JPH0571442U - Direct acting guide device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent lubricant from leaking to the outside. Efficiently supply a sufficient amount of lubricating oil to the ball circulation path. [Structure] In an end cap portion 8 of a moving block 4 of a moving body B that moves across a linear guide rail A, one end is open to the inversion paths 21 and 22 of the ball circulation paths 5 and 6, and the other end is an end. Lubricating oil supply passages 25 and 26 that open to the outer surface of the cap portion 8 are formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a linear guide device used for linear movement of, for example, a table of a machine tool, and more specifically, a linear guide guide including a linear guide rail and a moving body that moves along the guide rail. Regarding the device.

In this specification, front and rear, left and right refer to the moving direction of a moving body.

[0003]

[Prior Art]

 Conventionally, as a direct-acting type guide device of this type, a moving block having a substantially U-shaped cross section and a moving block in which a moving body has two upper and lower annular ball circulation paths on both leg-shaped portions respectively. Each ball circulation path consists of a plurality of balls that circulate in each ball circulation path and roll between it and the guide rail.The moving block consists of end cap parts at both ends and the remaining intermediate part. A guideway is formed on the guide rail sides of the leg parts on both sides of the intermediate part of the moving block so that the guide rail faces the guide rail. A guide member is fitted to the end cap portions at both ends of the moving block and the formed return path, and is formed between the intermediate portion and the end cap portion to connect the end of the forward path and the end of the return path. Consisting of an inversion path and Known (see JP-A-3-153916).

By the way, in the case of such a direct-acting type guide device, it is necessary to supply lubricating oil such as grease to the ball circulation path, and conventionally, in the center portion of the connecting portion of the end cap portion in the left-right direction, Direction through hole is formed, the lubricating oil supply port is attached to the outer end opening in the front-rear direction of this through hole, and the lubricating oil injected from this lubricating oil supply port faces the intermediate part side of the end cap part. It is designed to be supplied to the inversion path of the ball circulation path through the lubricating oil supply groove formed on the surface.

[0005]

[Problems to be solved by the device]

 However, in the conventional direct-acting guide device, since the cross-sectional area of the lubricating oil supply groove is small, the lubricating oil overflows from the groove while passing through the supply groove, and the external area is discharged from between the end cap portion and the intermediate portion. There is a problem of leaking to. Further, since the cross-sectional area of the supply groove is small, the lubricating oil does not flow smoothly, and there is a problem that a sufficient amount of lubricating oil cannot be efficiently supplied to the reversing path.

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 direct-acting 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 consists of the end caps at the front and rear ends and the rest of the intermediate part, and the ball circulation path is on the guide rail side of the moving block. A groove-shaped outward path formed to face the guide rail, a hole-shaped return path formed on the outside of the outward path of these leg-shaped portions in the left-right direction, and an end of the outward path formed at both front and rear ends of the moving block. In a direct-acting type guide device consisting of a reverse path connecting the ends of the return path and at least one of the end cap parts, one end is the reverse path of the ball circulation path. It is characterized in that a lubricating oil supply passage is formed which is opened and the other end is opened to the outer surface of the end cap portion.

[0008]

[Action]

 The lubricating oil supply passage is formed in either one of the end caps, one end of which opens to the reversal passage of the ball circulation passage and the other end of which opens to the outer surface of the end cap portion. It is directly supplied to the reversal path of the ball circulation path from the outer surface side opening of the supply path through the lubricating oil supply path.

[0009]

【Example】

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

1 to 3 show the direct acting guide device in an assembled state, and FIG. 4 shows the direct acting guide device in a disassembled state.

1 to 3, the direct-acting guide device includes a linear guide rail (A) and a moving body (B) that moves 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) includes a moving block (4) having a substantially U-shaped cross section and an annular ball circulation path (5) (5) formed on 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) (11) and the connecting portions (12) (13) connecting the upper ends of the left and right leg portions (10) (11). The corners of the moving block (4) are curved to match the round guide rails (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 middle 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) and (3) of the rail (A). The circular 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-stage hole-like return paths (19) and (20) are formed on the outer side of the outward paths (17) and (18) of the leg portions (11) on both sides of the intermediate part (9). A half that connects the end of the upper outward path (17) and the end of the upper return path (19) between both ends of the moving block (4) and the legs (10) on both sides of the end cap part (8). An upper circular 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, connect the end of the lower outward path (18) and the end of the lower return path (20) between the ends of the moving block (4) and the legs (10) on both sides of the end cap part (8). A circular lower inversion path (22) is formed, and a lower circulation path (6) is formed by the outward path (18), the return path (20) and the inversion paths (22) at both ends of these.

