JPH061842U - Direct acting guide device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent lubricant from leaking to the outside. [Structure] A moving body that moves along a guide rail includes a moving block having an annular ball circulation path and a plurality of balls enclosed in the ball circulation path. The moving block is formed by the end cap portions 8 at both ends and the remaining middle portion. The ball circulation path is composed of an outward path, a return path, and a reversal path connecting the ends of the outward path and the return path. A leak preventing groove 35 having both ends communicating with the ball circulation path is formed in a portion closer to the outer circumference than the lubricating oil supply groove 33 on the surface of the end cap portion 8 of the moving block facing in the front-rear direction.
The grease overflowing from the grease supply groove 33 enters the leakage preventing groove 35 and is sent to the ball circulation path through the groove 35.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a direct-acting guide device, and more particularly to a direct-acting guide device including a linear guide rail and a moving body that moves along the guide rail.

[0002]

[Prior art]

 In this type of direct-acting guide device, the movable body has two upper and lower annular ball circulation paths in the leg-shaped portions on both sides, and the cross-section across the guide rail is substantially inverted U-shaped. Of the moving block and a plurality of balls that circulate in each ball circulation path of the moving block and roll between the guide rails.The moving block consists of end cap parts at both ends and the remaining middle part. Become. The ball circulation path consists of a groove-shaped outward path formed on the guide rail sides of the leg-shaped parts on both sides of the middle part of the moving block so as to face the guide rail using a cage, and the outward path of these leg-shaped parts. A hole-shaped return path formed on the outside and guide members integrally formed at both ends of the intermediate part of the moving block are fitted to the end cap parts at both ends to connect the forward path end and the return path end. And the reversal path.

By the way, in such a direct-acting type guide device, it is necessary to supply lubricating oil consisting of grease, for example, to each ball circulation path.

Conventionally, a grease nipple mounting hole extending in the front-rear direction is penetratingly formed in the end cap portion of the moving block, and one end of the grease nipple mounting hole is formed on the inner surface of the end cap portion in the front-rear direction. A grease supply groove is formed in which the other end communicates with the reverse path of the upper ball circulation path, and the reverse paths of both ball circulation paths are formed on the outer surface in the front-rear direction in the middle part of the moving block. A communicating groove is formed to communicate with each other, and the grease injected from the grease nipple installed in the grease nipple mounting hole is supplied to the upper ball circulation path through the grease nipple mounting hole and the grease supply groove. And is supplied to the ball circulation path in the lower stage through the above (Japanese Patent Application Laid-Open No. 4-153554). No.).

[0005]

[Problems to be solved by the device]

 However, with the conventional direct-acting guide device, when the grease injected from the grease nipple is supplied to the upper ball circulation path through the grease nipple mounting hole and the grease supply groove, the grease overflows from the grease supply groove. As a result, there is a problem that it leaks to the outside from the boundary between the end cap portion and the intermediate portion.

An object of the present invention is to provide a direct-acting guide device that solves the above problems.

[0007]

[Means for Solving the Problems]

 The linear guide device according to the present invention comprises a linear guide rail and a moving body that moves along the guide rail. The moving body has a moving block having an annular ball circulation path, and a ball circulation path of the moving block. The moving block is composed of a plurality of balls that circulate between the guide rail and the guide rail, and the moving block is formed by the end cap portions at both ends and the remaining intermediate portion. On the guide rail side of each of the guide rails using a cage to face the guide rails, a hole-like return path formed on the outside of these forward paths, and at both ends of the intermediate part of the moving block. It consists of a guide member formed integrally with the end caps at both ends, and is composed of an inversion path that connects the forward path end and the return path end. On the surface facing inward in the front-rear direction in the end cap part, there is a lubricating oil supply groove whose one end communicates with a lubricating oil supply hole formed through the end cap part and the other end communicates with the ball circulation path. In the direct-acting guide device that is formed, the ends of the moving block end caps that face inward in the front-rear direction are located closer to the outer circumference than the lubricating oil supply groove, and both ends communicate with the ball circulation path to prevent leakage. It is characterized in that a groove is formed.

