TWI233472B - Recirculation device of ball screw - Google Patents

Abstract

The present invention relates to the recirculation device of ball screw, the nut of ball screw include the nut-part and the recirculation device. The recirculation device is make up of the reflow part and the stable part. The characteristic of the recirculation device is the reflow part inset the hole in the nut-part by angle of inclination and rotate a angle, cause the reflow part wedge in the hole of the nut-part. Besides, the stable part inset in the hole of the nut-part from outside, and co-operate with outside of the reflow part for strengthen the function of fixed the reflow part.

Description

1233472 V. Description of the invention (1) [Technical field to which the invention belongs]: The recirculation device in the nut, the reflowing rod and the nut move with each other to complete the ring-like rolling, and let the screw [previous technology] ball Screw ball return to the six-cycle method and end plug method, etc .: J is: Bu cycle method, internal return of internal nuts to account for = i ', Chinese and foreign cyclical recirculation system will lead the balls to the inside of the nut. : Ring, the flow system ball is directly guided to the ball in the internal thread of the cap to return the flow is to return the screw thread 偻 # 夕 ^^, 1 towel hole 迢 to complete the cycle. The 9Π ... ^ type reflow is like the US patent US 4357838, in which the end face 10 and the end face 16 are axially inserted into the nut 丨 〇 2 ^ 2 = 12 The rollers are led to the weaving and J back to the bottom A positioning groove 48 on the side and a positioning groove of the nut 10 are provided with a fixing hole 52 to fix the end plug 20 on the nut 10; the end plug also has a turning path 62 and a cover plate 68, so that The ball 70 is steered by the steering plate 68 to complete the recirculation cycle. 彳 ^ 2 and 盍 This traditional ball screw end plug recirculation device cooperates with the screw and nut to make its structure complex; secondly, because of the end plug The type needs to be matched with the inner diameter of the nut, so the accuracy is required. In addition, the end plug ^ ^ and ^ position method must first install the end plug along the axis into the end face of the nut, and then the positioning surface of the end plug needs Snap in the positioning groove of the nut to restrict the freedom of the ^ plug ^ ^, and then use the fixing screw to pass through the end plug to fix it ^ ^

Page 6 1233472 V. Description of the invention (2) — The fixed nut is plugged to the nut with a locking end .. ^ The number of passes is more complicated and the accessories are complicated. The assembly end is plugged with its nut ^ ^ /, miscellaneous, ,, and difficult, which results in a solid manufacturing ... " ... 士 — "r mesh processing steps are more complicated, and the accessories are more complicated and expensive. _ 1 入 之= In ten words, the traditional plug screw return method of the traditional ball screw has improved precision [hair group, fixed [starting to make the screw method more group, the purpose of the mold fit] The engaging parts of the present invention, and the content] The origin of the ball screw is that the nut of the nut has an axial direction to turn the outer shape of the invention. The first step is to provide a ball screw to the aperture and the backflow 222 series. Reflow positioning module,… outside: Reduce the processing steps and time of the body of the nut i. Move the nut sleeve pair; In addition to the recirculation path in the main body, use the nut to match with the nut until the reflow is determined by the nut Penetrate the through hole of the nut; the round hole in the nut of the present invention is not on the flow positioning rod of the body of the tilting module body for ball body processing and utilization, and the end plug body and the return flow have internal Snail The diameter of the oblique installation and positioning of the dry conversion direction and the inner and outer diameter of the solid outer circle are set between the module settings. There is a reflow method to locate the module between the inside and the outside. The reflow is to complete the reflow to the hole shape and angle. Through the fixed function. There is a plurality of diameters, and the connecting nut circulates between the positioning die and the return diameter of the ball of the nut body ball. The return fixed rotation card makes the inner diameter screw

