JPH03113115A - Direct acting guide device - Google Patents

Abstract

PURPOSE:To facilitate assembling by integrating an end cap part on one end of a movable block of a direct acting guide device, a part outer than returning passage of a ball in an intermediate parts and a holder part. CONSTITUTION:A movable block composed of first, second, third members C1, C2, C3 and a semi-cylindrical guide member D is mounted on a guide rail A. In a cap part 10 of one end and intermediate leg parts 13 of the movable block, cage pats 15a, that is, outer parts, along whose upper and lower sides grooves 28, 29 as a return passage of a ball are formed inside, and both side holder 8 are integrated by synthetic resin to form the first member C1. Assem bling is facilitated because it is only necessary to assemble the first, second, third members and the semi-cylindrical guide member while sealing the ball therein.

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 formed in the end cap portions at both ends of the moving block to connect the end 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. The two cage parts outside the return path of the ball circulation path, the two retainer parts, and the remaining central body part of the intermediate part are separately formed, and these parts are combined to form a moving block. It consists of

For this reason, there is a problem that the number of parts increases and the number of assembly steps also increases. In particular, the cage 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. A groove-shaped outward path is formed as shown in FIG. In a direct acting guide device consisting of a connecting reversing path, an end cap portion at one end of the moving block, a portion of the leg-like portions on both sides of the intermediate portion outside the return path of the ball circulation path, and a portion of the retainer. It is characterized by being integrally formed.

The end cap portion at one end of the moving block, the leg portions on both sides of the intermediate portion outside the return path of the ball circulation path, and the retainer portion are integrally formed.
This reduces the number of parts and the number of assembly steps. Since the retainer part is integrally formed with the end cap part at one end, the retainer can be positioned simply by fixing the end part of the retainer to the end cap part at the other end.
No bolts or screws are required to attach the retainer.

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

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

In FIGS. 1 to 6, 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)
The horizontal width of > is slightly narrower than that of the lower part, and the horizontal width of the ridge (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) includes a moving block (4) having a substantially inverted U-shaped cross section that straddles the upper part of the rail (A), and an annular ball circulation path (5) formed in the moving block (4) (B). It consists of a plurality of balls (7) that circulate and roll between the guide surfaces (2) and (3) of the rail (A).

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 the left and right legs (13) (14) (
15) Connecting part (16) (17) connecting the upper ends together
(1g).

The ball circulation paths (5) (6) are connected to the legs (i3) (14) on both sides of the moving block (4), as will be explained in detail next.
) (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 (19). 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. In addition, two upper and lower hole-shaped return passages (22) and (23) are formed in the outer portions of the outbound passages (20) and (21) of the legs (15) on both sides of the intermediate portion (12). Legs (13) (14) on both sides of the end cap portion (to) (11) at both ends of the moving block (4)
A semicircular upper reverse path (24) connecting the end of the upper forward path (20) and the end of the upper return path (22) is formed,
An upper circulation path (5) is formed by the outgoing path (20), the incoming path (22), and the reversing paths (24) at both ends thereof. Similarly, the legs (13) (14) on both sides of the end cap portions (10) (11) at both ends of the moving block (4)
A semicircular lower reverse path (25) connecting the end of the lower forward path (21) and the end of the lower return path (23) is formed,
A lower circulation path (6) is formed by the outgoing path (21), the incoming path (23), and the reversing paths (25) at both ends thereof.

A ball (7) is enclosed in each ball circulation path (5) (8), 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).

End cap portions (10) at both ends of the moving block (4)
) Relief grooves (26) are formed on the left-right inner surfaces of the legs (13) and (14) on both sides of (11) to avoid interference with the protrusions (1) of the rail (A). There is.

