JPH03113116A - Direct acting guide device - Google Patents

Abstract

PURPOSE:To reduce number of parts and assembling steps by integrating each holder of balls on both sides of a direct acting guide device and guide members on both sides thereof. CONSTITUTION:A moving block mounted on a guide rail A is composed of end cap parts 10, 11, a center main body part 26, and two cage members 27. The cage member 27 is formed by integrating a ball holder 28 and guide members 29 on both ends thereof. The holder 8 is positioned only by fitting the guide members 29 on both ends of the cage members to cutout pars 28 of the end cap parts 10, 11, and inversion passage of the ball is formed. The number of parts and assembling steps are thus reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a linear guide device, more specifically, a linear guide device comprising a linear guide rail and a movable body that moves astride the guide rail. Regarding.

BACKGROUND TECHNOLOGY AND PROBLEM TO BE SOLVED BY THE INVENTION In a conventional direct-acting guide device of this type, a movable body includes a movable block having an approximately inverted U-shaped cross section and a movable block having an annular ball circulation path in each leg-shaped portion on both sides; It consists of a plurality of balls that circulate in the ball circulation path of the block and roll between it and the guide rail, and the moving block consists of end cap portions at both ends and the remaining intermediate portion. The ball circulation path consists of a groove-shaped outgoing path formed using a retainer on the guide rail side of the leg-like parts on both sides of the intermediate portion of the moving block so as to face the guide rail, and an outgoing path of these leg-like parts. It consists of a return path in the form of a hole formed on the outside, and a reversal path that is formed by fitting guide members into end cap portions at both ends of the moving block and connects the ends of the forward path and the end of the return path.

By the way, since the moving block of such a linear guide device has a complicated structure, it is impossible to form the whole unit as one piece. Of the leg-shaped parts, two cage parts outside the return path of the ball circulation path, two cage parts, four guide member parts, and the remaining central body part of the intermediate part are separately formed. , These are combined to form a moving block.

For this reason, there is a problem that the number of parts increases and the number of assembly steps also increases. In particular, the guide member fitted into the end cap part is separated from other parts, and the retainer needs to be fixed using bolts, screws, etc., making the assembly process complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a direct-acting guide device that can solve the above problems and reduce the number of parts and assembly man-hours.

Means for Solving the Problems A direct-acting guide device according to the present invention includes a linear guide rail and a movable body that moves astride the guide rail. Consisting of a moving block with a generally inverted U-shaped cross section having a ball circulation path, and a plurality of balls circulating in the ball circulation path of the moving block and rolling between the guide rail,
The moving block consists of end cap parts at both ends and the remaining middle part, and the ball circulation path faces the guide rail using a retainer on the guide rail side of the leg-shaped parts on both sides of the middle part of the moving block. The forward path is formed by a groove-shaped outward path formed as shown in FIG. A linear guide device comprising a reversing path connecting an end of the holder and an end of the returning path, characterized in that each retainer on both sides and the guide members at both ends thereof are integrally formed.

Since the action retainer and the guide members at both ends thereof are integrally formed, the number of parts and the number of assembly steps are reduced accordingly. In particular, since the guide member is integrally formed with the retainer, it is easy to assemble the guide member, and the retainer can be positioned simply by fitting the guide member into the end cap, and bolts are required to attach the retainer. No screws or screws are required.

Example Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the overall structure of the direct-acting guide device in an assembled state, and FIGS. 2 to 5 show details of each part thereof. Also, the 6th
The figure is an exploded perspective view of the guide device.

In FIGS. 1 to 5, the guide device includes a linear guide rail (A) and a moving body (B) that moves astride the linear guide rail (A).
It consists of In addition, in the following explanation, front, rear, left and right are
This refers to the moving direction of the moving body (B).

The guide rail (A) has a substantially rectangular cross-sectional shape. There are short protrusions (
1) is formed. The rail (A) above the protrusion (1)
) is slightly narrower than that at the bottom, and the width of the protrusion (1) gradually becomes wider as it goes downward.

