JPH0562733U - Direct acting guide device - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the cost by reducing the number of parts and the number of assembly steps. Makes the ball roll smoothly on the ball inversion path. [Structure] The moving block 4 of a moving body B that moves across a linear guide rail A is composed of two first and second constituent members 23 and 24. The first component member 23 is composed of end cap portions 8 at the front and rear ends, and a connecting portion 25 that integrally connects both end cap portions 8 and includes at least the retainer 16. The second component member 24 constitutes the remaining part of the moving block 4 excluding the first component member 23. Inversion paths 21 and 22 are formed in both end cap portions 8 of the first component member 23, respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a linear motion guide device used for linear movement of a table of a machine tool, for example, a linear motion guide device including a linear guide rail and a moving body that moves across 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. Inversion path and The middle part of the block is a part of the leg parts on both sides, which is below the lower ball circulation path, outside the return path of the ball circulation path, on the cage, and on both ends of the guide member. It is known that the cage member has a substantially U-shaped cross section and the remaining central body portion (see Japanese Patent Laid-Open No. 3-153916).

[0004]

[Problems to be solved by the device]

 However, in the conventional direct-acting guide device, since the moving block is composed of two end cap parts and the middle part, and the middle part is composed of the two cage members and the central body part, the number of parts is increased and the number of assembling steps is increased. However, there is a problem that the cost increases due to the increase in cost. In addition, since the reversal path of the ball circulation path is composed of two parts, the guide member and the end cap part which is separate from this, there is no misalignment between the two ball guide surfaces during assembly. It may occur and the ball may not roll smoothly.

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

[0006]

[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 over the guide rail. The moving body has a substantially U-shaped cross section and is annularly formed on each of the left and right leg portions. It consists of a moving block that has a ball circulation path and a plurality of balls that circulate in each ball circulation path of the moving block and roll between a guide rail. A groove-shaped outward path formed on the guide rail side of the leg parts on both sides using a cage so as to face the guide rail, and a hole shape formed on the outer side in the left and right direction of the outward path of these leg parts. In the direct-acting guide device consisting of the return path and the reverse paths formed at the front and rear ends of the moving block and connecting the forward path end and the return path end, the moving block has the end cap parts at both the front and rear ends and both ends. Both end portions of the first constituent member are composed of a first constituent member that is a connecting portion that integrally connects the cap portions and includes at least a holder portion, and a second constituent member that constitutes the remaining portion. It is characterized in that each cap portion has an inversion path formed therein.

[0007]

[Action]

 The moving block includes a first component member which is an end cap portion at both front and rear ends and a connecting portion which integrally connects both end cap portions and includes at least a retainer portion, and a second constituent member which constitutes the remaining portion. Since it is composed of components, the number of parts is smaller and the assembly man-hour is smaller than the conventional direct-acting guide device.

Since the inversion paths are formed in both end cap portions of the first component member, each inversion path is formed in one part.

[0009]

【Example】

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

FIG. 1 shows the linear guide device in a disassembled state, and FIGS. 2 to 4 show the linear guide device in an assembled state.

2 to 4, the 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). At the front and rear ends of the moving block (4), a semi-circular upper stage inversion path (21) connecting the end of the upper path (17) and the end of the upper path (19) is formed. ), The return path (19) and the inversion paths (21) at both ends thereof form an upper circulation path (5). Similarly, a semi-circular lower inversion path (22) that connects the end of the lower path (18) and the end of the lower path (20) is formed at the front and rear ends of the moving block (4). The lower circulation path (6) is formed by the return path (20) and the inversion path (22) at both ends of the return path (20).

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.

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.

As shown in FIG. 1, the moving block (4) is constituted by combining two first and second constituent members (23, 24).

The first component member (23) is integrally molded of synthetic resin as a whole, and includes the end cap portions (8) at the front and rear ends and the leg portions (10) of both end cap portions (8). And a connecting portion (25) for connecting Two upper and lower reversing paths (21) and (22) are formed in the leg portions (10) on both sides of the end cap portion (8). The connecting part (25) consists of the lower horizontal plate part (11a) of the left and right leg parts (11) of the intermediate part (9) of the movable block (4) and the retainer (16). It was formed. The cage (16) has a vertical plate shape and is located above the edge of the horizontal plate portion (11a) on the inner side in the left-right direction. A predetermined space is provided between the horizontal inner edge of the horizontal plate portion (11a) and the lower edge of the retainer (16). Ball guide surfaces (26) and (27) are formed on both the inner and outer edges of the horizontal flat plate portion (11a) in the left-right direction. Ball guide surfaces (28) and (29) are formed on both upper and lower edges of the cage (16), respectively.

