JP3042795U - Four-row steel ball linear ball rail - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To increase the strength of steel rails and "stiffness" of a steel ball to be used, and at the same time, to limit the use of space to a linear ball rail. provide. The present invention relates to a linear ball rail of four rows of steel balls, the linear ball rail comprising four rows of steel balls 71, 72, 73,
74. By rearranging the structure, the steel balls 71, 72, without changing the space limitation,
In order to make the volume of 73, 74 larger than the conventional design and to improve the smoothness of the rail 1, the present invention includes two new circulation designs.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a linear ball rail, particularly a linear ball rail having four rows of steel balls to further increase the load capacity.

[0002]

[Prior art]

 Linear ball rails have been widely used in precision machines and ware since early times, and because of the need for miniaturization of precision machines and ware, small volumes and excellent load capacity are required. ing.

[0003]

[Problems to be solved by the device]

 FIG. 16 is a diagram for explaining a conventionally known linear ball rail. The connecting roots 33, 34, 35 and 36 in the figure are generally radial, so that interference generated by the return holes 85 and 86 and the fixing screw hole 28 is prevented. As a result of adding the thickness of the slide body 2 to prevent it, the height of the rail was increased and the space used was increased. At the same time, the instability of the mechanism was increased. FIG. 17 is an explanatory view of another type of well-known linear ball rail, in which the connecting routes 33, 34, 35, 36 have a generally horizontal direction, and because of horizontal return, the return space in which circulation is possible is relatively narrow, In order to prevent the return holes 85, 86, 87, 88 from interfering with the side surface 29 of the slider, the diameter of the steel ball is normally reduced as much as possible. On the contrary, the basic dynamic load and static load (rail) and the "stiffness" of the rail are significantly reduced. Even when considering not reducing the diameter of the steel balls in the partial design, the narrowing of the rail width, which results in a significantly narrower rail width, similarly affects the strength and "stiffness" of the rail. Needless to say.

The present invention has been made in order to make up for the above-mentioned drawbacks. The steel ball to be used is increased in size, thereby increasing the strength and “stiffness” of the rail, and at the same time, the space usage is restricted. The purpose is to provide a linear ball rail that is not reduced in size.

[0005]

[Means for Solving the Problems]

 The linear ball rail of the four-row steel ball according to claim 1 of the present invention is one rail, one slider body, a pair of end covers, four guide blocks, a pair of lateral steel balls. -Holder, including one upper steel ball holder. The cut surface of the abdomen of the rail is narrower than the upper and lower parts of the rail, and there are one steel ball groove with an arched section at each of the upper right, lower right, upper left, and lower left above the rail. A little larger than the radius of a steel ball. The slider body includes at least four recirculation holes, two orientation holes and four arched section steel ball grooves, of which the recirculation holes are used for the recirculation of steel balls and the surfaces on both sides. Each of the localization holes in is engaged with the localization pins of the four guide blocks. The four rows of steel ball grooves correspond to the above-mentioned steel ball grooves on the rail, the steel balls are held in the corresponding steel ball grooves, and the steel balls on the upper right of the slider body are The direction to receive the force of the ball groove is approximately 45 degrees to the upper right, the direction to receive the force of the lower right steel ball groove is to be the direction to approximately 45 degrees to the lower right, and the direction to receive the force of the upper left steel ball groove. Is approximately 45 degrees to the upper left, and the direction of the force of the lower left steel ball groove is approximately 45 degrees to the lower left. Then, a pair of end covers are connected to both ends of the above-mentioned slide body, and four connecting routes similar to a semicircle are respectively provided on the end covers so that the steel balls return from the steel ball grooves via the connecting routes. The semi-circular articulation route can be located in the arch surface, and the mouth of the recirculation hole of the articulation route is clearly lower than the slot of the steel ball, and of the end cover. Square-shaped recessed holes are provided on both sides, and the guide block can be housed by straddling both upper and lower connecting routes on the side, and projecting near the steel ball groove of the connecting route. A block is provided to guide the steel ball so that it can smoothly change its direction of movement. The four guide blocks are designed to fit into the square holes of the end cover with a square-shaped base, and each guide block has two guide slots. The steel ball in the connecting route is guided, and the guide block is provided with a cylindrical positioning pin on the joint surface with the slider body described above. The pair of lateral steel ball holders are respectively connected to the inside of the lower portion of the slider body described above, and include elongated strip-shaped arched surfaces on the lateral steel ball holders, thereby holding the steel balls, When the slider combination separates from the rail, it holds the steel balls from falling out of the slider combination, and the upper steel ball holder is connected to the bottom of the slider body in the middle mentioned above, and both sides have inclined surfaces. . The above configuration prevents the steel balls in the upper rows from falling.