Further, ball guide surfaces (2) and (3) in the shape of arc grooves are formed above and below the protrusions (1) on both sides.

The moving body (B) has a moving block (4) with a roughly U-shaped cross section that straddles the upper part of the rail (A), and an annular ball circulation path (5) (B) formed in the moving block (4). It consists of a plurality of balls (7) that circulate and roll between the guide surfaces (2) and (3) of the rail (^).

The assembled moving block (4) has end cap portions (10) and (11) at both front and rear ends, and the remaining middle portion (12).
), and each of these parts (10) (11)
(12) are the legs (leg-like parts) on both the left and right sides (13) (
14) (15) and left and right legs (13) (14)
(15) Connecting part (1B) connecting the upper ends (17
) (18).

The ball circulation paths (5) (8) are connected to the legs (13) (14) on both sides of the moving block (4), as will be explained in detail below.
) (15) is formed in two stages, upper and lower. The rails (A) of the legs (15) on both sides of the moving block middle part (12)
) side, that is, on the inside in the left and right direction, there is a shallow and vertically wide groove () facing the guide surfaces (2) and (3) of the rail (A).
19) is formed, and a retainer (8) is provided in the middle of this groove (■9). The upper part of the groove (19) and the upper part of the retainer (8) form the upper outgoing path (20), and the lower part of the groove (19) and the lower part of the retainer (8) form the lower outgoing path (20).
21) is formed. Furthermore, two upper and lower hole-shaped return paths (22) and (23) are formed in the outer portions of the outbound paths (20) <21) of the legs (15) on both sides of the intermediate portion (12). The legs (13) on both sides of the end cap portions (to) (11) at both ends of the moving block (4) (1
4) is formed with a semicircular upper reversing path (24) connecting the end of the upper outgoing path (20) and the end of the upper returning path (22), and the outgoing path (20), the returning path (22) and these An upper circulation path (5) is formed by the reversing path (24) at both ends of the reversing path (24). Similarly, the legs (13) (14) on both sides of the end cap portions (10) (11) at both ends of the moving block (4)
) is formed with a semicircular lower reversing path (25) that connects the end of the lower outgoing path (21) and the end of the lower returning path (23). A lower circulation path (6) is formed by the reversing paths (25) at both ends.

A ball (7) is enclosed in each of the ball circulation paths (5) and (6), and the balls (7) in the outgoing path (20) of the upper circulation path (5) are placed in the upper part of both sides of the rail (A). Guide surface (2
), and the balls (7) on the outgoing path (21) of the lower circulation path (6) are in contact with the lower guide surfaces (3) on both sides of the rail (A).

When the moving block (4) moves back and forth, as follows:
The balls (7) circulate through the respective ball circulation paths (5) and (8) while rolling on the guide surfaces (2) and (3) of the rail (A). That is, due to the movement of the moving block (4), the balls (7) on the outward paths (20) and (21) of the circulation paths (5) and (8) roll on the guide surfaces (2) and (3) of the rails (A). and move backward on the outward journey (20) <21). For this reason, the ball (7) that was on the outbound route (20) (21)
) enters the reversal path (24) (25) in order, and the reversal path (2
4) The ball (7) that was at (25) is returned to (22) in order.
) (23), and the ball (7) that was on the return path (22) and (23) enters the outward path (20) and (21) in this order.

As shown in FIG. 6, the moving block (4) includes two end cap parts (10) (11), a central body part (2
B) and two cage members (27).

The legs (1) on both sides of the end cap parts (10) (11)
3) A substantially semicircular notch (28) reaching the lower end of the leg is formed on the (inner side in the front-rear direction of (14)).

This notch (28) has a stepped shape, with two small diameter parts (28a) (2gb) having the same diameter near the upper and lower ends, and large diameter parts (28a) (2gb) having the same diameter between them and two parts near the lower end. 28c) (2
8d).

The central body portion (26) is an integral portion of the intermediate portion (12) excluding the retainer (8). Grooves (19) constituting outward paths (20) and (21) are formed on the inner surfaces in the left-right direction of the legs (15) on both sides of the main body portion (26), and penetrating holes are formed outside of these grooves (19). Return routes (22) and (23) are formed by these.

