JP2013190021A - Rolling guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling guide device which promotes the smoothing of the circulation of a rolling body in an infinite circulation passage, and can raise the accuracy of the motion of a moving member with respect to a raceway member.SOLUTION: A moving member comprises: a body member having a load rolling traveling face of a rolling body and a return passage; a direction conversion part incorporating an inside direction conversion passage and having an internal peripheral side guide face of an outside direction conversion passage; and a lid body attached to the body member and having an external peripheral side guide face of the outside direction conversion passage. A position reference hole being a position reference of the direction conversion part is formed at an end face of the body member, on the other hand, a positioning protrusion pressure-inserted into the position reference hole is formed at the direction conversion part, furthermore, a whirl-stop groove parallel with the load rolling traveling face is formed at the body member along a longitudinal direction, and on the other hand, a whirl-stop protrusion engaged with the whirl-stop groove is formed at an end face of the direction conversion part opposing the body member in a state that the position protrusion is pressure-inserted into the position reference hole.

Description

  The present invention relates to a rolling guide device that reciprocally guides a movable body such as a table in a work table of a machine tool or a linear guide portion or a curved guide portion of various conveying devices.

  Conventionally, this type of rolling guide device is assembled to the raceway member via a raceway member in which a rolling surface of the rolling element is formed along the longitudinal direction and a large number of rolling elements rolling on the rolling surface. And a moving member that can reciprocate along the track member. The moving member is provided with an infinite circulation path of rolling elements, whereby the moving member can move along the track member without being restricted in stroke.

  In the rolling guide device disclosed in JP-A-2006-105296, the moving member covers a metal main body member, a plurality of circulation path assemblies attached to the main body member, and the circulation path assemblies. And a pair of lids attached to the main body member. The main body member is formed with a load rolling surface facing the rolling surface of the track member, and the rolling elements roll in a load passage defined by the rolling surface and the load rolling surface facing each other. . Each circulation path assembly to be mounted on the main body member is provided with a pipe portion inserted into a through hole formed in the main body member, and provided at one end of the pipe portion and on an end surface in the moving direction of the main body member. And a direction changing portion to be arranged.

  The pipe portion is formed with a return passage of a rolling element parallel to the load passage, while the direction changing portion has an internal direction change path connecting the return passage and the load passage. In addition, an outer circumferential guide surface of an outer direction change path intersecting the inner direction change path is formed on the outer side surface of the direction changing portion, and the circulation path assembly is mounted by attaching the lid to the main body member. When covered, an outer direction changing path is formed between the direction changing portion and the lid.

  The infinite circulation path of the rolling element is composed of a combination of a pair of circulation path assemblies, and the pair of circulation path assemblies are mounted facing each other with respect to the main body member. At this time, the pipe portion of each circulation path assembly is inserted into a separate through hole formed in the main body member, and the tip of the pipe portion protrudes through the main body member to change the direction of the opposite circulation path assembly. It is connected with an outside direction change path in a part. That is, the combination of the pair of circulation path assemblies forms an infinite circulation path that makes a round in the order of the load path, the inner direction change path, the return path, the outer direction change path, and the load path. Two circuit infinite circulation paths are constructed by crossing the direction change path and the outer direction change path.

JP 2006-105296 A

  In order to smoothly circulate the rolling elements inside the moving member and reduce the movement resistance of the moving member with respect to the track member, it is necessary to smoothly enter the rolling element from the load path to the direction change path, For this purpose, the circulation path assembly must be accurately positioned with respect to the main body member. In particular, it is necessary to position the circuit assembly with high accuracy with respect to the load rolling surface of the main body member.

  However, in the rolling guide device disclosed in Japanese Patent Laid-Open No. 2006-105296, the pipe portion of the circulation path assembly is inserted into the through hole of the main body member, thereby positioning the circulation path assembly with respect to the main body member. Since the through hole cannot function as a positioning reference for the main body member of the circulation path assembly, it is difficult to improve the positioning accuracy of the circulation path assembly with respect to the load rolling surface of the main body member. This is because the loaded rolling surface is ground after the body member is quenched, but the through hole into which the pipe portion of the circulation path assembly is inserted is considered in consideration of ease of processing. This is because the position accuracy itself of the through hole with respect to the load rolling surface itself is low due to the heat treatment distortion after quenching that occurs in the main body member and is formed before the main body member is quenched. For this reason, resistance tends to act on the circulation of the rolling elements, and there is a concern that the movement of the moving member deteriorates particularly in applications where the moving member is moved at a high speed with respect to the track member.

