JP2017211015A - Rolling guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling guide device which secures the smooth circulation of rolling bodies without making a clogging phenomenon occur in a non-load passage due to the reception of large frictional resistance by the rolling bodies even if the rolling bodies are aligned without intervals in the passage, and can perform a smooth motion of a moving member with respect to a raceway member.SOLUTION: A rolling guide device includes a raceway member and a moving member which is assembled to the raceway member via a large number of rolling bodies, and has an infinite circulation path including a return passage and a direction conversion passage of the rolling bodies. The moving member includes a non-load passage member having the return passage and the direction conversion passage, and in the non-load passage member, an elastic deformation region which is deformed by pressure from the rolling bodies forms a part of an inner wall of the return passage and/or the direction conversion passage, and is arranged along a longitudinal direction of the inner wall.SELECTED DRAWING: Figure 8

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 Patent Document 1, the moving member includes a metal main body member, a plurality of circulation path assemblies attached to the main body member, and the circulation path assemblies so as to cover the circulation path assemblies. 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, and the direction changing portion has a built-in direction changing passage connecting the return passage and the load passage. The lid is configured to cover a direction changing portion of the circulation path assembly, and the circulation path assembly attaches the pipe portion to the through hole of the body member by attaching the lid to the body member. The infinite circulation path of the rolling element is completed by being restrained by the main body member in a state of being inserted into the body.

  The infinite circulation path of the rolling element includes a load path in which the rolling element rolls while applying a load between the race member and the moving member, and a return path of the rolling element provided in parallel with the load path, It is comprised from a pair of direction change path which connects the edge parts of the said load path and the said return path, and each direction change path is formed in a substantially semicircle shape in order to change the rolling direction of a rolling element 180 degrees. Has been. The return passage and the direction change passage are configured as unloaded passages that roll in a state where the rolling elements are released from the load, and the widths of these passages are formed larger than the diameter of the rolling elements.

  For this reason, when the moving member moves along the track member, the rolling element in the load passage moves while rotating in the load passage, but when the rolling member is discharged from the load passage to the direction change path, It does not rotate by itself and moves inside the direction change path and the return path while being pushed by the subsequent rolling elements continuously discharged from the load path. That is, in the no-load passage constituted by the return passage and a pair of direction change passages located at both ends thereof, the rolling elements are arranged without gaps along the circulation direction.

  At this time, since the discharge of the rolling elements from the load passage to the no-load passage and the entry of the rolling elements from the no-load passage to the load passage are not completely synchronized, the length of the rolling element row in the no-load passage Periodically repeats minute changes. When the spacers are arranged between the rolling elements, it is possible to absorb this periodic length change by elastically deforming the spacers, but no spacers are used and no load is applied. When the rolling elements are arranged without gaps in the passage, there is a concern that the rolling elements receive a large frictional resistance to cause a clogging phenomenon in the passage, and the smooth circulation of the rolling elements is hindered. Moreover, such a clogging phenomenon was remarkable when a roller was used as the rolling element.

JP 2013-190021 A

  The present invention has been made in view of such a problem, and the object of the present invention is to provide a large frictional resistance to the rolling elements even when the rolling elements are arranged without gaps in the no-load passage. It is an object of the present invention to provide a rolling guide device that does not cause a clogging phenomenon in the passage, ensures smooth circulation of the rolling elements, and can achieve smooth movement of the moving member with respect to the track member. .

  That is, the present invention includes a raceway member having a rolling surface of a rolling element along the longitudinal direction, and is assembled to the raceway member via a number of rolling elements, and includes a return path and a direction change path of the rolling element. A rolling guide device including a moving member having an infinite circulation path, wherein the moving member covers a main body member, a plurality of circulation path forming members attached to the main body member, and the circulation path forming members. Thus, a pair of lids attached to the main body member is included. Further, the circulation path forming member is a combination of a first circulation half and a second circulation half, has the return passage and has a pipe portion inserted into the through hole of the main body member, and the direction change path. And a direction changing portion provided at one end of the pipe portion and disposed on an end surface in the moving direction of the main body member. An elastically deformable portion that is appropriately deformed by being pressed by a rolling element in the return passage is provided at the center in the longitudinal direction of the pipe portion of the circulation path forming member, while the elastic portion is provided at both ends in the longitudinal direction of the pipe portion. A pair of cylindrical fixing portions are formed across the deformation portion, and the direction changing portion and the pair of fixing portions are a plane including a center line of the direction changing path, and the first circulation half and the second circulation On the other hand, the elastic deformation portion is divided into the first circulation half and the second circulation half on a plane perpendicular to the plane including the center line of the direction change path.