When the moving block (4) moves back and forth, as follows:
The balls (7) move on the guide surfaces (2) and (3) of the rail (A) while moving through the respective ball circulation paths (5) and (6).
cycle. In other words, due to the movement of the moving block (4), the balls (7) on the outbound paths (20) (21) of the circulation paths (5) (8) are moved to the guide surfaces (2) (3) of the rail (A).
Transfer to the upper position and move to the rear of the outbound route (20) (21). Therefore, the ball ()) that was on the outward path (20) (21) enters the reversal path (24) (25) in order, and the ball (7) that was on the reversal path (24) (25) sequentially enters the return path (24) (25).
22)<23), and the ball (7) that was on the return path (22) (23) enters the outward path (20) (21) in order.

As shown in FIG. 7, the moving block (4) includes a first member (CI), a second member (C2), a third member (central body portion) (C3), and four semi-cylindrical guide members (D). ) is constructed by combining.

The first member (C1) has an end cap portion (1
0), the lower part of the legs (15) on both sides of the intermediate portion (12), and the return path (22) (2) of the ball circulation path (5) (6).
3) The cage part (15a) including the outer part and the retainers (8) on both sides are integrally formed of synthetic resin. On the inside surface of the cage part (15a) in the left and right direction, there are two upper and lower grooves (
28) (29) are formed. A cage portion (15a) is attached to the inner surface of the end cap portion (10) in the front and back direction.
Continue to the upper and lower grooves (2g) (29) of the reversing path (
24) The two upper and lower semicircular grooves that make up (25) (
30) (31) are formed and these grooves (30)
A semicircular notch (32) shallower than these is formed in the area between (31). On the inner edge of the lower part of the cage part (15a) in the left and right direction, there is a protrusion (3) that protrudes slightly upward.
3) is formed, and this protrusion (33) and the cage part (15
-E', (34) is formed between the outer part of a). The cage parts (15a) on both sides and the retainer (
Connecting protrusions (35) and (36) are respectively formed on the end faces of 8).

The second member (C2) has an end cap portion (11
) are integrally formed. The cage portion of the first member (C1) (
Two recesses (37) corresponding to the projections (35) of 15a)
and two recesses (38) corresponding to the projections (36) of the retainer (8) of the first member (C1).

In addition, this surface also has two semicircular grooves (a
o) (31) and a semicircular notch (32) are formed.

The third member (C3) includes leg portions (
15) of the first member (C1) excluding the cage part (15a) and the retainer (8), and the connecting part (
18) are integrally formed. Core part (1
5b) has an outgoing path (20) (21) on the inside surface in the left and right direction.
A groove (19) is formed, and the outer surface is flat.

The guide member (D) has two end cap parts (to)
(11) corresponds to the grooves (30) (31) and notches (32), and the upper and lower cylindrical surfaces (39) (40)
A semicircular groove (41) is formed between them. The radius of this groove (41) is the end cap part (10)
(11) is equal to the radius of the notch (32), and the radius of the upper and lower cylindrical surfaces (39) (40) constitutes the reversal paths (24) (25) of the end cap parts (10) (11). Groove (30) smaller than the radius of (31).

The moving block (4) is assembled as follows.

First, the end cap portion (10) of the first member (C1)
The guide member (D) has a groove (4) in the notch (32) of the guide member (D).
Fit the parts 1) together and attach the upper and lower cylindrical surfaces (39) (4
0) part to the vertical inversion path (24) (25) groove (
30) Insert into (31). This allows the guide member (D
) is flush with the inner surface of the end cap part 10) in the front and back direction, and the openings of the upper and lower grooves (30) and (31) of the end cap part (10) are aligned with the guide member. (D) and is blocked by the vertical reversal path (24) (
25) is formed. Similarly, the groove (41) of the guide member (D) is fitted into the notch (32) of the second member (C2) to form vertical reversal paths (24) and (25).