  The present invention has been made in view of such problems, and the object of the present invention is to facilitate smooth circulation of the rolling elements in the infinite circulation path and increase the accuracy of the movement of the moving member relative to the track member. An object of the present invention is to provide a rolling guide device that can be used.

  That is, the rolling guide device to which the present invention is applied includes a plurality of raceway members and an inner direction change path and an outer direction change path that are assembled to the track member via a large number of rolling elements. A moving member having a rolling element infinite circulation path, and the moving member includes a main body member having a load rolling surface and a return path of the rolling element, and the inner direction changing path and the outer direction changing path. And a lid that is mounted on the main body member and has an outer peripheral guide surface of the outer direction change path.

  A position reference hole serving as a position reference for the direction changing portion is formed on the end surface of the main body member, while a positioning protrusion that is press-fitted into the position reference hole is formed in the direction changing portion. The main body member is formed with a rotation stop groove parallel to the load rolling surface along the longitudinal direction, and a positioning protrusion is press-fitted into the position reference hole on the end surface of the direction changing portion facing the main body member. An anti-rotation protrusion that fits into the anti-rotation groove in a state is formed.

  According to the present invention, since the positioning protrusion formed on the direction changing portion is press-fitted into the position reference hole formed on the body member, the position accuracy of the position reference hole with respect to the load rolling surface is high. Thus, the direction changing portion in which the positioning protrusion is press-fitted into the position reference hole is mounted at an appropriate position of the main body member.

  Further, the main body member is provided with a rotation stop groove parallel to the load rolling surface, and the end face of each direction changing portion is fitted in the rotation stop groove with a positioning projection press-fitted into the position reference hole. Since the rotation stop protrusion to be joined is formed, the rotation of the direction changing portion around the positioning protrusion press-fitted into the position reference hole is locked. As a result, the direction change path provided in the direction change portion is positioned with high accuracy with respect to the load rolling surface of the main body member, and facilitates smooth circulation of the rolling elements in the infinite circulation path. It is possible to increase the accuracy of the movement of the moving member relative to.

It is a perspective view which shows an example of embodiment of the rolling guide apparatus with which this invention is applied. It is the II-II sectional view taken on the line of FIG. It is a perspective view which shows the coupling body belt which arranged the roller as a rolling element. It is a perspective view which shows the main body member of the rolling guide apparatus which concerns on embodiment. It is a perspective view which shows the circulation path assembly of the rolling guide apparatus which concerns on embodiment. It is the perspective view which observed the circulation path assembly shown in FIG. 5 from another angle. It is a disassembled perspective view of a circuit assembly. It is a perspective view which shows the state which mounted | wore the main body member with the circulation path assembly. It is the schematic which shows the procedure of assembling a pair of circulation path assembly with respect to a main body member. It is the schematic explaining the combined state of a pair of circulation path assembly with respect to a main body member. It is a perspective view which shows the cover body of the rolling guide apparatus which concerns on embodiment. It is a perspective view which shows a mode that the circulation path assembly was mounted | worn with respect to the cover body. It is the perspective view which observed the circulation path assembly shown in FIG. 8 from another angle. It is the schematic explaining the positioning structure with respect to the main body member of a circulation path assembly.

  Hereinafter, the rolling guide device of the present invention will be described in detail with reference to the accompanying drawings.

  1 and 2 show an example of an embodiment of a rolling guide device to which the present invention is applied. This rolling guide device is assembled to the track member 2 through a plurality of rollers 1 and a track member 2 formed with a rolling surface 20 of the roller 1 as a rolling element along the longitudinal direction. It is comprised from the moving member 3 which incorporated the infinite circulation path. The roller 1 rolls on the rolling surface 20 of the track member 2 while circulating in the endless circulation path, so that the moving member 3 can freely move along the longitudinal direction of the track member 2. It has become. The rolling guide device of the present invention can use a ball as the rolling element.

  The track member 2 is formed to have a substantially rectangular cross section, and concave portions are formed on both side surfaces thereof. Rolling surfaces 20 of the roller 1 are formed above and below each recess, and four rolling surfaces 20 are formed in the entire race member 2. Each rolling surface 20 is inclined at an angle of 45 ° with respect to the bottom surface 21 of the track member 2, and the rolling surface 20 located above the recess faces obliquely downward at an angle of 45 °, while The rolling surface 20 located on the side faces obliquely upward at an angle of 45 °. The track member 2 has fixing bolt mounting holes 22 formed at predetermined intervals along the longitudinal direction, and is used when the track member 2 is laid on a mechanical device or the like. In addition, the arrangement of the rolling surface 20 with respect to the track member 2, the inclination angle, and the number of the strips may be appropriately changed according to the load capacity required for the moving member 3.

