollers in two lines contact keeping them apart from each other at all time. The assembly of rollers and spacers have two axial degree of freedom and easily to form helix and line to apply to roller screw system.

Description

1268999 V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a roller nut structure, and more particularly to a method for preventing rollers from colliding with each other and allowing the roller and the spacer to easily pass through the spiral guide groove. The spacing structure of the recirculation hole intersection. [Prior Art] Please refer to Fig. 1, which is a schematic view of the structure of a roller screw of the patent No. 2 0 0 2 - 4 8 1 4 3, and a screw is arranged between the screw 8 1 and the nut 8 2 . a guide groove 8 1 1 , 8 2 1 for a plurality of rollers 8 3 to be disposed therebetween, and an axially extending return hole Λ (not shown) is bored in the nut 8 2 and a reflow member is disposed to The roller 8 3 circulates the roller S therebetween, and the rolling of the roller 8 3 reduces the frictional force of the relative movement between the screw 8 1 and the nut 8 2 . In order to prevent the adjacent rollers 8 3 from colliding with each other during the cyclic rolling process, the frictional resistance and the noise are increased. Therefore, the above structure may open a ring groove 8 3 1 in the middle of the outer circumference of each roller 8 3 for arranging one. The spacer ring 8 4 and the grooves 8 1 1 and 822 are respectively disposed in the spiral guide grooves 8 1 1 and 8 2 1 corresponding to the spacer ring 8 4 for the spacer ring 84 to be accommodated therein, so that adjacent ones can be effectively avoided. The rollers 83 3 collide with each other during the cyclic rolling. • Although the foregoing structure can avoid the problem that the rollers collide with each other during the cyclic rolling process, it is necessary to add a ring groove 8 3 1 to each of the rollers 8 3 , and each of the spiral guide grooves 8 1 1 , 8 It is also necessary to add grooves 8 1 2, 8 2 2 in 2 1 , which will make the manufacturing process more troublesome. Moreover, this structure is mainly designed for rollers arranged in parallel, such as

Page 6 1268999 V. INSTRUCTIONS (2) If it is to be used in a roller screw in which the rollers are arranged in a crosswise arrangement, it is necessary to arrange two sets of grooves perpendicular to each other in the corresponding spacing ring in the spiral guide groove, which will make the spiral guide The structure of the trough becomes more complicated and not easy to manufacture.

Since the return hole is extended in a straight line, the shape of the return channel is complicated and the curvature is small. If two sets of grooves perpendicular to each other are arranged in the return channel, the flow path structure of the reflow member becomes complicated. It is difficult to manufacture, and also because the radius of curvature of the return channel is small, the spacer ring and the groove are prone to interference. Φ US Patent No. 6 5 7 5 6 3 2 provides a solution to this problem. Please refer to FIG. 2 , which is a schematic view of the structure of the US Pat. No. 6 5 7 5 6 32, which is mainly provided with a square spacer ring 9 2 in each diagonal diagonal sleeve of each roller 9 1 , and At the bottom of the spiral guide grooves 9 3 1 and 9 4 1 of the nut 9 3 and the screw 94, a groove 9 3 2 and 9 4 2 are respectively formed corresponding to the spacer ring 9 2 for receiving the spacer ring 9 2 . Since the spacer ring 9 2 is disposed diagonally opposite to the roller 91, it is only necessary to provide a groove for each of the spiral guide grooves 9 3 1 and 94 1 for the rollers arranged in the cross row. ^ The structure of the US Patent No. 6 5 7 5 6 3 2 can overcome the complexity of the structure of the two types of grooves required to face the cross-arranged rollers of the Japanese Patent No. 2 0 0 2 - 4 8 1 4 3 The problem. However, the opening of the grooves 9 3 2, 9 4 2 at the bottom of the spiral guide grooves 9 3 1 , 9 4 1 still makes the manufacturing process more troublesome. Furthermore, the US patent No. 6 5 7 5 6 3 2 uses a square shape.