The cage member (27) has guide members (29) integrally formed at both front and rear ends of the cage (8).

The opposing surface of the guide member (29) on the inside in the front-rear direction is a flat surface (
29e), and the guide member (29) is attached to the retainer (
8) extends outward in the front-rear and left-right directions.

Two small diameter parts (29a) (29b) of the guide member (29) above and below the retainer (8) have the same diameter, and two parts of the retainer (8) between these and the lower end have the same diameter. Large diameter part (29
c) (29d).

The cage member (27) has guide members (29) at both ends thereof.
At the part where the end caps at both ends (1°0) (
11). That is, the guide member (2
The upper and lower large diameter portions (29a) (29b) of 9) are tightly fitted into the upper and lower large diameter portions (28a) (28b) of the notches (28) of the end cap portions (10) (11). The flat surface (29e) is the end cap part (10) (1
It is flush with the end face of 1). Then, the guide member (
An upper reverse path (24) is formed between the upper small diameter part (29a) of the notch (28) and the lower small diameter part (29) of the guide member (29). 29b)
A lower reversal path (25) is formed between the small diameter portion (29b) and the lower small diameter portion (29b) of the notch (28). Also, between the end cap parts (10) and (11) at both ends, the main body part (2
B) is held in place and fixed at appropriate points with bolts, etc. As a result, the cage member (27) is also clamped between the end cap portions (to) (11) at both ends.
The retainer (8) is connected to the outgoing path (20) (21) of the main body portion (26).
) is positioned in the groove (19). Then, both ends of the upper and lower reversing paths (24) (25) are connected to the intermediate portion (1
2) corresponding outbound trips (20) (21) and return trips (22)
) (23), the upper and lower ball circulation paths (5)
(6) is formed.

Since the guide member (29) is integrally formed at both ends of the retainer (8), its installation is easy, and the guide member (29) can be inserted into the notch (28) of the end cap portion (10) (11). The cage (8) can be positioned simply by fitting it into the section, and there is no need to fix the cage (8) with bolts or screws.

In the above embodiment, the cross-sectional shape of the groove portion of the guide member (29) forming the reversing paths (24) and (25) is rectangular, but it may be circular. In this way, the ball (7) will not intensively hit a specific part of the guide member (29) and cause large wear, and
Since the ball (7) can be held in the groove having a circular cross section, assembly is also facilitated.

Effects of the Invention According to the direct-acting guide device of the present invention, as described above,
The number of parts and assembly man-hours can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a direct-acting guide device showing an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG.
Figure 4 is a sectional view taken along the line TV--TV in Figure 1, Figure 5 is a sectional view taken along line V-V in Figure 1, Figure 6 is an exploded view of the direct-acting guide device. FIG. (A)...Guide rail, (B)...Moving body, (4
)...Movement block, (5)(6)...Ball circulation path, (7)...Ball, (8)...Cage, (10
) (11)... End cap part, (12)...
Middle part, (13) (14) (15)... Leg part (
leg-shaped part), (20') (21)...outward path, (22
) (23)... Return path, (24) (25)... Reverse path, (27)... Cage member, (29)... Guide member. that's all

Claims (1)

[Claims] Consisting of a linear guide rail and a movable body that moves astride the guide rail, the movable body has an approximately inverted U-shaped cross section with annular ball circulation paths on both leg-like portions. It consists of a moving block and a plurality of balls that circulate in the ball circulation path of the moving block and roll between it and the guide rail.
The moving block consists of end cap parts at both ends and the remaining middle part, and the ball circulation path faces the guide rail using a retainer on the guide rail side of the leg-shaped parts on both sides of the middle part of the moving block. The forward path is formed by a groove-shaped outward path formed as shown in FIG. A direct-acting guide device comprising a reversing path connecting an end of the incoming path and an end of the returning path, characterized in that each retainer on both sides and the guide members at both ends thereof are integrally formed. .