Next, attach the third member (C3) to the first member (C1),
Fix it in place with bolts etc. As a result, the core portions (15b) on both sides of the third member (C3) are connected to the first member (
It is inserted between the cage parts (15a) on both sides of C1) and the retainer (8) inside thereof, and the lower end of the core part (15b) fits into the groove (34) of the cage part (15a).
A portion of the connecting portion (18) extending outward from the core portion (15b) of the third member (C3) contacts the upper surface of the cage portions (15a) on both sides of the first member (C1).

Further, one end surface of the third member (C3) comes into contact with one end surface of the end cap portion 10) of the first member (C1) and the flat surface (42) of the guide member (D) fitted therein, The other end surface of the third member (C3) and the end surfaces of the cage portion (15a) of the first member (CI) and the cage (8) are flush with each other. Then, the flat surface on the outer side in the left-right direction of the core portion (15b) comes into contact with the inner surface of the cage portion (15a), thereby closing the opening of the groove (2g) (29). (22) and (23) are formed. In addition, a cage (8
) is located in the groove (19) of the core portion (15b), forming upper and lower outgoing paths (20) and (21).

Next, the ball circulation path (5) formed in this way
(8) Reverse path (24) (25) at one end, outward path (20
) (2■) and the return trip (22) (23) with the ball (
7) Enclose.

Next, the remaining balls (7) are put into the reversing paths (24) (25) of the second member (C2), and this second member (C2) is held together with the cage part (15a) of the first member (C1). vessel(
8) and the end surface of the third member (C3), and fix with bolts or the like at appropriate locations to complete the assembly. As a result, the cage portion (15a) of the first member (C1) and the protrusions (35) (36) of the retainer (8) are connected to the second member (C1).
C2), the end surface of the cage portion (15a) contacts the end surface of the second member (C2), and the end surface of the cage portion (15a) contacts the end surface of the second member (C2).
) and the flat surface (42) of the guide member (D) fitted therein. Both ends of the vertical reversal path (24) (25) formed in the second member (C2) are connected to the forward path (20) (21) formed by the first member (C1) and the third member (C3). It communicates with the return paths (22) and (23) to form upper and lower ball circulation paths (5) and (8). At this time, the protrusion (3B) of the retainer (8) is connected to the second member (
The retainer (8) is positioned simply by fitting it into the recess (38) of C2), and there is no need to fix the retainer (8) with bolts or screws.

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 sectional view taken along the line n-tt in FIG. 1, and FIG. 3 is a sectional view taken along the line ■-■ in FIG. 1. Figure 4 is a sectional view taken along the line IV-IV in Figure 1, Figure 5 is a sectional view taken along the line V-V in Figure 1, Figure 6 is a sectional view taken along the line Vl-VI in Figure 1, and Figure 7 is a cross-sectional view taken along the line Vl-VI in Figure 1. FIG. 3 is an exploded perspective view of the dynamic guide device. (A)...Guide rail, (B)...Moving object, (C
1)...first member, (4)...moving block, (5
) (6)... Ball circulation path, (7)... Ball, (
8)... Cage, (10) (11)... End cap part, (12)... Intermediate part, (13) (14)
(L5)... Leg (leg-shaped part), (15a) =
- Cage part, (20) (21)... Outward journey, (22
) (23)... Return trip, (24) (25>... Reverse trip. Figure 2 Figure 3 Figure 4 Figure 6

Claims (1)

[Claims] It consists of a linear guide rail and a movable body that moves astride the guide rail, and the movable body is composed of a movable block whose cross section is approximately inverted U-shaped and which has annular ball circulation paths on both leg-like portions, and a movable body that moves astride the guide rail. Consists of multiple balls that circulate in the ball circulation path of the block and roll between the guide rails.
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. A groove-shaped outward path is formed as shown in FIG. In a direct acting guide device consisting of a connecting reversing path, an end cap portion at one end of the moving block, a portion of the leg-like portions on both sides of the intermediate portion outside the return path of the ball circulation path, and a portion of the retainer. A direct-acting guide device characterized by being integrally formed with.