1268999 V. INSTRUCTIONS (3) Sheet-shaped spacer rings, square-shaped spacer rings are not conducive to running in a return path with a small radius, however, at the intersection of the spirally wound spiral guide groove and the straight-line extending return hole The radius of the return channel must be small, so the use of square-shaped spacer rings can be a problem of thousands or even jamming. Therefore, how to design a spacer which can avoid the collision of the rollers and which easily passes through the return passage becomes the main subject of the present invention. SUMMARY OF THE INVENTION The main object of the present invention is to solve the aforementioned problems, and to provide a spacer for a roller screw, which mainly designs the maximum size of the spacer 1 to be smaller than the length of the roller, and is relatively opposite to the spacer. Two grooves are disposed, and the extending axial directions of the two grooves are perpendicular to each other, and the two grooves can respectively be respectively abutted by two adjacent rollers arranged in a crosswise manner, so that the rollers can be separated by the spacer when traveling Separate to avoid collisions, and each spacer maintains two axial degrees of freedom between the two intersecting rollers, and avoids collision of the rollers, and can achieve spiral guides and straight lines that are easily twisted by spirals. The effect of the return hole intersection. The second object of the present invention is that the spacer is sandwiched by two adjacent rollers, and the maximum dimension of the spacer profile is designed to be smaller than the length of the roller _7 so that the spiral guide groove of the nut and the screw is not The structure of the corresponding spacer needs to be additionally processed, and the structure is simple and easy to manufacture. In order to achieve the above object, the present invention is to provide a plurality of rollers arranged in a spiral arrangement corresponding to the screw and the screw, so as to reduce the friction between the nut and the screw by rolling the rollers. And in any two

1268999 V. INSTRUCTIONS (4) A spacer is arranged between adjacent rollers, and the outermost shape of each spacer is smaller than the length of the roller, and each spacer corresponds to two adjacent rollers and eight feet. The extending axial directions are perpendicular to each other, and the two adjacent rolling knives arranged by the two different knives are arranged in a two-point contact manner by the two adjacent burrs. Thereby, the spacer maintains two axial degrees of freedom between the two intersecting faces and the eight-column, thereby avoiding the roller train and easily passing through the return passage. In order to further understand the features and technical contents of the present invention, the following description of the embodiments of the present invention and the drawings are provided. However, the actual drawings are for illustrative and reference only, and Used to make 2 ways S to the present invention. Further limitation: [Embodiment] Please refer to Figs. 3 to 5, which are the first embodiment selected for use in the present invention. The roller screw of the embodiment is composed of a nut i and a screw 2, and the screw 1 and the screw 2 are provided with spiral guide grooves 1 1 and 2, and a plurality of rollers arranged in a mutually intersecting manner are arranged therein. 3, and in order to enable each roller 3 to roll cyclically 'therefore, a reflow member 1 2 and a return hole 1 3 ' will be provided in the nut 1 and the outer diameter D of the roller 3 is designed to be larger than its length l, / Cycle rolling of each roller 3 to reduce the Qin force when the nut and the screw move relative to each other. Please refer to Figure 3 for a spacer 4 between two adjacent rollers 3, and the maximum size of each spacer 4 is smaller than the length L of the roller 3, and each spacer 4 corresponds to two adjacent ones. The rollers 3 are respectively provided with a recess 4 1 , 42 ' the extending axial directions of the recesses 4 1 , 42 are perpendicular to each other.

Page 9 1268999 V. Description of the Invention (5) The two rollers 3 are arranged to be arranged by the two grooves 4 1 and 4 2 respectively; in this embodiment, the spacer 4 has a spherical partial shape. The outer diameter d is smaller than the length L of the roller 3, and the shape of each groove 4 1 , 4 2 is formed by an arc having a diameter smaller than the diameter D of the roller 3, so that the cross section of each groove 4 1 , 4 2 It has a two-point contact with the roller 3 system. Further, the spacer 4 further has a through hole 4 3 penetrating through the two grooves 4 1 , 42 , and the through hole 4 3 is provided for lubricating oil to pass through the two grooves 4 1 , 4 2 to provide a better lubricating effect. Since the spacer 4 of the present invention is provided with two extending axially perpendicular 彳gj grooves 4 1 , 4 2 for the two adjacent rollers 3 arranged in a crosswise manner, when the rollers 3 and the spacers are 4 When running in a linearly extending return hole or a spirally wound spiral guide groove, each roller 3 will maintain contact with the groove 4 1 or 4 2 of the adjacent two spacers 4, so that the rollers 3 can be maintained. The correct direction of advancement; when each roller 3 and each spacer 4 runs between a spirally wound spiral guide groove and a linearly extending return hole, the spacer 4 of the present invention and the two adjacent rollers arranged in a crosswise arrangement The three chambers maintain two axial degrees of freedom, so that the spacers 4 can be moved by the relative movement of the two adjacent rollers 3 (as indicated by the mark A in Fig. 5). The device 4 is easily passed through the intersection of the spirally wound spiral guide groove and the linearly extending return hole (ie, the smaller diameter flow path), and each of the spacers 4 can still keep the adjacent two rollers 3 3 spaced apart, Avoid problems such as collisions. Further, the design of the spacer of the present invention does not need to be provided with a groove for the spacer ring in the screw guide groove of the nut and the screw as in the prior art, so that the structure of the present invention is simpler and easier to manufacture, and Can reduce manufacturing costs.