[0008]

[Action]

 If a leak-prevention groove with both ends communicating with the ball circulation path is formed in the portion of the moving block end cap portion that faces the inner side in the front-rear direction, near the outer periphery of the lubricating oil supply groove, the lubricating oil Lubricating oil that overflows from the supply groove enters the leakage prevention groove and is sent to the ball circulation path through this groove.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show the direct-acting type guide device in an assembled state, and FIGS. 4 to 7 show details of each part thereof.

1 to 3, the direct-acting guide device includes a linear guide rail (A) and a moving body (B) moving across the guide rail (A).

As the guide rail (A), a round rail whose cross section is substantially square and whose four corners form part of one cylindrical surface is used. A shallow groove (1) extending in the front-rear direction is formed on both left and right sides of the rail (A), and arc groove-shaped ball guide surfaces (2) (3) are formed above and below the groove (1) on both sides. Has been formed.

The moving body (B) is composed of a moving block (4) having a substantially inverted U-shaped cross section and straddling the upper part of the rail (A), and an annular ball circulation path (5) (5) formed in the moving block (4). It consists of a plurality of balls (7) that circulate in 6) and roll between the guide surfaces (2) and (3) of the rail (A).

The movable block (4) in the assembled state is composed of the end cap portions (8) at the front and rear ends and the remaining intermediate portion (9), and each of these portions (8) and (9) is on the left and right sides. The leg portions (leg-shaped portions) (10) and (11) and the connecting portions (12) (13) that connect the upper ends of the left and right leg portions (10) and (11). The corner of the moving block (4) is formed into a curved surface so as to fit the round guide rail (A).

The ball circulation paths (5) and (6) are formed in upper and lower two stages on the leg portions (10) and (11) on both sides of the moving block (4), as described in detail below. On the rail (A) side of the legs (11) on both sides of the intermediate part (9) of the moving block (4), that is, on the inner side in the left-right direction, the upper and lower two steps facing the guide surfaces (2) (3) of the rail (A) The arc-shaped grooves (14) and (15) are formed, and the retainer (16) is provided between the upper and lower grooves (14) and (15). The upper groove (14) and the upper part of the cage (16) have an upper outward path (17), and the lower groove (15) and the lower part of the cage (16) have a lower outward path (18). Are formed. Further, upper and lower two-tiered hole-like return paths (19) and (20) are formed at portions outside the outward paths (17) and (18) of the leg portions (11) on both sides of the intermediate portion (9). Between the both ends of the intermediate part (9) and the legs (10) on both sides of the end cap part (8), a semicircular shape connecting the end of the upper path (17) and the end of the upper path (19) is connected. An upper inversion path (21) is formed, and an outward circulation path (5) is formed by the outward path (17), the return path (19) and the inversion paths (21) at both ends thereof. Similarly, a half connecting the end of the lower outward path (18) and the end of the lower return path (20) between both ends of the intermediate part (9) and the legs (10) on both sides of the end cap part (8). The lower circular inversion path (22) is formed, and the inward path (18), the inward path (20), and the inversion paths (22) at both ends thereof form the lower circulation path (6).

The ball (7) is enclosed in each ball circulation path (5) (6), and the ball (7) at the forward path (17) part of the upper circulation path (5) is connected to the rail (A). Contact the upper guide surfaces (2) on both sides, and the balls (7) in the outward path (18) of the lower circulation path (6) contact the lower guide surfaces (3) on both sides of the rail (A). is doing.

When the moving block (4) moves back and forth, the balls (7) roll on the guide surfaces (2) and (3) of the rail (A) as follows, respectively. ) Circulate (6). In other words, the movement of the moving block (4) causes the ball (7) on the outward path (17) (18) of the circulation path (5) (6) to roll on the guide surface (2) (3) of the rail (A). Move to the rear of the forward path (17) (18). Therefore, the ball (7) on the outward path (17) (18) enters the inversion path (21) (22) in order, and the ball (7) on the inversion path (21) (22) in order in the return path (19). ) (20), the ball (7) on the return route (19) (20) enters the forward route (17) (18) in sequence.

