JP2004124957A - Movement guide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movement guide device capable of sharing an inner seal member and an outer seal member. <P>SOLUTION: The inner seal member 21 and the outer seal member 22 are mounted between a surface 1e of a raceway rail 1 and a surface 2c of a moving block 2 opposite to the surface 1e. A clearance between the surface 1e of the raceway rail 1 and the surface 2c of the moving block 2, where the inner seal member 21 and the outer seal member 22 are mounted, is approximately evenly set to share the inner seal member 21 and the outer seal member 22. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rolling motion guide device that guides a linear motion or a curved motion of a guide target, and more particularly to a motion guide device that can seal a gap between a track member and a moving member.
[0002]
[Prior art]
The motion guide device is a track-like movement that is assembled so as to be slidable along the track rail via a plurality of rolling elements such as balls and rollers, and a plurality of rolling element rolling grooves extending in parallel. And a block. The moving block is formed with a plurality of load rolling element rolling grooves extending in parallel to and facing the rolling element rolling grooves of the track rail. Between the rolling element rolling groove of the track rail and the rolling element rolling groove of the moving block, a plurality of rolling elements that make rolling motion are interposed.
[0003]
Such exercise guide devices have come to be used in various environments with the spread. Recently, the use in a harsh environment where water-soluble coolant and fine powder are applied to the motion guide apparatus has been increasing. In such a harsh environment, the motion guide device may be damaged early due to insufficient lubrication or entry of foreign matter.
[0004]
For this reason, as shown in FIG. 8, the applicant of the present application has proposed a motion guide device including a seal member that prevents leakage of a lubricant filled in the interior and intrusion of foreign matter from the outside (for example, Patent Document 1). reference).
[0005]
The seal members include outer seal members 32 and 32 attached to the lower side surface 31 a of the moving block 31 and inner seal members 34 attached between the plurality of load rolling element rolling grooves 33. The outer seal members 32 and 32 prevent foreign matter and moisture entering from the lower side surface of the moving block 31, and prevent the lubricant from leaking from below the moving block 31. On the other hand, the inner seal member 34 prevents the foreign matter that has entered the moving block 31 from the rail mounting holes or the like from entering the load rolling element rolling grooves 33 of the moving block 31, and applies lubricant to the load rolling element rolling grooves 33. Hold on.
[0006]
[Patent Document 1] Japanese Patent Application Laid-Open No. 11-280760
[Problems to be solved by the invention]
However, the positions where the inner seal member 34 and the outer seal members 32 and 32 are attached are different, that is, the outer seal members 32 and 32 are attached to the lower side surface of the moving block 31 formed in a bowl shape. The inner seal member 34 is attached between the lower surface of the central portion of the moving block 31 and the upper surface of the track rail. Moreover, the space in which the inner seal member 34 and the outer seal members 32 and 32 are attached is also different. For this reason, the inner seal member 34 and the outer seal members 32, 32 have been designed separately and independently so that they can be easily attached to the moving block. For this reason, it is necessary to manufacture and modify the mold separately from the inner seal member 34 and the outer seal members 32, 32, and it takes cost and time to manufacture them.
[0008]
Then, an object of this invention is to provide the motion guide apparatus and seal member which can share an inner side seal member and an outer side seal member.
[0009]
[Means for Solving the Problems]
The present invention will be described below. In order to solve the above problems, the present inventor arranges the inner seal member and the outer seal member between the surface of the track member and the surface of the moving member facing the surface, and the surface of the track member and the moving member. The gap between the surfaces was set approximately equal so that the inner seal member and the outer seal member could be shared.
[0010]
Specifically, the present invention comprises a race member formed with a plurality of rolling element rolling portions extending in parallel, and is assembled to the race member so as to be slidable relative to the race member. A saddle-like moving member formed with a plurality of load rolling element rolling parts facing and parallel to the rolling element rolling part of the race member, the rolling element rolling part of the race member and the moving member A plurality of rolling elements interposed between the rolling element rolling sections, and an inner peripheral side of the moving member facing the raceway member and between the plurality of load rolling element rolling sections. An inner seal member that is attached along the rolling element rolling part and prevents foreign matter from entering the loaded rolling element rolling part; and an inner peripheral side of the moving member that faces the track member, and the plurality On the outer side of the rolling rolling element rolling section of the strip. And an outer seal member that prevents foreign matters from entering the load rolling element rolling portion, and the inner seal member and the outer seal member include a surface of the track member, and the track. The clearance between the surface of the track member and the surface of the moving member, which is disposed between the surface of the moving member facing the surface of the member and parallel to the surface and where the seal member is disposed, The above-described problem is solved by a motion guide device characterized by being substantially equal so that the inner seal member and the outer seal member can be shared.