  On the other hand, the moving member 3 includes a main body member 4 having a guide groove that accommodates a part of the track member 2, a pair of lids 5 that are mounted before and after the main body member 4 moves, and the main body member. 4 and a circulation path assembly 6 covered from the outside by the lid member 5. The details of the circulation path assembly 6 will be described later.

  The main body member 4 includes a horizontal portion 4a on which a mounting surface 41 such as a mechanical device is formed, and a pair of leg portions 4b orthogonal to the horizontal portion 4a, and straddles the track member 2 therebetween. Are arranged. The mounting surface 41 is formed on the horizontal portion 4a, and two load rolling surfaces 42 on which the roller 1 rolls are formed inside each leg portion 4b. The rolling surface 20 of the track member 2 and the load rolling surface 42 of the main body member 4 face each other, and a load passage 43 in which the roller 1 rolls while applying a load between the main body member 4 and the track member 2. Configure. Each leg 4b is formed with a return passage 44 corresponding to each load rolling surface 42 in parallel with the load passage 43, and the roller 1 released from the load after rolling through the load passage 43 is loaded. It rolls in the opposite direction to the inside of the passage 43. The return passage 44 is provided in the circulation path assembly 6, and a part of the circulation path assembly 6 is inserted into a through hole 45 formed in the body member 4, so On the other hand, a return passage 44 is provided.

  Further, the circulation path assembly 6, together with the lid 5, constitutes a direction changing path 60 that connects the load path 43 and the return path 44. An endless circulation path of the roller 1 is constructed inside the moving member 3 by connecting a pair of direction changing paths 60 to both ends of each load path 43 and the corresponding ends of the return path 44 corresponding thereto. As indicated by broken lines in FIG. 2, each load passage 43 is connected to a return passage 44 located obliquely downward or obliquely upward by the direction changing passage 60, and is constructed in each leg portion 4 b of the main body member 4. In the two infinite circulation paths, the direction change paths 60 intersect each other.

  As shown in FIG. 3, the rollers 1 are arranged in a row on a flexible coupling belt 10 at equal intervals, and are incorporated in the endless circulation path together with the coupling belt 10. The connecting body belt 10 is formed by injection molding of synthetic resin, and includes a plurality of spacers 11 interposed between the roller 1 and the roller 1 and a belt portion 12 that connects these spacers 11 in a row. Has been. The roller 1 may be inserted into the endless circulation path without being arranged on the connecting belt 10.

  FIG. 4 is a view showing a state in which the lid 5 and the circulation path assembly 6 are removed from the moving member 3, and the main body member 4 is cut in half by the horizontal portion 4a, and only one leg portion 4b. Is shown. As can be understood from this figure, an upper load rolling surface 42 a and a lower load rolling surface 42 b are formed on the inner surface of the leg portion 4 b of the main body member 4. The leg 4b is formed with a lower through hole 45b corresponding to the upper load rolling surface 42a and an upper through hole 45a corresponding to the lower load rolling surface 42b. A part of the circulation path assembly 6 is inserted into the hole 45a and the lower through hole 45b so that the return passage 44 is constructed.

  A female screw hole 46 for fastening a fixing bolt that penetrates the lid member 5 is formed on the end surface of the main body member 4 to which the lid member 5 is attached, and the position of the circulation path assembly 6 A reference hole 47 is formed. The position reference hole 47 is located in a region surrounded by the upper load rolling surface 42a, the lower load rolling surface 42b, the upper through hole 45a and the lower through hole 45b, and the upper load rolling surface. The position of the position reference hole 47 with respect to the surface 42a and the lower load rolling surface 42b, or the positions of the upper load rolling surface 42a and the lower load rolling surface 42b with respect to the position reference hole 47 are accurately set. ing. Further, an anti-rotation groove 48 is provided on the inner side surface of the leg portion 4b at an intermediate position between the upper load rolling surface 42a and the lower load rolling surface 42b. It intersects and is formed in a V-shaped cross section. A central holding member 9 (see FIG. 2) that guides the connecting belt 10 in the load passage 43 is formed by the rotation stop groove 48 and a rotation stop projection formed in the circulation path assembly 6 described later, so that the upper load rolling surface. Positioned with respect to 42a and the lower load rolling surface 42b.