As shown in FIG. 5, the moving block (4) is constructed by combining two end cap portions (8), a central body portion (24) and two cage members (25). .

As shown in FIGS. 5 to 7, a groove (26) is formed over the entire left and right width on the front, rear, and inward faces of the legs (10) on both sides of the end cap portion (8). A ridge (27) protruding inward in the front-rear direction is formed below the groove (26). The upper and lower side wall surfaces of the groove (26) are inclined surfaces that are slightly open inward in the left-right direction. Shallow arcuate recesses (28) (29) are formed above and below the bottom surface of the groove (26). A semicircular groove-shaped notch (31) is formed in the laterally intermediate portion of the surface of the ridge (27) facing inward in the front-rear direction. In addition, a semicircular groove-shaped recess whose lower end faces the groove (26) at a portion above the groove (26) on the inward and rearward surfaces of the legs (10) on both sides of the end cap portion (8). (30) is formed. A grease nipple mounting hole (lubricating oil supply hole) (32) is formed through the end cap portion (8) in the left-right center of the connecting portion (12) in the front-rear direction. A grease nipple (not shown) can be attached to the outer end in the front-rear direction of 32). On the surface of the end cap portion (8) that faces inward in the front-rear direction, there is a grease supply groove (33) whose one end communicates with the grease nipple mounting hole (32) and the other end communicates with the left and right grooves (26). Has been formed. In addition, a grease supply groove (34), one end of which communicates with the grease supply groove (33) and the other end of which communicates with the recess (30), is formed on the inward-backward surface of the end cap portion (8). Has been done. Furthermore, in the area closer to the outer periphery than the grease supply groove (33), the left and right grooves (26) for communicating with the left and right grooves (26) are formed on the inward and rearward facing surfaces of the end cap portion (8). (35) is formed.

The cage member (25) includes a horizontal plate-like portion (11a) that constitutes a lower part of the left and right leg portions (11) of the intermediate portion (9) of the moving block (4), and a retainer (16). And the semi-cylindrical guide members (36) at the front and rear ends are integrally formed. Columnar parts (11b) are integrally formed at the front and rear ends of the edge on the inner side in the left-right direction of the horizontal plate part (11a). The retainer (16) is in the form of a vertical plate, and its front and rear ends are integrally connected to the columnar part (11b) by the connecting parts (37), so that the retainer (16) is located above the horizontal inner edge of the horizontal plate part (11a). positioned. The guide member (36) is integrally formed at both front and rear ends of the horizontal flat plate portion (11a) and extends upward, and the vertical middle portion thereof is integrally connected to the connecting portion (37). Further, the lower portion of the guide member (36) projects outward in the front-rear direction from the horizontal plate-shaped portion (11a). The guide member (36) has a cylindrical surface (36a) on the outer side in the front-rear direction, and a flat surface (36b) on the inner facing surface in the front-rear direction. Grease supply grooves (lubricating oil supply grooves) (38) extending vertically are formed on the flat surfaces (36b) of both guide members (36) over the entire length. The grease supply groove (38) does not need to be formed on both guide members (36), but may be formed on either one of the guide members (36). The flat surface (36b) of the guide member (36) is flush with the flat surface on the inner side in the front-rear direction of the columnar portion (11b) and the connecting portion (37). The outer flat surface of the connecting portion (37) in the front-rear direction is located outside the cylindrical surface (36a) of the guide member (36) and is flush with the outer flat surface of the columnar portion (11b) in the front-rear direction. , A vertical communication groove (39) is formed on this surface. The upper end of the communication groove (39) is opened on the upper surface of the connecting portion (37), and the lower end is opened on the lower surface thereof. The communicating groove (39) does not need to be formed in both the connecting portions (37), and may be formed in either one of the connecting portions (37).