Page 10 1268999 V. INSTRUCTIONS (6) In summary, the spacer of the present invention can be disposed between the rollers arranged in a cross arrangement to avoid collision of the rollers, and to achieve a spiral guide that is easily passed through the spiral winding The effect of the intersection with the reflow hole extending in a straight line. Of course, the invention is derived. For example, the groove shapes of the spacer are designed to be thickened by at least two arcs; as shown in Fig. 6, a second embodiment of the invention, wherein the grooves 4 1 A of the spacer 4 A, 4 2 A shape is a Gothic design consisting of two arcs, so that the cross section of each groove is in contact with the roller system; as shown in Fig. 7, it is the third embodiment of the invention. For example, each of the grooves 4 1 B, 4 2 B of the spacer tB is a complex arc composed of a plurality of arcs, so that the cross section of each groove can be in contact with the roller at two points; Both embodiments can achieve the same effects as the first embodiment described above. Referring to FIG. 8, which is a fourth embodiment of the present invention, the cross-sectional shapes of the grooves 4 1 C, 4 2 C of the spacer 4 C are V-shaped, so that the cross sections of the grooves can also be obtained. The contact with the roller is in two points to achieve the same effect as the first embodiment described above. The above description of the embodiments is intended to be illustrative of the invention and is not intended to limit the scope of the invention.

Page 11 1268999 Brief description of the diagram [Simple description of the diagram] Figure 1 is a schematic diagram of the roller screw structure of the Japanese Patent Application No. 2 0 0 2 - 4 8 1 4 3. Constructing Rod Stud Roll Case No. 2 3 6 5 7 5 6 The diagram of the United States and the United States is shown in Figure 2. The figure is intended to show the clearness of the inter-slit snail and the column of the corrugated body of the cross-sectional plane. The system is shown in Figure 3 4 The first diagram of the schematic diagram is shown in the figure. The flow path is separated from the ring and the column is separated by the column and the column is rolled. Figure 5 6 The first figure shows the example of the flattening of the mating compartment and the column rolling. The three figures are shown in the figure 7. The flat surface of the mating compartment and the column rolling is applied. The first picture is intended to be 8] C] AB 2 says 2 2 4 4 4, symbol, C piece 2 AB 1 element TH 4_ oo 1± Γ-Η 4_ to 1 piece 2 444 slot main cap flow The rod spacer slot is recessed and the screw is screwed back. The through hole is 1 2 , 2 r — Η -4 13 , ABC slot 1 14 4 4 guide hole 3 4 Cyclone separator column is an slot interval between the inter-compartment spiro recess rollback

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Claims (1)

1268999 VI. Patent Application No. 1 · A roller is sleeved with a spacer disposed in a screw, and the roller is composed of a screw. The nut and the screw are arranged in a plurality of mutually arranged roller bars. The cap and the screw guide groove are used, and the two rolls of the two rollers are perpendicularly rolled by the two rolls, and each of them is formed according to the application. According to the application, the size column of each move in the application is divided into two. For each recess, please use the special spacer. Please use the recess. Please use a recess between the concave reduction nut and the screw relative displacement roller. The length of the roller is smaller than the length of the roller, and each has a groove. The two grooves are respectively provided by the two grooves for the cross-section of the groove and the roller are in a two-point range. The shape of the roller groove described in item 1 of the two grooves is a hole having a diameter smaller than that of the friction device at the time of rolling, and two adjacent contact screws of the extending shaft of each pair of spacers. The force of the column diameter between the screws; and the shape of the spacer should be adjacent to each other. The spacer, the spacer, and the spacer of the roller screw according to the first aspect of the invention, the cross-sectional shape of the groove is V-shaped. The spacer of the roller screw according to Item 1, wherein the groove is formed by at least two arcs. Page 14