In the linear ball rail of the four-row steel ball according to claim 2 of the present invention, each return hole of the slider body and each end of each steel ball groove have equal one spot holes, and Abandoning the stereotaxic holes that have been installed since then, the end cover is provided with an arch-shaped flange near the return hole of each connecting route, and a similar arch-shaped flange at each end of each connecting route near the side of the slide block main body of each guide block. Thus, the feature is that the localization pin originally installed on the guide block is abandoned by meshing with the spot hole of the slider body described above.

[0007]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view of a linear ball rail of the present invention. The arrow in the figure indicates the direction of the acting force of the steel ball on the rail. The connecting routes 33, 34, 35, 36 of the steel ball circulation system are sandwiched between the groove of the steel ball and approximately 45 degrees in the direction of the acting force of the steel ball, and the connecting route is arched. To extend the circulation reflux length. It may also require threaded holes 28, 29 for work-fixing above the slider body, so that the articulating roots on both the left and right sides extend equally outwardly from the steel ball groove and then downward. It has a curved arch-like shape, thus avoiding interference with the screw holes and increasing the circulation length.

FIG. 2 is an assembly three-dimensional view of the present invention, and FIGS. 3 to 9 are mainly a front view and a three-dimensional view of a zero accessory. The end cover 3 (FIGS. 5 and 6) of the present invention has recessed holes 31 and 32 on both right and left sides, which are respectively combined with the guide block 4 (FIG. 7), and the combination of the guide blocks 4 is as follows. There are two features. (1) The guide block 4 guides both rows of circulating steel balls at the same time, so it is relatively convenient and space-saving in assembly. (2) Since the localization pins 45 are provided on the guide block 4, accurate localization can be performed with the localization hole 21 on the slider body 2.

FIG. 10 is a three-dimensional view after the guide block 4 and the end cover 3 are combined. The two localization pins 45 in the figure can be fitted exactly into the localization holes 21 in FIG. The exact combination between the cover 3, the guide block 4 and the slider body 2 allows the steel ball to move smoothly in the circulation system. There are four projecting blocks 91, 92, 93, 94 separately provided on the end cover 3 in FIG. 10. Once the combination parts in FIG. 10 and the slider body 2 are assembled, the four The projecting blocks of the above go deep into the slider body 2, and the steel balls in the grooves of the steel balls smoothly enter into the circulation system by the guide of these projecting blocks. The situation after entering the steel ball groove from the circulation system is the same. In this type of steel ball circulation system, the groove of the steel ball above the slider body does not have a reverse angle and no additional processing is required, so the effective steel ball groove that receives the load of the steel ball The length can be extended, and the load capacity and “stiffness” of the rails are relatively increased.

8 and 9 show a steel ball holder of the present invention, FIG. 8 shows an upper steel ball holder 5, and FIG. 9 shows a lateral steel ball holder 6. The middle of the upper steel ball holder 5 is fastened with two screws onto the screw hole 22 at the lower center of the slider body 2, and the slopes 50 on both sides of the upper steel ball holder 5 have a function of keeping steel balls. In addition, in order to avoid interference with the four protruding blocks 91, 92, 93, 94 on the end cover 3, four corners 51 on the upper steel ball holder 5 are cut off. The bottom of the lateral steel ball holder 6 is equipped with two ear-shaped protruding blocks 60, and after being combined with the slider body 2, it is properly attached to both sides of the slider body 2, and the arch surface 63 is made of steel. Have the role of keeping the ball from falling.

If the smoothness of the circulation system is specifically required, the present invention has another circulation design. That is, the left and right sides of the end cover (Fig. 13) have one recessed hole 31 and 32, respectively, which are respectively combined with the guide blocks (Fig. 14), both ends of the reflux hole of the slider body (Fig. 12) and the steel balls. Spot holes 2a and 2b are provided at both ends of the groove, and arch-shaped flanges 95, 96, 97 and 98 are added at the positions where the end cover and the guide block are joined to the spot hole, thereby providing the end cover and the guide block. And when the slider body is combined, the end cover and the flange on the guide block can fit exactly into the spot hole of the slider body. Fig. 15 shows the scene after combining this type of end cover and guide block. The four round rings protruding from the end surface of the end cover fit exactly into the spot holes in Fig. 14. There is. Since the return hole and the spot hole can accurately perform the role of machining, therefore, the end cover and the guide block can be precisely positioned by the localization of the spot hole, which results in the steel ball circulation movement. It is done smoothly. This type has a smooth circulation, however, since the groove of the steel ball is provided with a spot hole, the length of the steel ball groove that is effectively loaded is shortened accordingly, and the load capacity and “ The "stiffness" is thus relatively reduced.