1233472 Fifth, the invention " " a * one and the relative geometric shape of the radial hole 'make the radial hole to cover the entire set of reflow set, and restrict the axis direction of the reflow positioning module to be free. The reflow positioning module of the invention is composed of two parts, the reflow part and the fixing part. The reflow part is provided with an engaging surface and a radial hole of the nut body. ::: Matching groove, reflow part-convex engagement The surface and the radial hole are recessed into a # -mouth slot, which cooperate with each other to form a group of engaging structures; and on the body of the return flow piece: the matching surface and the fixing piece cooperate to position and fix the return flow piece to the nut and towel. The installation method of the reflow positioning module of the present invention is: firstly reflow the reflow piece into the radial hole from the body at an oblique angle, and then rotate the reflow piece: the engaging surface of the reflow piece is engaged with the radial hole The engaging groove = reflow part; the fixing part is located outside the reflow part in the radial hole ^ 2: The outer hole of the radial hole is tightly matched with the outer side of the reflow part to strengthen: The positioning and fixing function of the cicada enables the reflow positioning mold The steering path of the group connects the internal thread of the body and the return through hole, so that the roller _ * j is connected to the circulation path. . No /, awkward scrolling

5. The fixing part of the reflow positioning module of the present invention can be designed to have a shape or the material of the fixing part is designed to be an elastic plastic material, so that the = radial hole is not easy to fall out of the radial hole. Can also be fixed; Mouth. The ten is an oil-containing material, and the return positioning material I and the fixing member are formed together to slide the return path. Makes the ball passing through the turning path accessible. For further details, please refer to the characteristics and technical content of this description.

Face 1233472 V. Description of the invention (4) The following description of the embodiments of the present invention and the drawings and diagrams are for illustration and reference only, and are not intended to be used for this purpose. Knowing what to do and how to limit it [Embodiment] The first figure is a three-dimensional schematic diagram of the ball screw of the present invention. The nut of the double rod mainly includes the nut body 10 and the return positioning _medium ball nut. The internal thread in the diameter is even more: the return flow through hole 12 in the axial direction of the J flow does not interfere with the internal thread 13. The return = two has one

Then: there is a turning path 214, providing ball (not shown) conversion; to the two groups: 0 direction hole is a long hole), so that the radial hole 11 penetrates radially = the inner and outer diameter of 0, and communicates with the nut body 1G The internal thread 13 is designed to return to the mesh 2 system = the position module 20 is provided in the radial hole center of the nut body 10 to limit the axial direction freedom of the return positioning module 20. # 太 2 图! 'The first position of the reflow positioning mold: an exploded view "; the third image of the pearl snail: a schematic diagram of a radial section; of the reflow positioning module right ^ grasping and fixing parts 22 combination of two parts, reflow parts 21 set up

The mouth surface 211, the mating surface 212, the steering portion 213, the turning diameter 214, etc., the two portions 213 guide the balls (not shown) in the nut body 10 into the turning path ^ The turning path 214 guides the balls to change directions to enter the nut body 10, the return circulation is completed in the return through-hole 12; and the fixing member 22 is provided with a mating face with a tapered inner surface and the matching surface 2 丨 2 of the return member 21, which can restrict the return member 21 in the nut body Freedom of rotation in 1G axis direction to prevent backflow 21