The ball (7) is enclosed in each ball circulation path (5) (6), and the ball (7) in 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) on 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.

A projecting wall (23) projecting outward over the entire circumference of the end cap portion (8) is integrally formed at the peripheral portion of the frontward and rearward outward surface of the end cap portion (8). A recess (24) is formed in the part surrounded by (23). Although not shown, the recess (24) on the outer surface of the end cap portion (8) is covered with a cover or a sealing member. In the legs (10) of both end cap parts (8), one ends open to the reversing paths (21) and (22) of the ball circulation paths (5) and (6) and the other ends to the end cap parts (8). Two upper and lower lubricating oil supply passages (25) and (26) are formed on the outer surface of which extend in the front-rear direction. An oil sump member (27) for accumulating lubricating oil is arranged in the recess (24) at a portion corresponding to both legs (10), and a predetermined amount of lubricating oil is stored in the oil sump member (27). It is included. Two upper and lower lubricating oil supply tubular portions (27a) projecting inward in the front-rear direction are integrally formed on the oil sump member (27), and these tubular portions (27a) are connected to the lubricating oil supply passages (25) (26). Both oil sump members (27) are connected to the lubricating oil supply passages (25) and (26) by being inserted into (). The left and right oil sump members (27) in the one end cap portion (8) are connected to each other by a communication pipe (28). Lubricating oil supply ports (29) are provided at the left and right central portions of the communication pipe (28), and penetrate the cover or the seal member to project outward.

When the moving block (4) moves back and forth, the balls (7) roll on the guide surfaces (2) and (3) of the rail (A), respectively, as follows. ) Circulate (6). That is, 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 reversal path (21) (22) in order, and the ball (7) on the inversion path (21) (22) in order the return path (19 ) (20), and the ball (7) on the return route (19) (20) enters the forward route (17) (18) in sequence. At this time, the lubricating oil is directly supplied from the oil sump member (27) through the lubricating oil supply passages (25) and (26) to the inversion passages (21) and (22). Replenishment of the lubricating oil to the oil sump member (27) is performed through the lubricating oil supply port (29) and the communication pipe (28) every predetermined time.

As shown in FIG. 4, the moving block (4) is constructed by combining two end cap portions (8), a central body portion (31) and two cage members (32). ..

Grooves (33) extending over the entire width in the left-right direction are formed on the surfaces of the leg portions (10) on both sides of the end cap portion (8) that face inward in the front-rear direction. Shallow arc-shaped recesses (34) (35) are formed above and below the surface of the groove (33) that faces inward in the front-rear direction.

The cage member (32) is composed of the lower horizontal plate-like portion (11a) of the legs (11) on both sides of the intermediate portion (9) of the moving block (4) and the retainer (16). It is integrally formed of resin. Columnar parts (50) are integrally formed at the front and rear ends of the outer edge in the left-right direction of the horizontal flat plate part (11a). The upper and lower intermediate parts of the columnar part (50) and the cage (16) are integrally connected by a connecting part (37). Semi-cylindrical guide members (36) extending vertically are integrally formed on both upper and lower surfaces of the left and right intermediate portions of the connecting portion (37). The lower end of the lower guide member (36) is connected to the horizontal plate-like portion (11a). The cage (16) is in the form of a vertical plate and is located above the inner edge of the horizontal plate (11a) in the left-right direction. The guide member (36) has a cylindrical surface on the outer side in the front-rear direction and a flat surface on the opposite surface on the inner side in the front-rear direction. A predetermined space is provided between the edge of the horizontal flat plate portion (11a) on the inner side in the left-right direction and the lower edge of the retainer (16). Ball guide surfaces (38) and (39) are respectively formed on the inner and outer edges of the horizontal plate portion (11a) in the left-right direction. A ball guide surface (41) is also formed on the lower edge of the retainer (16) corresponding to the ball guide surface (38) on the inner side of the horizontal plate portion (11a). A ball guide surface (42) is also formed on the upper edge of the cage (16). Further, ball guide surfaces (43) are formed on both upper and lower surfaces of the connecting portion (37).