[0012]

【Example】

 FIG. 1 is an explanatory view of the linear ball rail of the present invention. The rail 1 of the linear ball rail in the figure is provided with four steel ball grooves 11, 12, 13, and 14 on the slider body 2. Also provided with similar steel ball grooves 81, 82, 83, 84, which correspond to the above-mentioned steel ball grooves, and the steel balls are interposed therein for load transmission. , The upper right of the steel ball 71 contacts the steel ball groove 81 at an angle of about 45 degrees, and contacts the groove 11 of the steel ball at an angle of about 45 degrees at the lower left as shown by the arrow in the figure, Reference numeral 71 indicates a direction of approximately 45 degrees to the upper right with respect to the acting force direction of the slider body 2, and steel ball 72 faces toward a direction of approximately 45 degrees to the upper left of the acting force direction of the slider body 2. The steel ball 73 is oriented in the direction of approximately 45 degrees to the lower right with respect to the acting force direction of the slider body 2, and the steel ball 74 is oriented in the direction of approximately 45 degrees to the lower left with respect to the acting force direction of the slider body 2. . The contact holes of the connecting routes 33, 34, 35, 36 and the steel ball groove are substantially horizontal, and form an angle of about 45 degrees with the direction of the load of the steel ball, and the connecting route 33 , 34, 35, 36 are equally arcuate to extend the length of the circulation, the longer the circulation, the more smoothly the steel ball recirculates and the larger the diameter of the steel ball. , The basic dynamic load static load and "stiffness" of the rail are increased. Usually, a screw hole 28 for processing and fixing is required on the slider body 2, so that the connecting routes are equally bent from the load route downward, and the return holes 85 and 86 interfere with the screw hole 28. Avoid the The screw holes 39 thus serve to tighten the nozzle.

FIG. 2 is a three-dimensional combination view of the present invention, and FIGS. 3 to 9 are mainly a front view and a three-dimensional view of the zero accessory. FIG. 5 is a front view of the end cover of the present invention. There are one recessed hole 31 and 32 on each of the left and right sides of the end cover 3, and three side surfaces of the recessed hole are flat surfaces 76, 77, 78. The upper part is a protruding curved surface 79, and this recessed hole serves to accommodate the guide block 4. There are four protruding blocks 91, 92, 93, 94 (see FIG. 6) separately on the end cover, and after the end cover and slider body 2 are combined, these four protruding blocks are Entering deeply, the steel balls smoothly enter the circulation system in the steel ball grooves 81, 82, 83, 84 by the guidance of this protruding block. At the same time, the rail 1 shrinks substantially inward at the corresponding position (15, 16 in FIG. 2) to prevent the protruding blocks 91, 92, 93, 94 and the rail 1 from interfering with each other. . The screw hole 39 of FIG. 5 serves to tighten the nozzle. The oil tank 38 is used for induction lubricating oil. After the end cover and the lateral steel ball holder of the slider body are assembled, the screws serve to tighten through holes 37 and over the screw holes 23 and 26 of the slider body.

FIG. 3 is a front view of the slider main body of the present invention, in which the slider main body has four steel ball grooves 81, 82, 83, and 84, and the groove has an arch-shaped cross section, and a radius of the arch. Is slightly larger than the radius of the steel ball and is combined with the corresponding steel ball groove on the rail, thus holding the steel ball in the steel ball groove and rolling smoothly to transfer the load. Play a role. The return holes 85, 86, 87, 88 are used to recirculate the steel balls without being loaded, the hole 21 is a positioning hole and serves as a guide block positioning, and the screw holes 22 are upper holes. The steel ball holder serves to tighten and the screw holes 26 serve to tighten the lateral steel ball holder.

FIG. 7 is a three-dimensional view of the guide block 4 of the present invention, which is provided with two guide slots 41 and 42 and can simultaneously guide both rows of circulating steel balls. Also, it is relatively convenient to assemble and occupies a small space. The positioning pin 45 is provided on the flat surface above the guide block, and by performing accurate positioning with the positioning hole 21 on the slider body 2, the relative position between the guide block and the slider body is secured, and it occurs in the combination. Prevents the interference phenomenon caused by easy-to-follow errors. The oil tank 46 is used for the guide lubricating oil. FIG. 10 is a three-dimensional view after the guide block 4 and the end cover 3 are combined, and the two localization pins 45 in the figure can be accurately joined to the localization holes 21 in FIG. The precise combination between the guide block 4 and the slider body 2 allows the steel ball to move smoothly in the circulation system. There are four protruding blocks 91, 92, 93, and 94 on the end cover 3 of FIG. 10, and once the assembly parts of FIG. 10 and the slider body 2 are combined, the four protruding blocks are the sliders. It penetrates deeply into the body and the steel balls are guided by this protruding block in the steel ball groove and smoothly enter the circulation system. The situation is similar when entering a loaded steel ball groove from a circulation system. With this type of steel ball circulation method, the steel ball groove on the slider body does not have a reverse angle and does not require any additional processing, so the length of the groove that receives the load can be effectively extended. , Load capacity and “stiffness” are relatively increased.