  5 and 6 are perspective views showing the circulation path assembly 6. The circulation path assembly 6 is inserted into the through-hole 45a or 45b of the main body member 4 and the pipe passage portion 7 in which the return passage 44 is formed, and the direction changing portion 8 for constructing the direction changing passage 60. The pipe passage portion 7 and the direction changing portion 8 are integrated by synthetic resin injection molding. The total length of the pipe passage portion 7 is slightly longer than the lengths of the through holes 45 a and 45 b formed in the main body member 4. The pipe passage portion 7 and the direction changing portion 8 are not necessarily integrated, and may be formed separately and then assembled when mounted on the main body member 4.

  The direction changing section 8 has an inner direction changing path 60-1 curved in a substantially U shape therein, and the inner direction changing path 60-1 is a return path 44 formed in the pipe passage section 7. Is continuous. Further, as shown in FIG. 5, an inner peripheral side guide surface 60 a of the outer direction change path 60-2 is formed in an arch shape on the outer side surface of the direction changing portion 8. The outer direction change path 60-2 is provided so as to guide the roller 1 in a direction intersecting with the inner direction change path 60-1, and the inner circumferential guide surface 60a passes through the inner direction change path 60-1. It crosses the inner direction change path 60-1 so as to straddle it. Further, as shown in FIG. 6, an abutting recess 64 is formed on the inner side surface of the direction changing portion 8 so that the tip end surface of the pipe passage portion of the other circulation path assembly 6 abuts. One end of the side guide surface 60 a is opened to the abutting recess 64.

  Further, as shown in FIG. 6, the direction changing portion 8 is provided with a positioning protrusion 67 that fits into the position reference hole 47 of the main body member 4. The positioning projection 67 exists at a position where the inner direction change path 60-1 and the outer direction change path 60-2 intersect, and is formed in a cylindrical shape having an outer diameter slightly larger than the inner diameter of the position reference hole 47. ing.

  Further, the direction changing portion 8 is provided with a rotation stop projection 68 for positioning the direction changing portion 8 when the circulation path assembly 6 is mounted on the main body member 4. The rotation stop protrusion 68 protrudes toward the main body member 4 on the same plane as the inner surface of the circulation path assembly 6 on which the positioning protrusion 67 is formed. The tip of the rotation stop projection 68 has a V-shaped cross section with two surfaces intersecting, and the cross-sectional shape is set to be substantially the same as that of the rotation stop groove 48.

  FIG. 7 is an exploded perspective view of the circulation path assembly. The circulation path assembly 6 is divided into a first circulation half 6A and a second circulation half 6B, and the division surface includes the return passage 44 and the center line of the inner direction change path 60-1. Accordingly, rolling element guide grooves 62 that serve as the return passage 44 and the inner direction change path 60-1 are formed in the first circulation half and the second circulation half, respectively. A continuous groove is continuous from the pipe passage portion 7 to the direction changing portion 8. A guide groove 63 for receiving the belt portion 12 of the belt coupling body 10 is formed at the bottom of the rolling element guide groove 62. Furthermore, the inner peripheral side guide surface 60a of the outer direction change path 60-2 formed in an arch shape with respect to the outer side surface of the direction changing part 8 crosses the inner peripheral side guide surface 60a in the middle. It is divided into a first circulation half 6A and a second circulation half 6B.

  Each of the first circulation half 6A and the second circulation half 6B is formed with a projection 65 and a hole 66 that are fitted to each other. The second circulation half 6B is accurately combined to complete the circulation path assembly 6 including the return path 44 and the inner direction change path 60-1.

  FIG. 8 is a perspective view showing a state in which the circulation path assembly 6 is mounted on the leg portion 4b of the main body member 4. The pipe passage portion 7 of the circulation path assembly 6 is connected to the upper through hole 45a of the leg portion 4b. The inserted state is shown. The pipe passage portion 7 is formed to be slightly longer than the length of the main body member 4 in the moving direction (longitudinal direction of the track member 2), and the pipe until the direction changing portion 8 contacts the leg portion 4b. When the passage portion 7 is inserted into the through hole 45a, the tip of the pipe passage portion 7 slightly protrudes from the opposite surface of the leg portion 4b, although not shown in FIG. In this state, the inner direction change path 60-1 included in the direction change portion 8 is connected to the lower load rolling surface 42b formed in the main body member 4, and the outer direction change formed in the direction change portion 8. An inner peripheral side guide surface 60 a of the path 60-2 is connected to the upper load rolling surface 42 a of the main body member 4. FIG. 8 shows one end surface of the leg portion 4b to which the circulation path assembly is mounted, but the other circulation path assembly 6 is similarly applied to the opposite end surface of the leg portion 4b. Is installed.