The central body part (31) has a core part (11b) obtained by removing the cage member (32) from the legs (11) on both sides of the intermediate part (9) and a connecting part (13). It is formed integrally. A groove (14) that forms the upper outward path (17) is formed in the upper part of the inner surface in the left-right direction of the core part (11b), and a groove (15) that forms the lower outward path (18) in the lower part. Are formed. A through hole (44) that forms the return path (19) of the upper stage is formed at a slightly lower position on the outer side in the left-right direction of the upper groove (14) of the core part (11b), and the left and right sides of the lower groove (15) are formed. A groove (45) having side and bottom openings is formed at a slightly upper portion on the outer side in the direction to form a return path (20) at a lower stage.

The main body portion (31) and the cage member (32) are such that the core portion (11b) of the main body portion (31) includes the horizontal plate portion (11a) of the cage member (32), the cage (16), and the cage member (16). It is assembled so as to fit in the space surrounded by the front and rear columnar parts (50), the connecting part (37) and the guide member (36). As a result, the lower surface of the core part (11b) contacts the upper surface of the horizontal plate-like part (11a), and the front and rear end surfaces of the core part (11b) are the front and rear pillar parts (50), the connecting part (37) and the guide (37). It contacts the front, rear, inward and flat surfaces of the member (36). A lower return path (20) is formed by the groove (45) on the outer side of the lower portion of the core portion (11b) and the ball guide surface (39) on the outer side of the horizontal plate-like portion (11a). Further, the inner surface of the core portion (11b) in the left-right direction contacts the retainer (16), and the groove (14) on the upper portion of the core portion (11b) and the guide surface (42) of the upper edge of the retainer (16). ) Forms the upper outward path (17), the inner groove (15) at the bottom of the core portion (11b), the ball guide surface (38) inside the horizontal flat plate portion (11a), The lower guide path (18) is formed by the ball guide surface (41) at the lower edge of the cage (16).

In this state, both ends of the cage member (32) are fitted in the grooves (33) of the end cap portion (8). At this time, the upper part of the upper guide member (36) and the lower part of the lower guide member (36) were formed on both the upper and lower sides of the groove (33) in the front-back inward surface of the end cap part (8). Fit in the recess (46). In this state, when the end cap portion (8) is fixed to the central body portion (31) with a screw (not shown), the cage member (32) is also fixed. Then, the cylindrical surface of the upper guide member (36), the ball guide surface (43) on the upper surface of the connecting portion (34), and the upper recess (34) of the end cap portion (8) make the upper reversal path. (21) is formed, and this communicates with the upper path (17) and the return path (19) to form the upper ball circulation path (5). In addition, the lower guide member (36), the ball guide surface (43) on the lower surface of the connecting portion (34), and the lower recess (35) of the end cap portion (8) form the lower inverting path ( 22) is formed, and this communicates with the outward path (18) and the return path (20) in the lower stage, and the ball circulation path (6) in the lower stage is formed.

It is not necessary to form the lubricating oil supply passages (25) and (26) in both end cap portions (8), but in either one of the end cap portions (8). Good. In this case, the oil sump member (27) may be arranged only outside the one end cap portion (8). Further, the oil sump member (27) is not always necessary.

5 to 7 show another embodiment of the present invention. In FIG. 5, the linear guide device is fixed to the two linear guide rails (A1) fixed to the bed (60) and the table (61) and moves along each guide rail (A1). It consists of two moving bodies (B1).

On the outer surface in the left-right direction of the guide rail (A1), there are formed two upper and lower arc groove-shaped ball guide surfaces (62) (63) extending in the front-rear direction.

The moving body (B1) circulates through the moving block (64) and the two upper and lower annular ball circulation paths (65, 66) formed in the moving block (64) to guide the rail (A1). It consists of a number of balls (67) that roll between surfaces. As shown in FIG. 6, the moving block (64) is composed of front and rear end cap portions (68) and the remaining intermediate portion (69), which are screwed together. A groove (70) extending in the front-rear direction is formed on the rail (A1) side of the intermediate portion (69), and arc groove-shaped ball outward paths (71) (72) are formed above and below the groove (70). .. The balls (67) of the ball outward paths (71) (72) are held by a cage (73) screwed to the intermediate portion (69). Further, hole-like ball return paths (74) (75) are formed in the intermediate portion (69). As shown in FIG. 7, recesses (86) (87) formed on the inner surface of the end cap portion (68) in the front-rear direction and grooves (76) (formed on the front and rear end surfaces of the intermediate portion (69). 77), a ball reversal path (78) (79) that connects the ends of the outward paths (71) (72) and the ends of the return paths (74) (75) is formed. 72), the return paths (74) (75) and the reversal paths (78) (79) at both ends form ball circulation paths (65) (66). The configurations of the guide rail (A1) and the moving body (B1) are publicly known as described in, for example, Japanese Patent Application Laid-Open No. 58-14020, and detailed description thereof will be omitted.