  According to the present invention, the circulation path forming member having the return path and the direction change path of the rolling element is divided into the first circulation half and the second circulation half, and the circulation path formation is performed. It is possible to ensure smooth circulation of the rolling elements while minimizing the number of parts constituting the member. Further, even if the rolling elements arranged in the endless circulation path are subjected to a large frictional resistance due to a minute change in the length of the rolling element row in the endless circulation path, the elastic deformation portion does not rotate in the return path. Since it is pressed and deformed by the moving body and the passage width of the return passage is expanded, it is possible to prevent the occurrence of clogging in the infinite circulation path, and to ensure smooth circulation of the rolling body, thereby Smooth movement of the moving member can be achieved.

  In order to facilitate the formation of the direction change path with respect to the circulation path forming member and to effectively prevent the occurrence of the clogging phenomenon of the rolling elements in the return path, the direction change part and the pair of fixing parts are A plane including the center line of the direction change path is divided into the first circulation half and the second circulation half, but the elastic deformation portion is a plane orthogonal to the plane including the center line of the direction change path. The elastic body is divided into the first circulation half and the second circulation half, and the elastic deformation portion is provided for the circulation path forming member only by a combination of the first circulation half and the second circulation half. It becomes possible to make it.

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 main body member of the rolling guide apparatus which concerns on embodiment. It is a perspective view which shows the circulation path formation member of the rolling guide apparatus which concerns on embodiment. It is a perspective view which shows the state which mounted | wore the circulation path formation member with respect to the main body member. It is the disassembled perspective view which observed the circulation path formation member shown in FIG. 4 from the 1st half body side. It is the disassembled perspective view which observed the circulation path formation member shown in FIG. 4 from the 2nd half body side. It is sectional drawing which shows the arrangement | sequence state of the rolling elements in a pipe part. It is the schematic explaining the effect | action of the elastic deformation area | region in a pipe part.

  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 in a rectangular cross section, and two rolling surfaces 20 of the roller 1 are formed on both side surfaces thereof, and four rolling surfaces 20 are formed in the entire track member 2. Has been. 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 forming member 6 covered from the outside by the lid 5. The details of the circulation path forming member 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. In each leg 4b, a return passage 44 of the roller 1 corresponding to each load rolling surface 42 is formed in parallel with the load passage 43. The return passage 44 is provided in the circulation path forming member 6, and a part of the circulation path forming member 6 is inserted into the through hole 45 formed in the main body member 4, so On the other hand, a return passage 44 is provided.

  Further, the circulation path forming member 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.

  FIG. 3 is a view showing a state in which the lid body 5 and the circulation path forming member 6 are removed from the main body member 4, 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 forming member 6 is inserted into the hole 45a and the lower through hole 45b so that the return path 44 is constructed.

  A female screw hole 46 for fastening a fixing bolt that penetrates the lid 5 is formed on the end surface of the main body member 4 to which the lid 5 is attached. Further, a locking groove 48 having a V-shaped cross section 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. 2, the central holding member 9 (see FIG. 2) for guiding the rolling element 1 is positioned with respect to the upper load rolling surface 42 a and the lower load rolling surface 42 b using the locking groove 48. It has become.

  FIG. 4 is a perspective view showing the circulation path forming member 6. The circulation path forming member 6 is inserted into the through hole 45a or 45b of the main body member 4 and the return path pipe 7 in which the return path 44 is formed, and the direction changing portion 8 for constructing the direction changing path 60. The return passage pipe 7 and the direction changing portion 8 are integrated by synthetic resin injection molding. The entire length of the return passage pipe 7 is slightly longer than the lengths of the through holes 45 a and 45 b formed in the main body member 4. The return passage pipe 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 portion 8 incorporates an inner direction changing path curved in a substantially U shape therein, and this inner direction changing path is continuous with a return passage 44 formed in the return passage pipe 7. Further, as shown in FIG. 4, an inner peripheral side guide surface 60 a of the outer direction change path is formed in an arch shape on the outer side surface of the direction changing portion 8. The outer direction change path is provided so as to guide the roller 1 in a direction crossing the inner direction change path, and the inner peripheral side guide surface 60a extends across the outer wall portion of the direction change portion 8 It intersects the turnaround road. Further, in order to position the circulation path forming member 6 with respect to the main body member 4, the circulation path forming member 6 is provided with positioning protrusions, and the positioning protrusions 66 are formed on the leg portions 4 b of the main body member 4. It fits into the formed position reference hole 47 (see FIG. 3).