[0011]
In a preferred aspect of the present invention, the inner seal member and the outer seal member have a base portion attached to the moving member, and a lip portion that is connected to the base portion and contacts the surface of the track member. The base portion is bent at both ends thereof in a direction perpendicular to the surface of the track member with which the lip portion contacts, and the moving member is sandwiched between the both ends of the bent base portion to thereby seal the seal. A member is attached to the moving member.
[0012]
According to this invention, an inner side sealing member and an outer side sealing member can be arrange | positioned between the surface of a track member and the surface of a moving member parallel to this surface.
[0013]
Furthermore, in a preferred aspect of the present invention, the seal member is provided with a connecting portion that connects the base portion and the lip portion, and the connecting portion bends so that the lip portion is a surface of the track member. It can be displaced in a direction orthogonal to
[0014]
In order to solve the above-mentioned problems, the present invention is assembled to a raceway member in which a plurality of rolling element rolling portions extending in parallel are formed, and to the raceway member so as to be relatively slidable along the raceway member. A saddle-like moving member formed with a plurality of load rolling element rolling parts extending in parallel and facing the rolling element rolling parts of the plurality of raceway members; and the rolling element rolling part of the raceway member And a plurality of rolling elements interposed between the rolling member rolling parts of the moving member, and a seal member for a motion guide device, the seal member extending along the load rolling element rolling part is A base portion attached to the moving member; and a lip portion connected to the base portion and in contact with the surface of the raceway member, wherein the base portion is orthogonal to the surface of the raceway member in contact with the lip portion. Folded in the direction to be folded By sandwiching the movable member in the opposite ends of said base portion, said sealing member is equal to or attached to the moving member.
[0015]
Furthermore, in a preferred aspect of the present invention, the seal member is provided with a connecting portion that connects the base portion and the lip portion, and the connecting portion bends so that the lip portion is a surface of the track member. It can be displaced in a direction orthogonal to
[0016]
According to this invention, it becomes easy to arrange | position an inner side sealing member and an outer side sealing member between the surface of a track member and the surface of a moving member parallel to this surface.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a linear motion guide apparatus according to a first embodiment of the present invention. This linear motion guide apparatus includes a track rail 1 as a track member extending in a straight line and a moving block 2 as a bowl-shaped moving member assembled so as to be slidable relative to the track rail 1. Yes. Between the track rail 1 and the moving block 2, a large number of rollers 3 as rolling elements capable of rolling motion are interposed.
[0018]
The track rail 1 is formed in a substantially square cross section. On the left and right side surfaces of the track rail 1, grooves 1a having wall surfaces 1b, 1b and a bottom surface 1c are formed along the longitudinal direction. Both wall surfaces 1b and 1b of the groove 1a intersect at an angle of 90 degrees. Each of the upper wall surface 1b and the lower wall surface 1b is a roller rolling surface as a rolling element rolling portion on which the rollers 3 roll. On the left and right side surfaces of the track rail 1, a total of four roller rolling surfaces 1b are formed, two on the top and the bottom, and these roller rolling surfaces 1b extend in parallel with each other.
[0019]
The moving block 2 includes a central portion 2a facing the upper surface of the track rail 1 and side wall portions 2b and 2b extending downward from both the left and right sides of the central portion 2a and facing the left and right side surfaces of the track rail 1, and are entirely It is formed into a shape. The moving block 2 includes a pair of steel block main bodies 4, a resin circulation path molded body incorporated in the block main body 4, and a pair of end faces in the moving direction of the block main body in which the resin circulation path molded bodies are incorporated. Side lids 5 and 5 are provided. On the side wall portions 4b and 4b of the block main body 4, projecting portions 4c and 4c having shapes matched to the grooves 1a provided on the side surface of the track rail 1 are formed. Two protruding roller rolling surfaces 4d and 4d are formed on the protruding portions 4c and 4c as load rolling element rolling portions facing the roller rolling surfaces 1b and 1b. The load roller rolling surfaces 4d, 4d are provided in total on the top and bottom of the left and right side wall portions 4b, 4b of the block body 4 in a total of four, and the load roller rolling surfaces 4d ... extend in parallel with each other.