  FIG. 9 and FIG. 10 are schematic views simply showing how the pair of circulation path assemblies 6-1 and 6-2 are attached to the leg portion 4b from the front and rear in the moving direction of the main body member 4. FIG. is there. As shown in FIG. 9, with respect to the upper through hole 45a and the lower through hole 45b formed in the main body member 4, the pipe passage portions 7 of the pair of circulation path assemblies 6-1 and 6-2 from different directions. Is inserted. Here, the circulation path assembly 6-1 inserted into the upper through hole 45a and the circulation path assembly 6-2 inserted into the lower through hole 45b are members of the same shape, but are inserted into the leg portion 4b. The directions are opposite to each other, and the circuit assembly 6-2 is upside down with the circuit assembly 6-1. FIG. 10 is a schematic view showing a state in which the pair of circulation path forming members 6-1 and 6-2 have been attached to the leg portion 4b. In a state where the circulation path forming members 6-1 and 6-2 have been attached to the skirt portions, the ends of the pipe passage portions 7 of the circulation path forming members 6-1 and 6-2 are located at the upper through hole 45a or the lower side. It protrudes slightly from the said leg part 4b through the side through-hole 45b, and contact | abuts to the abutting recessed part 64 of the direction change part 8 located facing each other. Accordingly, the pair of circulation path assemblies 6-1 and 6-2 are combined with the leg portion 4b interposed therebetween. Further, since the main body member 4 includes a pair of legs 4b, four circulation path assemblies are attached to the main body member 4.

  FIG. 11 is a perspective view showing a lid 5 that covers the direction changing portion 8 of the circulation path assembly 6 and that is attached to the main body member 4. The lid 5 is observed from the main body member 4 side. It is. The lid body 5 is manufactured by injection molding of synthetic resin, has a mounting portion 5a corresponding to the horizontal portion 4a of the main body member 4, and a pair of leg portions 5b corresponding to the leg portions 4b of the main body member 4. , 5c. Receiving grooves 50 and 51 for receiving the direction changing portions 8 of the circulation path assembly 6 are formed on the inner side surfaces of the leg portions 5b and 5c that come into contact with the main body member 4, respectively. Here, the accommodation groove 50 formed in the leg portion 5b corresponds to the circulation path assembly 6 attached to the main body member 4 in FIG. The receiving groove 51 formed in the leg 5c is formed in a direction different from the receiving groove 50 formed in the leg 5b by 180 °, and is opposite to the leg 4b of the main body member 4 in FIG. It corresponds to the circulation path assembly mounted from the side (the back side of the paper).

  Further, outer peripheral side guide surfaces 60b and 60c corresponding to the inner peripheral side guide surface 60a of the circulation path assembly 6 are formed in a concave curved surface on the inner side surfaces of the leg portions 5b and 5c, and the outer peripheral side guide The surfaces 60b and 60c are provided so as to intersect the receiving grooves 50 and 51 at the leg portions 5b and 5c. However, the outer peripheral guide surface 60c formed on the leg portion 5c is formed in a direction different from the outer peripheral guide surface 60b formed on the leg portion 5b by 180 °.

  The leg portions 5b and 5c of the lid body 5 are respectively formed with positioning recesses 52 with which the front end surfaces of the pipe passage portions 7 of the circulation path assembly 6 abut, and one ends of the outer peripheral side guide surfaces 60b and 60c. Are open to these positioning recesses 52. Further, step portions 53 are formed on both sides of the outer peripheral guide surfaces 60b and 60c along the longitudinal direction of the outer peripheral guide surfaces 60b and 60c. When the direction changing portion 8 of the three-dimensional body 6 is accommodated, the stepped portion 53 constitutes a guide groove that accommodates the belt portion 12 of the connector belt 10. In addition, the code | symbol 54 in FIG. 11 is a through-hole of the fixing bolt for fastening the said cover body 5 to the said main body member 4. FIG.