  FIG. 5 is a perspective view showing a state in which the circulation path forming member 6 is mounted on the leg portion 4b of the main body member 4, and the return passage pipe 7 of the circulation path forming member 6 is connected to the upper through hole 45a of the leg portion 4b. The inserted state is shown. The return passage pipe 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), and the return passage until the direction changing portion 8 contacts the leg portion 4b. When the pipe 7 is inserted into the through hole 45a, although not shown in FIG. 5, the tip of the return passage pipe 7 slightly protrudes from the opposite surface of the leg portion 4b. In this state, the inner direction change path built in the direction change part 8 is connected to the lower load rolling surface 42 b formed in the main body member 4, and the outer direction change path formed in the direction change part 8. The inner peripheral side guide surface 60 a is connected to the upper load rolling surface 42 a of the main body member 4. FIG. 5 shows one end face of the leg portion 4b to which the circulation path forming member 6 is attached. The end face on the opposite side of the leg portion 4b is formed in the lower through hole 45b of the leg portion. On the other hand, the return passage pipe 7 of the circulation path forming member 6 is inserted. Accordingly, a pair of circulation path forming members 6 are combined with the leg portion 4b interposed therebetween, and the main body member 4 includes a pair of leg portions. The circulation path forming member 6 is mounted.

  On the other hand, the lid body 5 (see FIG. 1) is manufactured by injection molding of synthetic resin, and is fastened to the main body member 4 with fixing bolts so as to cover the direction changing portion 8 of the circulation path forming member 6. The An outer peripheral guide surface corresponding to the inner peripheral guide surface 60a of the circulation path forming member 6 is formed in a concave curved surface on the inner surface of the lid 5, that is, the surface facing the main body member 4. When the lid is attached to the main body member, the outer peripheral side guide surface of the lid 5 and the inner peripheral side guide surface 60a of the direction changing portion 8 face each other, and the outer direction change path is completed.

  Then, the moving member 3 is completed by combining the four circulation path forming members 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.

  As shown in FIG. 4, in the pipe portion 7 of the circulation path forming member 6, a tip fixing portion 7a inserted into the through hole 45 of the main body member 4 is formed in a cylindrical shape, and the outer diameter thereof is The inner diameter of the through hole 45 has a predetermined tolerance. The pipe portion 7 is also formed in a similar cylindrical shape with a base end fixing portion 7b connected to the direction changing portion 8. Accordingly, the pipe portion 7 is held in the through hole 45 of the main body member 4.

  On the other hand, an elastic deformation portion 7c is provided between the distal end fixing portion 7a and the proximal end fixing portion 7b. As shown in FIG. 6, the elastic deformation portion 7 c includes a support beam portion 71 having a passage groove 70 of the roller 1 that rolls in an unloaded state, and a plate-like plate that blocks the passage groove 70 of the support beam portion 71. Part 72. By the plate portion 72 covering the passage groove 70 provided in the support beam portion 71, the return passage 44 of the roller 1 is constructed with respect to the elastic deformation portion 7c. Both ends in the longitudinal direction of the support beam portion 71 are held by the distal end fixing portion 7a and the base end fixing portion 7b, and the depth of the passage groove 70 formed in the support beam portion 71 is larger than the diameter of the roller 1. When the plate portion 72 covers the passage groove 70, the roller 1 rolls in the return passage 44 in a no-load state. The plate portion 72 is not joined to the support beam portion 71, and only both ends in the longitudinal direction are held by the distal end fixing portion 7 a and the proximal end fixing portion 7 b of the pipe portion 7. Therefore, when the plate portion 72 is pressed outwardly from the inside of the passage groove 70, the plate portion 72 is bent along the longitudinal direction of the pipe member 7, and the return passage 44 is expanded correspondingly.

  6 and 7 show exploded perspective views of the circulation path forming member 6. The circulation path forming member 6 is divided into a first circulation half 6A and a second circulation half 6B. By combining the first circulation half 6A and the second circulation half 6B, the circulation path forming member 6 6, the return passage 44 is provided inside the pipe portion 6, and an inner direction change path 61 is provided inside the direction changing portion 8. The circulation path forming member 6 is a plane including the center line of the inner direction change path 61 in the direction changing portion 8, the distal end fixing portion 7 a and the proximal end fixing portion 7 b of the pipe portion 7. The body 6A and the second circulation half 6B are divided, and the first circulation half 6A and the second circulation half 6B are formed in a substantially plane shape at these portions.

  On the other hand, the elastic deformation portion 7c of the pipe portion 7 is a plane orthogonal to the plane including the center line of the inner direction change path 61, that is, a plane orthogonal to the dividing surface of the direction change portion 8, and the first circulation. It is divided into a half body 6A and the second circulation half body 6B. The plate portion 72 is formed in the first circulation half 6A, and the support beam portion 71 is formed in the second circulation half 6B. Therefore, in the first circulation half 6A, the distal end fixing portion 7a and the proximal end fixing portion 7b are connected by the plate portion 72, and in the second circulation half 6B, the distal end fixing portion 7a and the proximal end fixing portion. 7 b are connected by the support beam portion 71.