As shown in FIG. 6 and FIG. 7, a projecting wall (80) projecting outward over the entire circumference is integrally formed at the peripheral edge of the front-back outward surface of the end cap portion (68). A recess (81) is formed in the portion surrounded by the protruding wall (80). Although not shown, the recess (81) on the outer surface of the end cap portion (68) is covered with a cover or a sealing member in this embodiment as well. The front and rear ends of both end caps (68) are open at the reversing passages (78) (79) of the ball circulation passages (65) (66) and at the other end at the outer surface of the end cap (68). Two upper and lower lubricating oil supply paths (84) (85) extending in the direction are formed.

An oil sump member (82) having a lubricating oil supply port (83) is detachably attached to the recess (81) on the outer surface of the end cap portion (68). The oil sump member (82) is also preferably made of synthetic resin or a material having rubber-like elasticity. Further, the oil sump member (82) is formed with two tubular portions (82a) to be inserted into the lubricating oil supply passages (84) (85). The lubricating oil in the oil sump member (82) is directly supplied to the reversing passages (78) (79) through the lubricating oil supply passages (84) (85). The lubricating oil is supplied to the oil sump member (82) through the lubricating oil supply port (83) every predetermined time.

Also in this embodiment, it is not necessary to form the lubricating oil supply passages (84) (85) in both end cap portions (68), and either one of the end cap portions (68) ). In this case, the oil sump member (82) may be arranged only outside the one end cap portion (68). Further, the oil sump member (82) is not always necessary.

[0032]

[Effect of the device]

 According to the direct-acting guide device of the present invention, as described above, the lubricating oil is directly supplied to the reversing passage of the ball circulation passage through the lubricating oil supply passage, so that the end cap portion and the intermediate portion are provided as in the conventional case. It is prevented from leaking to the outside from between the parts. Moreover, it becomes possible to supply a sufficient amount of lubricating oil to the ball circulation path.

[Brief description of drawings]

1 is a vertical longitudinal sectional view (a sectional view taken along the line I-I of FIG. 2) of a linear guide device according to the present invention.

FIG. 2 is likewise a vertical cross-sectional view.

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

FIG. 4 is a perspective view of the same in an exploded state.

FIG. 5 is a vertical cross-sectional view showing another embodiment of the linear guide device according to the present invention.

FIG. 6 is a perspective view of a disassembled state showing a part of the moving block.

FIG. 7 is also an enlarged vertical sectional view showing a part of the end cap portion.

[Explanation of Codes] 4 Moving Block 5 Ball Circulating Path 6 Ball Circulating Path 7 Ball 8 End Cap Part 9 Middle Part 14 Outgoing Path 15 Outgoing Path 19 Return Path 20 Return Path 21 Inversion Path 22 Inversion Path 26 Lubricating Oil Supply Path 64 Moving Block 65 Ball Circulation Route 66 Ball circulation route 67 Ball 71 Forward route 72 Forward route 74 Return route 75 Return route 78 Inversion route 79 Inversion route 84 Lubricating oil supply route 85 Lubricating oil supply route A Guide rail B Moving body A1 Guide rail B1 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:
It consists of a moving block that 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. Consisting of parts and
A ball circulation path is formed on the guide rail side of the moving block so as to face the guide rail, and a hole-shaped return path formed on the outer side in the left-right direction of the forward path of these leg-shaped portions. In a direct drive type guide device formed at both front and rear ends of a block and comprising a reversing path connecting an end of a forward path and an end of a returning path, in at least one of the end cap portions, one end is a reversing path of a ball circulation path. A direct-acting type guide device, characterized in that a lubricating oil supply passage is formed which is opened and the other end is opened on the outer surface of the end cap portion.