  FIG. 12 is a perspective view showing a combined state of the circulation path assembly 6-1 and the lid 5 shown in FIG. 9, and the circulation path assembly 6-1 with respect to one receiving groove 50 of the lid. The direction change part 8 of this is shown. When the direction changing portion 8 is received in the receiving groove 50 of the lid body 5 in this way, the outer circumferential side guide surface 60b of the lid body 5 and the inner circumferential side guide surface 60a of the direction changing portion 8 face each other, and The outer direction change path 60-2 is completed. At this time, the pipe passage portion 7 provided in the circulation path assembly 6-1 is inserted into the upper through hole 45a formed in the leg portion 4b of the main body member 4. Further, when the direction changing portion 8 is accommodated in the receiving groove 50 of the lid body 5, the abutting concave portion 64 formed in the direction changing portion 8 and the positioning concave portion 52 formed in the lid body 5 are combined and substantially A circular pipe receiving hole 55 is formed. For the pipe housing hole 55, the tip of the pipe passage portion 7 of the other circulation path assembly 6-2 protruding from the lower through hole 45 formed in the leg portion 4b of the main body member 4 is an arrow in the figure. It is designed to be fitted from the line direction. Thereby, the said outside direction change path 60-2 is connected with the return path 44 of the other circulation path assembly 6-2.

  Further, the direction changing portion 8 of the circulation path assembly 6 is accommodated in the other accommodation groove 51 of the lid body, and the circulation path assembly accommodated in the accommodation groove 51 is the accommodation groove 50 described above. The circuit assembly housed in the top and bottom is upside down. The pair of lids 5 attached to the main body member 4 from both sides in the moving direction are obtained by arranging the lids shown in FIG. 11 so as to face each other, and have the same shape.

  Then, the moving member 3 is completed by combining the four circulation path assemblies 6 having the same shape and the two lid bodies 5 having the same shape with respect to the main body member 4 in this manner. Two infinite circulation paths of the roller 1 are formed for each leg 4b. That is, the inner direction change path 60-1 and the outer direction change path 60-2 are respectively located at both ends of the upper load rolling surface 42a and the lower load rolling surface 42b of each leg 4b. The path 60-1 and the outer direction change path 60-2 are connected by the return path 44 in the upper through hole 45 a or the lower through hole 45 b of the main body member 4.

  Thus, in constructing an infinite circulation path of the roller 1 by combining the main body member 4, the circulation path assembly 6 and the lid body 5, in order to ensure smooth circulation of the roller 1 in the infinite circulation path, It is important that the inlets of the inner direction change path 60-1 and the outer direction change path 60-2 are accurately positioned with respect to the load rolling surfaces 42a and 42b formed on the main body member. In particular, in the rolling guide device of this embodiment, the positioning of the direction changing portion 8 constituting the circulation path assembly 6 with respect to the main body member 4 is important.

  For this reason, in the rolling guide device according to the present embodiment, when the circulation path assembly 6 is mounted on the main body member 4, the positioning projections 67 provided on the direction changing portion 8 are the leg portions 4 b of the main body member 4. Is fitted into a position reference hole 47 formed in Since the outer diameter of the positioning protrusion 67 is slightly larger than the inner diameter of the position reference hole 47 as described above, the positioning protrusion 67 is press-fitted into the position reference hole 47. The protrusion 67 is prevented from being displaced inside the position reference hole 47.

  As described above, the positioning protrusion 67 provided in the direction changing portion 8 is fitted into the position reference hole 47 so that the direction changing portion 8 is accurately positioned with respect to the main body member 4. As described above, the position of the position reference hole 47 with respect to the upper load rolling surface 42a and the lower load rolling surface 42b, or the upper load rolling surface 42a and the lower load rolling surface with respect to the position reference hole 47. It is important that the position of the running surface 42b is set accurately.

  As processing methods for the position reference hole 47, the upper load rolling surface 42a, and the lower load rolling surface 42b, the following means can be considered. That is, the reference surface 49 (see FIGS. 1 and 2) is formed on the side surface of the leg portion 4b of the main body member 4, and the mounting surface 41 is formed on the horizontal portion 4a. As a processing reference, the position reference hole 47 is drilled, and the upper load rolling surface 42a and the lower load rolling surface 42b are ground. Thus, by forming the position reference hole 47, the upper load rolling surface 42a, and the lower load rolling surface 42b using the same processing standard, the upper load rolling surface 42a and the lower load rolling surface 42b. The position accuracy of the position reference hole 47 with respect to or the position accuracy of the upper load rolling surface 42a and the lower load rolling surface 42b with respect to the position reference hole 47 can be made high.