1233472

Rotate up. In addition, the engaging surface 211 of the return piece 21 is engaged with the engaging groove 1 1 1 of the radial hole 11 of the nut body 10, and the radial freedom of the return piece 2 丨 is restricted, so that the return piece 21 is positioned and fixed. On the nut body 丨 〇. The fourth figure is a schematic diagram of the assembly process of the reflow positioning module in the third figure; as shown in FIG. 4A, the reflow member 21 is first installed into the radial direction of the reflow through hole 12 from the inner diameter of the nut ^ 10 at an inclined mounting angle. Hole 丨 丨; rotate ^ reflow member 21 by an angle as shown in FIG. 3, that is, as shown in FIG. 4C, the return surface 21 of the reflow member 21 is stuck to the hole " The second; = the radial hole 11 of the body 10 is inserted into the fixing member 22, and the assembly is completed as shown in FIG. 4E. The fixing member 22 is closely fitted with the outer side of the returning member 21 to strengthen the positioning and fixing function of the returning member 21. The fifth diagram is a schematic axial sectional view of a ball screw according to another embodiment of the present invention; the sixth diagram is a schematic diagram of the assembled ball of the reflow positioning module of the fifth diagram; wherein the turning path 214 of the reflow positioning module is composed of the recirculation member 21 and the fixing member 22 is formed together, and the material of the fixing member 22 can be an oil-containing material, so that the ball 30 passing through the turning path 214 can be lubricated; in the fifth figure, the nut body 10 has internal threads 1 3 in the inner diameter, and There is an axial return through hole 12 between the inner and outer diameters that does not interfere with the internal thread 13. The return piece 21 and the fixing piece 22 are provided in radial holes (not shown) of the Z nut body 10, so that the turning path 2 1 4 connects the internal thread 1 3 of the nut body 1 0 and the return hole 1 2 'Provide ball (not shown) to change direction to complete the recirculation cycle, so that the ball (not shown) has a complete rolling cycle path. To sum up, this case is not only innovative in terms of space type, but also can enhance the above-mentioned multiple effects over conventional technologies.

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Page 111233472 Brief description of the drawings [Simplified illustration of the diagram] The first diagram is a three-dimensional schematic diagram of the ball screw of the present invention. The second diagram is an exploded schematic diagram of the reflow positioning module of the first diagram. The third diagram is a radial direction of the ball screw of the present invention. Sectional schematic diagram. The fourth diagram is the third diagram of the reflow positioning module assembly process. The fifth diagram is the axial sectional view of the ball screw in another embodiment of the present invention. The sixth diagram is the fifth diagram of the reflow positioning module assembly ball.

[Description of main component symbols] 10 Nut body 11 Radial hole 111 Engagement groove 12 Return flow hole 13 Internal thread 20 Reflow positioning module 21 Reflow piece 21 1 Engagement surface 212 Mating surface 213 Steering portion 214 Steering path 22 Fixing member 221 mating surface 23 fixture 30 ball

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Claims (1)

1233472 VI. Application for patent scope 1. A reflow positioning module for a ball screw, the nut of the ball screw is fitted on the screw, and relative movement is caused by the ball rolling between them. The nut includes: a nut body, An internal thread is provided on the inner diameter to cooperate with the above-mentioned screw, so that the ball is rolled therein, and an axial return through-hole is provided between the outer diameter of the nut body and a plurality of diameters are provided on the outer circumference of the nut body. Directional hole, the radial aperture penetrates the inner and outer diameter of the nut body, and communicates the internal thread and the return through hole; a return positioning module is disposed in the radial hole of the nut body, and the return positioning die There is a turning path in the group to provide the ball switching direction to complete the recirculation cycle. The reflow positioning module is composed of two parts: the reflow part and the fixed part. The reflow part has a convex engaging surface, and the radial direction of the nut body The hole has a recessed engaging groove, and the reflow member is inserted into the radial hole from the nut body at an inclined angle, and then the reflow member is rotated by an angle so that the engaging surface of the reflow member engages in the radial direction. The return groove is fixed in the engaging groove; the fixing element is provided on the outer side of the return element in the radial hole, and the fixing element is plugged into the radial hole to closely cooperate with the outer side of the return element to strengthen the positioning of the return element. Fixed function: The turning path of the return positioning module is connected to the internal thread of the nut body and the return through hole, so that the ball has a complete rolling cycle path. 2. If the ball screw reflow positioning module of item 1 of the patent application scope, the radial hole is a long hole. 3. If the reflow positioning module of the ball screw of the first patent application scope, Page 13 1233472 6. The fixed parts in the scope of patent application are elastic plastic. 4. If the recirculation positioning module of the ball screw of item 1 or 3 of the scope of the patent application, the reversing positioning module's turning path is formed by the reflow member and the fixing member, the above fixing member is an oil-containing material and can be lubricated. Balls of the above steering path. Page 14