FIG. 8 shows the upper steel ball holder of the present invention. The upper steel ball holder 5 is inserted into the steel ball grooves 81 and 82 when the slider body 2 and the rail 1 are separated. Prevents steel balls from falling off the slider body 2. The middle of the upper steel ball holder 5 is attached to the screw hole 22 of the slider body by two screws, and the slopes 50 on both sides thereof have a function of holding the steel ball. Besides, in order to avoid interference with the protruding blocks 91, 92 on the end cover 3, all four corners 51 of the upper steel ball holder 5 are cut off.

FIG. 9 shows a lateral steel ball holder according to the present invention. The lateral steel ball holder 6 is provided in the steel ball grooves 83, 84 when the slider body 2 and the rail 1 are separated. Prevents steel balls from falling off the slider body 2. The lateral steel ball holder has a slightly special shape, with an ear-shaped protruding block 60 at the bottom, and a hole 61 used for screwing in the middle of the protruding block. After the holder 6 and the slider body 2 are assembled, the ear-shaped protruding blocks 60 can be attached to both sides of the slider body 2 with good accuracy, and the arch surface 63 serves to hold the steel ball so that it does not fall. do. FIG. 11 is a three-dimensional view of the upper steel ball holder, the lateral steel ball holder, and the slider body combined, showing the protruding blocks 93 and 94 on the end cover and the lateral steel ball holder. In order to avoid mutual interference, the lateral steel ball holder 64 has a concave shape. The end cover shown in FIG. 6 also has a middle recessed portion 99 at the connecting portion in order to avoid interference with the ear-shaped protruding block 60 of the lateral steel ball holder.

If there are special requirements for the smooth speed of the circulation system, the end cover, guide block and slider body of the present invention have different designs. FIG. 12 is a slider body of a different design according to the present invention, which is similar in structure to the slider body of FIGS. 3 and 4, except that four rows of steel ball grooves and four That is, one spot hole 2a and one spot hole 2b are provided at both ends of each circulation hole. Since this spot hole serves for precise localization, it is therefore abandoned because the localization hole 21 originally from FIGS. 3 and 4 is no longer needed.

In accordance with the slider body of FIG. 12, there is also one recess hole 31, 32 on each of the left and right sides of the end cover (FIG. 13), and there are four connecting routes 33, 34, 35, 36 and steel. The projecting blocks 91, 92, 93, 94 that guide the steel balls in the ball groove are also included, and one arch type flange 95, 96, 97, 98 is added to the connecting route near the mouth of the circulation hole. did. In the guide block (Fig. 14), the localization pin 45 is discarded and four localization flanges 43 and 44 are added instead. FIG. 15 is a three-dimensional view after the end cover of FIG. 13 and the guide block of FIG. 14 are combined. The flange 43 and the flanges 95, 96, 97, 98 in the three-dimensional view are designed to fit exactly into the spot hole 2a in FIG. Therefore, when the end cover, guide block and slider body are combined, the flanges on the end cover and guide block fit exactly into the spot holes on the slider body, resulting in accurate localization. Then, the steel ball moves and rolls smoothly.

[0020]

[Effects of the Invention] The linear ball rail of the present invention has features such as easy assembly and mounting, space saving, and accurate positioning, and at the same time, the load capacity and "stiffness" of the rail can also be raised. Can be done.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a linear ball rail of the present invention.

FIG. 2 is a three-dimensional assembly drawing of the linear ball rail of the present invention.

FIG. 3 is a front view of the slider body of the linear ball rail of the present invention.

FIG. 4 is a perspective view of the slider body of the linear ball rail of the present invention.

FIG. 5 is a front view of an end cover of a linear ball rail according to the present invention.

FIG. 6 is a perspective view of an end cover of a linear ball rail according to the present invention.

FIG. 7 is a perspective view of a guide block of a linear ball rail according to the present invention.

FIG. 8 is a perspective view of an upper steel ball holder of a linear ball rail according to the present invention.

FIG. 9 is a perspective view of a lateral steel ball holder of a linear ball rail according to the present invention.