  Thus, in the processing of the position reference hole 47, the upper load rolling surface 42a, and the lower load rolling surface 42b, the position reference hole 47, the upper load rolling surface 42a, and the lower load rolling surface 42b. For the means for providing a machining reference different from 42b, first, the position reference hole 47 is formed in the main body member 4, and the upper load rolling surface 42a and the lower surface are formed using the position reference hole 47 as a processing reference. A means of grinding the side load rolling surface 42b is also conceivable. As described above, the position reference hole 47 with respect to the position reference hole 47 or the position accuracy of the position reference hole 47 with respect to the upper load rolling surface 42 b or the upper position with respect to the position reference hole 47 can be obtained by means using the position reference hole 47 as a processing reference. The positional accuracy of the load rolling surface 42a and the lower load rolling surface 42b can be high.

  Here, when performing the quenching process on the main body member 4, the quenching process causes the reference surface 49 and the mounting surface 41 in the former processing method, and the position reference in the latter processing method. In such a case, it is preferable to form these processing standards after performing a quenching process on the main body member 4 because the holes 47 may be distorted. However, in the latter processing method using the position reference hole 47 as a processing reference, when using a heat treatment method with small thermal deformation, for example, induction hardening, the position reference hole 47 is processed before the quenching process. There is no problem.

  On the other hand, when the positioning protrusion 67 of the direction changing portion 8 is press-fitted into the position reference hole 47, the direction changing portion 8 has a degree of freedom of rotation around the position reference hole 47. become. However, in the rolling guide device of the present embodiment, when the lid body 5 is attached to the main body member 4, the direction changing portion 8 of the circulation path assembly 6 is accommodated in the accommodation grooves 50 and 51 of the lid body 5, As shown in FIG. 13, the rotation stop protrusion 68 provided on the direction changing portion 8 is fitted in the rotation stop groove 48 of the main body member 4 without a gap, and the circulation path assembly 6 around the position reference hole 47 is formed. Lock the rotation. In this case, since the center holding member 9 is positioned in the main body member 4 by using the rotation stop groove 48 as described above, a pair of circulation path assemblies 6-1 are sandwiched between the leg portions 4b. In the combined state of 6-2, the pair of rotation stop projections 68 formed on the circulation path assemblies 6-1 and 6-2 are positioned on the rotation stop groove 48 so as to sandwich the center holding member 9. It has become so.

  FIG. 14 is a schematic view showing the positional relationship between the rotation stop protrusion 68 and the rotation stop groove 48 around the positioning protrusion 67. As described above, since the direction changing portion 8 can rotate around the positioning protrusion 67 press-fitted into the position reference hole 47 of the main body member 4, the rotation stopping protrusion erected on the direction changing portion 8. 68 is movable around the positioning projection 67 in an arc shape in the direction of the arrow.

  However, as described above, the anti-rotation groove 48 formed in the main body member 4 is formed in a V-shaped cross section with two surfaces intersecting, and further fixes the circulation path assembly 6 to the main body member 4. As a result, the rotation stop projection 68 is fitted into the rotation stop groove 48 without a gap. According to such a configuration, the two surfaces constituting the rotation stop projection 68 come into contact with the two surfaces forming the rotation stop groove 48, and the rotation of the circulation path assembly 6 with respect to the main body member 4 is locked. It becomes possible to do. As a result, the positional accuracy of the circulation path assembly 6 with respect to the main body member 4 can be ensured.

  Further, in the rolling guide device according to the present embodiment, the apex P of the rotation stop groove 48 where the two surfaces intersect and the center Q of the position reference hole 47 are arranged on the same line (one-dot chain line in FIG. 14). That is, the center Q of the position reference hole 47 coincides with the bisector of the rotation stop groove 48. In other words, the center of the positioning protrusion 67 press-fitted into the position reference hole 47 also coincides with the bisector of the rotation stop groove 48, and the rotation stop protrusion that fits the center of the positioning protrusion 67 and the rotation stop groove 48. 68 vertices are arranged on the same line. For this reason, even if the circulation path assembly 6 moves in the vertical direction of the arrow line around the positioning projection 67, the rotation stop groove 48 formed in a V-shaped cross section where two surfaces intersect is the same. Since the rotation stop projection 68 formed in a V-shaped cross section where the two surfaces intersect with each other is fitted without a gap, the rotation of the circulation path assembly 6 can be more reliably locked. The positional accuracy of the circulation path assembly 6 with respect to the main body member 4 can be ensured.