A predetermined gap is provided between the edge of the horizontal plate-shaped portion (11a) on the inner side in the left-right direction and the lower edge of the retainer (16). Ball guide surfaces (40) and (41) are formed on the edges of the horizontal and horizontal sides of the horizontal flat plate portion (11a), respectively. Also, cutouts (42) that connect both ball guide surfaces (40) (41) to the front and rear ends of the part between both ball guide surfaces (40) (41) on the upper surface of the horizontal plate-like part (11a). ) Is formed. The notch (42) also communicates with the lower end of the grease supply groove (38). Ball guide surfaces (43) and (44) are formed on both upper and lower edges of the cage (16), respectively. Further, ball guide surfaces are formed on both upper and lower surfaces of the connecting portion (37).

The central body portion (24) has a core portion (11c) obtained by removing the cage member (25) from the legs (11) on both sides of the intermediate portion (9), and a connecting portion (13). It is integrally formed, and its length is slightly smaller than the mutual distance between the flat surfaces (36b) of the guide members (36) before and after the cage member (25). A groove (14) forming the upper outward path (17) is formed in the upper part of the inner surface in the left-right direction of the core portion (11c), and a groove (15) forming the lower outward path (18) is formed in the lower part. Has been formed. A through hole (45) that forms the return path (19) of the upper stage is formed at a slightly lower portion on the outer side in the left-right direction of the groove (14) of the upper stage of the core part (11c), and the groove (15) of the lower stage is formed. A groove (46) having side and bottom openings is formed in a slightly upper portion on the outer side in the left-right direction to form a return path (20) in the lower stage.

The main body portion (24) and the cage member (25) are such that the core portion (11c) of the main body portion (24) is the horizontal plate-like portion (11a) of the cage member (25), the cage (16) and the front and rear. It is assembled so as to fit in the space surrounded by the guide member (36) and the connecting portion (37). As a result, the lower surface of the core portion (11c) contacts the upper surface of the horizontal plate-like portion (11a) between the guide members (36), and the front and rear end surfaces of the core portion (11c) are connected to each other. The flat surface (36b) of () contacts the front and rear inner flat surfaces of the connecting portion (37) and the columnar portion (11b) front and rear inner flat surface. Then, the groove (46) on the lower side of the core portion (11c) and the ball guide surface (41) on the outer side of the horizontal plate-like portion (11a) form a return path (20) in the lower stage. Further, the inner surface of the core portion (11c) in the left-right direction contacts the cage (16). The upper groove (14) of the core portion (11c) and the ball guide surface (43) at the upper edge of the retainer (16) form the upper outward path (17), which is below the core portion (11c). The side groove (15), the ball guide surface (40) inside the horizontal plate (11a), and the ball guide surface (44) at the lower edge of the cage (16) lower the forward path (18). Is formed.

In this state, the end cap portions (8) are attached to both ends of the main body portion (24) and the cage member (25) as follows. That is, the cage (16) of the cage member (25), the columnar part (11b) and the connecting part (37) are fitted into the groove (26) of the end cap part (8), and the columnar part (11b) and the connecting part ( The flat surface (34a) on the outer side in the front-rear direction of 37) is brought into contact with the bottom of the groove (26) of the end cap portion (8). As a result, the end face of the connecting part (12) of the end cap part (8) comes into contact with the end face of the main body part (24). Fix and. At this time, the cage member (25) is positioned by fitting both ends of the cage member (25) into the grooves (26) of the end cap portion (8), and the end cap portions ( The cage member (25) is also fixed only by fixing 8). When the end cap part (8) is attached in this way, the lower part of the guide member (36) of the cage member (25) fits into the notch (31) of the ridge (27) of the end cap part (8). Together, the top fits into the recess (30) in the end cap portion (8). There is a gap between the upper end of the guide member (36) and the upper end of the recess (30). Then, the upper part of the guide member (36) and the upper recess (28) of the end cap part (8) form an upper stage inversion path (21), which is the upper stage outward path (17) and return path (19). An upper ball circulation path (5) is formed in communication with the above. Further, the lower part of the guide member (36) and the lower recess (29) of the end cap part (8) form a lower inverting path (22), which is the lower outward path (18) and the return path (22). The lower ball circulation path (6) is formed in communication with 20).