The second component member (24) of the moving block (4) is wholly integrally molded of synthetic resin, and the first component member (from the leg portions (11) on both sides of the intermediate portion (9) is The connecting portion (25) of 23), that is, the core portion (11b) excluding the horizontal plate portion (11a) and the retainer (16) portion, and the connecting portion (13) are integrally formed. , Its length is equal to the mutual distance between the front and rear end cap portions (8) facing inward and backward. 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) is formed in the lower part. Has been formed. A through hole (31) that forms the return path (19) of the upper stage is formed in the lower outer part in the left-right direction of the upper groove (14) of the core part (11b), and the lower groove (15). A groove (32) 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.

In the first and second constituent members (23) and (24), the core portion (11b) of the second constituent member (24) is connected to the end cap portions (8) before and after the first constituent member (23). It is assembled so that it fits into the space surrounded by the part (25). As a result, the lower surface of the core portion (11b) contacts the upper surface of the horizontal plate-like portion (11a), and the front and rear end surfaces of the core portion (11b) are connected to the legs (10) of the front and rear end cap portions (8). It touches the inner flat surface in the front-rear direction. A lower return path (20) is formed by the lower groove (32) of the core portion (11b) and the ball guide surface (27) at the outer edge of the horizontal plate-shaped portion (11a). Furthermore, the inner surface of the core portion (11b) in the left-right direction contacts the retainer (16). Then, the upper groove (14) of the core portion (11b) and the ball guide surface (28) at the upper edge of the cage (16) form the upper outward path (17), and the core portion (11b) The lower groove (15), the inner edge of the horizontal plate-like portion (11a) and the ball guide surfaces (26) (29) at the lower edge of the cage (16) form a lower outward path (18). The upper outward path (17) and the return path (19) communicate with the upper inversion path (21) to form the upper ball circulation path (5), and the lower outward path (18) and return path (20). A lower ball circulation path (6) is formed in communication with the lower reversal path (22).

In the above embodiment, the connecting portion (25) of the first component member (23) comprises the retainer (16) and the horizontal plate-like portion (11a), but the invention is not limited to this. It may consist of only (16). Further, the number of ball circulation paths (5) and (6) is not limited to the upper and lower two rows.

[0023]

[Effect of the device]

 According to the direct acting guide device of the present invention, as described above, the number of parts is smaller and the assembling man-hour is smaller than that of the conventional direct acting guide device, so that the cost is reduced. In addition, since each inversion path is formed as one component, the ball rolls smoothly on the inversion path.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a direct acting guide device according to the present invention.

FIG. 2 is a perspective view showing an assembled state of the direct acting guide device according to the present invention.

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

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

[Explanation of symbols]

 4 moving block 5 ball circulation path 6 ball circulation path 7 ball 8 end cap portion 9 middle portion 10 leg portion (leg portion) 11 leg portion (leg portion) 14 outward passage 15 outward passage 16 retainer 19 return passage 20 return passage 21 reverse passage 22 Inversion Path 23 First Component Member 24 Second Component Member 25 Connection Part

Claims (1)

[Scope of utility model registration request] 1. A linear guide rail and a moving body that moves across the guide rail.
A moving block having a substantially U-shaped cross section and having circular ball circulation paths in the left and right leg-shaped portions, respectively, and a plurality of balls circulating between the ball circulation paths of the movement block and the guide rails. Each ball circulation path consists of a groove-like outward path formed on the guide rail side of the leg-shaped parts on both the left and right sides of the moving block so as to face the guide rail using a retainer, and these leg-shaped parts. A direct-acting guide device comprising a hole-shaped return path formed on the outer side in the left-right direction of the forward path and reversal paths formed at both front and rear ends of the moving block to connect the forward path end and the backward path end Is a first constituent member including an end cap portion at both front and rear ends and a connecting portion that integrally connects both end cap portions and includes at least a retainer portion, and a second constituent portion that constitutes the remaining portion. Made of wood,
A direct-acting guide device, characterized in that inversion paths are formed in both end cap portions of the first component.