  In addition, the direction changing portion 8 is configured so that the fitting between the direction changing portion 8 and the receiving grooves 50 and 51 formed in the lid 5 does not affect the positioning of the circulation path assembly 6. The housing grooves 50 and 51 are configured to be loosely fitted.

  Furthermore, both the positioning projection 67 and the rotation stop projection 68 provided on the circulation path assembly 6 are provided on the first circulation half 6A constituting the circulation path assembly 6, and the second circulation half It is not provided in 6B. Therefore, regarding the positioning of the circulation path assembly 6 with respect to the main body member 4 using the positioning protrusions 67 and the rotation stop protrusions 68, only the first circulation half 6A is actually relative to the main body member 4. The second circulation half 6B is positioned with high accuracy, and is only assembled to the first circulation half 6A positioned on the body member 4 and positioned with high accuracy. That is, the assembly error between the first circulation half 6A and the second circulation half 6B does not affect the positioning of the circulation path assembly 6 with respect to the main body member 4, and the circulation path assembly 6 also in this respect. Can be accurately positioned with respect to the upper load rolling surface 42a and the lower load rolling surface 42b of the main body member 4.

  Furthermore, in the rolling guide device of this embodiment, the insertion of the pipe passage portion 7 of the circulation path assembly 6 into the upper through hole 45a or the lower through hole 45b of the main body member 4 positions the circulation path assembly 6. The inner diameters of the upper through hole 45a and the lower through hole 45b are formed larger than the outer diameter of the pipe passage portion 7 so as not to affect the above. That is, the presence of the pipe passage portion 7 does not hinder the positioning of the circulation path assembly 6 with respect to the main body member 4 using the positioning protrusion 67 and the rotation stop protrusion 68. Since the pipe passage portion 7 inserted into the through holes 45 a and 45 b of the main body member 4 is fitted to the direction changing portion 8 of the circulation path assembly 6 attached from the opposite side to the main body member 4. In other words, the pipe passage portion 7 is supported by a pair of direction changing portions 8 whose longitudinal ends are accurately positioned with respect to the main body member 4, thereby the infinite circulation path of the roller 1. Can be formed with high accuracy and smooth circulation of the roller 1 can be achieved.

  DESCRIPTION OF SYMBOLS 1 ... Roller (rolling body), 2 ... Track member, 3 ... Moving member, 4 ... Main body member, 5 ... Cover body, 6 ... Circulation path assembly, 7 ... Pipe passage part, 8 ... Direction change part, 47 ... Position Reference hole 48 ... rotation stop groove 60-1 ... inner direction change path 60-2 ... outer direction change path 67 ... positioning projection 68 ... rotation stop projection

Claims (4)

A track member, and a moving member having a plurality of rolling element infinite circulation paths assembled to the track member via a plurality of rolling elements and configured to include an inner direction change path and an outer direction change path intersecting each other. In the rolling guide device provided,
The moving member includes a main body member having a load rolling surface and a return passage of the rolling element, a direction changing portion having the inner direction changing path and an inner peripheral side guide surface of the outer direction changing path, and A lid body mounted on the main body member and having an outer peripheral side guide surface of the outer direction change path,
A position reference hole serving as a position reference for the direction changing portion is formed on the end surface of the body member, while a positioning protrusion that is press-fitted into the position reference hole is formed in the direction changing portion.
The main body member is formed with a rotation stop groove parallel to the load rolling surface along the longitudinal direction, and a positioning projection is press-fitted into the position reference hole on the end surface of the direction changing portion facing the main body member. The rolling guide device is characterized in that a rotation stop projection that fits into the rotation stop groove is formed. The rotation stop groove formed in the main body member has two surfaces intersecting each other,
The rolling guide device according to claim 1, wherein the rotation stop protrusion abuts against two surfaces of the rotation stop groove in a state where the positioning protrusion is fitted in the position reference hole. The rolling guide device according to claim 2, wherein the center of the position reference hole formed in the main body member is disposed on a bisector of the rotation stop groove. The direction changing portion includes a first circulation half and a second circulation half that are divided in a plane including the inner direction change path, and the positioning protrusion and the rotation stop protrusion are formed in the first circulation half. The rolling guide device according to claim 3, wherein

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