  FIG. 8 shows the elastic deformation portion 7 c inside the through hole 45 of the main body member 4. When the roller 1 circulates in the endless circulation path, the roller 1 itself does not rotate and move in the unloaded path of the roller 1 composed of the direction change path 60 and the pair of return paths 44. It rolls while being pushed by the succeeding roller 1 discharged from the load passage 43 continuously. For this reason, when the rollers 1 are arranged in an infinite circulation path, the rollers 1 are pressed against each other in the no-load passage and are arranged in a staggered manner, and the clogging phenomenon of the rollers 1 occurs. there's a possibility that.

  In this regard, only the both ends of the plate portion 72 in the longitudinal direction are held by the distal end fixing portion 7 a and the proximal end fixing portion 7 b of the pipe portion 7, and the plate portion 72 and the through hole 45 of the main body member 4. Since there is a gap between the inner peripheral surface of the plate portion 72, the plate portion 72 is easily deformed in the vicinity of the central portion in the longitudinal direction, and when the plate portion 72 is deformed, the return passage 44 according to the amount of deformation. The passage width is expanded. For this reason, as shown in FIG. 9, when the rollers 1 rolling in the return passage 44 are strongly pressed against each other, and these rollers 1 are arranged in a staggered manner in the return passage 44, the rollers 1 A pressing force is applied to the plate portion 72, and as a result, the plate portion 72 is elastically deformed. As a result, the passage width of the return passage 44 is expanded, the frictional resistance between the rollers 1 is relaxed, and the clogging phenomenon of the roller 1 in the return passage 44 can be prevented.

  As described above, in the rolling guide device to which the present invention is applied, when the rollers 1 are arranged without gaps in the endless circulation path, the rollers 1 enter and exit the load passage 43, The roller does not receive a large frictional resistance and does not cause a clogging phenomenon in the return passage 44, and can ensure a smooth circulation of the roller 1 and thereby achieve a smooth movement of the moving member 3 with respect to the track rail 2. It is.

  In addition, the circulation path forming member 6 has an angle of 90 degrees between the first circulation half 6A and the second circulation half 6B at the elastic deformation portion 7c of the pipe portion 7 and other portions. Since they are different, it is possible to effectively prevent the occurrence of clogging of the rolling elements in the return passage while facilitating the formation of the direction change passage with respect to the circulation passage forming member.

  In the above-described embodiment, the present invention is applied to a rolling guide device using a roller as a rolling element. However, the present invention is also applicable to a rolling guide device using a ball as a rolling element.

DESCRIPTION OF SYMBOLS 1 ... Roller (rolling body), 2 ... Track member, 3 ... Moving member, 4 ... Main body member, 5 ... Cover body, 6 ... Circulation path formation member, 6A ... First circulation half, 6B ... Second circulation half , 7 ... Pipe portion, 8 ... Direction changing portion, 70c ... Elastic deformation portion, 71 ... Support beam portion, 72 ... Plate portion

Claims (2)

A raceway member having a rolling surface of a rolling element along the longitudinal direction, and an infinite circulation path that is assembled to the raceway member via a number of rolling elements and includes a return path and a direction change path of the rolling element. A moving member,
The moving member includes a main body member, a plurality of circulation path forming members attached to the main body member, and a pair of lid bodies attached to the main body member so as to cover the circulation path forming members,
The circulation path forming member is a combination of a first circulation half and a second circulation half, and has the return passage and a pipe portion inserted into the through hole of the main body member, and the direction changing path and A direction changing portion provided at one end of the pipe portion and disposed on an end surface in the moving direction of the main body member,
At the center in the longitudinal direction of the pipe portion of the circulation path forming member, there are provided elastic deformation portions that are appropriately deformed by being pressed by the rolling elements in the return passage, while the elastic deformation portions are provided at both ends in the longitudinal direction of the pipe portion. A pair of cylindrical fixing parts are formed across the
The direction changing portion and the pair of fixed portions are divided into the first circulation half and the second circulation half on a plane including a center line of the direction change path, while the elastic deformation portion is the direction change. A rolling guide device, wherein the rolling guide device is divided into a first circulation half and a second circulation half along a plane perpendicular to a plane including a center line of the road. The elastically deforming portion includes a support beam portion formed in the second circulation half having a passage groove deeper than the diameter of the rolling element, and covering the passage groove of the support beam portion and the support beam portion. A flexible plate portion that is detachable from the first circulation half and provided in the first circulation half,
The rolling guide device according to claim 1, wherein a gap that allows elastic deformation of the plate portion is provided between the plate portion and the inner peripheral surface of the through hole of the main body member.

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