FIG. 10 is a perspective view of the linear ball rail end cover and the guide block according to the present invention after being assembled.

FIG. 11 is a three-dimensional view of the linear ball rail according to the present invention after the steel ball holder and slider body have been combined.

FIG. 12 is a perspective view of another type of end cover of the linear ball rail according to the present invention.

FIG. 13 is a perspective view of another type of guide block of the linear ball rail according to the present invention.

FIG. 14 is a perspective view of another type of slider body of the linear ball rail according to the present invention.

FIG. 15 is a three-dimensional view of the linear ball rail according to the present invention after combining another type of end cover and a guide block.

FIG. 16 is a cross-sectional view of a conventionally known linear ball rail.

FIG. 17 is a cross-sectional view of another type of linear ball rail known in the related art.

[Explanation of symbols]

 1 rail 11, 12, 13, 14 steel ball groove 2 slider body 21 localization hole 22, 23, 26, 28, 29 screw hole 2a, 2b spot hole 3 end cover 31, 32 recessed hole 33, 34, 35, 36 Connection route 37 Guide hole 38 Oil tank 39 Screw hole 4 Guide block 41, 42 Guide slot 43, 44 Flange 45 Positioning pin 46 Oil tank 5 Upper steel ball holder 50 Slope 51 Cutting angle 52 Screw hole 6 Lateral steel・ Ball holder 60 Ear-shaped protruding block 61 Screw hole 63 Arch surface 64 Medium recessed surface 71, 72, 73, 74 Steel ball 76, 77, 78 Flat 79 Protruding curved surface 81, 82, 83, 84 Steel ball groove 85 , 86, 87, 88 Reflux hole 91, 9 , 93 and 94 projecting block

Claims (2)

[Utility model registration claims] 1. A combination of four-row steel balls and linear ball rails, wherein one rail, one slider body, a pair of end covers, four guide blocks, and a pair of lateral steels. A ball holder, including one upper steel ball holder, the abdominal section of the rail being narrower than above and below
One steel ball groove with an arch-shaped cross section is attached at each of the upper right, lower right, upper left, and lower left above the rail. The radius of the arch is slightly larger than the radius of the steel ball. Includes one return hole and two localization holes and four arched section steel ball grooves, of which the return holes are used to recirculate the steel balls, and each localization hole on both sides has four The four rows of steel ball grooves correspond to the above-mentioned steel ball grooves on the rail, and the steel balls are inserted into the corresponding steel ball grooves. The direction of being held and receiving the force of the steel ball groove on the upper right of the slider body is approximately 45 ° on the upper right, and the direction of receiving the force of the steel ball groove on the lower right is approximately right. A direction of 45 degrees, direction to receive the power of the upper left corner steel ball groove, roughly the upper left 4
The direction of 5 degrees, the direction of the force of the lower left steel ball groove is about 45 degrees of the lower left, and the pair of end covers are connected to both ends of the slider body described above, and there are four semi-circles on it. Each of the similar connecting routes is provided to allow the steel balls to enter from the steel ball groove into the return hole via the connecting route, and this semicircular connecting route can be provided in the arch surface. The mouth of the recirculation hole of the connecting route is obviously lower than the groove of the steel ball, and recessed holes similar to a quadrangle are provided on both sides of the end cover. The guide block can be stored in it, and a block protruding near the steel ball groove of the connecting route can be installed in it so that the steel ball can smoothly change the direction of movement. The four guide blocks are designed to fit into the square holes of the end cover with a square-shaped base, and each guide block has two guide slots. The steel balls in the two upper and lower connecting routes are guided, and the guide block is provided with a cylindrical positioning pin on the joint surface with the slider body, and the pair of lateral steel ball holders are Each of them is connected to the inside of the lower part of the slider body, and includes an elongated striped arch surface on top of it.
Holds the ball and keeps the steel ball from falling from the slider combination when the slider combination separates from the rail.The upper steel ball holder is connected to the bottom in the middle of the slider body described above and both sides are tilted. A linear ball of four rows of steel balls, which is characterized by preventing the steel balls of both upper rows from falling down by becoming a surface.
rail. 2. Each slider hole of the slider body and one end of each steel ball groove are equally provided with one spot hole, and the localization hole originally installed is abandoned and the end cover has a reflux hole of each connecting route. Arched flange near the mouth,
Furthermore, similar arch-shaped flanges are provided at both ends of each connecting route near the slider body side of each guide block,
The linear ball rail of a four-row steel ball according to claim 1, wherein the linear pin rail of the four-row steel ball meshes with the above-mentioned spot hole of the slider body, and the localization pin originally installed in the guide block is abandoned.