In the assembled state, the communication groove (39) formed on the flat outer surface of the connecting portion (37) in the front-rear direction causes the reversing paths (21) on both sides of the upper ball circulation path (5) and the lower path of the lower stage. The reversing passages (22) on both sides of the ball circulation passage (6) are connected to each other, and the grease supplied to the upper ball circulation passage (5) passes through the groove (39) and the lower ball circulation passage. It will be supplied to (6). Also, due to the grease supply groove (34), the grease supply groove (38) on the flat surface (36b) of the guide member (36), and the notch (42), the lower outward path (18) and return path (20) are It is in communication with the grease supply groove (33). Further, both ends of the leakage prevention groove (35) are communicated with a portion outside the connecting portion (37) in the upper and lower inversion paths (21) on both left and right sides.

Then, the grease injected from the grease nipple attached to the grease nipple mounting hole (32) passes through the grease supply groove (33) and enters the upper reversing path (21) to the upper ball circulating path. It is supplied to (5). In addition, the grease entering the upper reversing path (21) enters the lower reversing path (22) through the groove (38) formed on the flat surface (34a) of the connecting part (37), and then the lower step. It is designed to be supplied to the ball circulation path (6) of the above, but there is not enough pressure to supply the grease supplied to the upper rotation path (21) to the lower rotation path (22). However, it is not possible to supply a sufficient amount of grease to the lower ball circulation path (6) through the groove (39). However, the grease in the grease supply groove (33) enters into the grease supply groove (38) from the grease supply groove (34) via the recess (30), and further through the notch (42) to the lower outward path. It enters into (18) and return path (20) and is supplied to the lower ball circulation path (6). Therefore, a sufficient amount of grease is supplied to the lower ball circulation path (6).

Further, the grease overflowing from the grease supply grooves (33) (34) enters into the leakage preventing groove (35) formed on the outer side of the grease supply groove (35) and passes through the groove (35) to reach the upper stage. Sent to the ball turnover path (21). Therefore, the grease is prevented from leaking to the outside.

[0028]

[Effect of device]

 According to the direct-acting guide device of the present invention, as described above, the lubricating oil overflowing from the lubricating oil supply groove enters the leak preventing groove and is sent to the ball circulation path through the groove. . Therefore, leakage to the outside through the boundary between the end cap portion and the intermediate portion is prevented.

[Brief description of drawings]

FIG. 1 is a perspective view of a direct-acting guide device according to the present invention in an assembled state showing an overall configuration thereof.

FIG. 2 is an enlarged sectional view taken along line II-II in FIG.

3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an exploded perspective view of a moving block.

FIG. 6 is a view showing an end cap portion as viewed from the front and rear inward direction.

7 is an enlarged sectional view taken along line VII-VII of FIG.

[Explanation of symbols]

4 moving block 5 ball circulation path 6 ball circulation path 7 ball 8 end cap part 9 middle part 16 cage 17 forward path 18 forward path 19 return path 20 return path 21 reverse path 22 reverse path 32 grease nipple mounting hole (lubricating oil supply hole) 33 grease Supply groove (lubricating oil supply groove) 35 Leakage prevention groove A Guide rail B Moving body

Claims (1)

[Scope of utility model registration request] 1. A linear guide rail and a moving body that moves along the guide rail, the moving body comprising:
The moving block has an annular ball circulation path and a plurality of balls that circulate in the ball circulation path of the moving block and roll between the guide rails. And a ball circulation path formed on the guide rail side of the middle portion of the moving block so as to face the guide rail by using a retainer, and a ball circulation path formed on the outer side of these forward paths. And a reverse path formed by fitting guide members integrally formed at both ends of the intermediate portion of the moving block to the end cap portions at both ends to connect the forward path end and the backward path end. The end surface of the movable block facing inward in the front-rear direction is connected to a lubricating oil supply hole formed in the end cap portion in a penetrating manner. In a direct-acting guide device in which a lubricating oil supply groove whose other end communicates with a ball circulation path is formed, in a surface of the moving block that faces the inner side in the front-rear direction of the end cap portion, is located closer to the outer periphery than the lubricating oil supply groove. A direct-acting guide device, characterized in that a leak-preventing groove having both ends communicating with the ball circulation path is formed in the portion.