[0020]
The side walls 2b and 2b of the moving block 2 are provided with two upper and lower roller escape passages 7 and 7 provided parallel to the two upper and lower load roller rolling surfaces 4d and 4d at a predetermined interval, and the load roller rolling. A U-shaped direction changing path for circulating the rollers 3 by connecting both ends of the surfaces 4d, 4d and the roller escape passages 7, 7 is provided. These load roller rolling surfaces 4d, the direction changing path, and the roller escape path 7 constitute a roller circulation path. A total of four roller escape passages 7 are provided above and below the left and right side wall portions 2b, 2b of the moving block 2, respectively. The direction change path connects the upper load roller rolling surface 4d and the lower roller escape passage 7 and the lower load roller rolling surface 4d and the upper roller escape passage 7 so as to cross three-dimensionally. Yes. A total of four roller circulation paths are formed on each of the left and right side wall portions 2b, 2b. Each roller circulation path is formed in one plane, and the rollers 3 circulate two-dimensionally in each roller circulation path. Further, the plane on which one roller circulation path is located and the plane on which the other roller circulation path is located are orthogonal to each other, and one roller circulation path is disposed on the inner peripheral side of the other roller circulation path.
[0021]
The rollers 3 are connected in series through a roller holding band 10 as a rolling element holding band, and circulate in the roller circulation path while being held by the roller holding band 10. The roller holding band 10 includes a flexible belt provided with a roller hole into which each roller 3 is inserted, and a spacer interposed between the roller 3... And the roller 3. The part protrudes outward from both ends in the axial direction of the rollers 3.
[0022]
The resin circulation path molded body extends along both side edges of the load roller rolling surfaces 4d, 4d, and when the moving block 2 is removed from the track rail 1, the rollers 3 ... drop off from the load roller rolling surfaces 4d, 4d. Holding members 11 and 11, escape passage constituting members 14 constituting roller escape passages, and direction changing path constituting members 8 constituting direction changing paths. The holding members 11, 11, the escape passage constituting member 14, and the direction changing path constituting member 8 are each molded separately from the block body 4 and separately from each other, and are incorporated into the block body 4.
[0023]
The escape passage constituting member 14 is composed of a pair of pipe halves 14a and 14b obtained by dividing a pipe into two in a direction orthogonal to the axial direction. Each of these pipe halves 14a and 14b includes a groove that matches the shape of the rollers 3 along the longitudinal direction, and a guide groove that guides the side edge of the belt.
[0024]
The side cover 5 has a cross-sectional shape that matches that of the block body 4 and includes a central portion 5a and side wall portions 5b and 5b. The side wall portions 5b and 5b are formed with outer peripheral guide portions of the roller circulation path on the outer peripheral side. Moreover, the direction change path structure members 8 and 8 are integrated in the side wall parts 5b and 5b. The side lids 5 and 5 are attached to both ends of the block body 4 in the moving direction. The side lids 5 and 5 are fastened and fixed to the block body 4 by inserting bolts into the bolt insertion holes formed in the side lids 5 and 5 and screwing the bolts into the screw holes formed on the end surface of the block body 4. .
[0025]
Lubricant supply plates 12 and 12 for supplying the lubricant to the load roller rolling surface of the block body 4 are provided inside the side lids 5 and 5.
[0026]
End plates 13 and 13 are attached to the outside of the side lids 5 and 5 (that is, both end surfaces in the moving direction of the moving block). The end plates 13 and 13 are also provided with a central portion 13a and side wall portions 13b and 13b in accordance with the cross section of the block body 4. The end plates 13 and 13 are attached to the side lids 5 and 5 by screws. A seal portion 13c is provided at the periphery of the inner portion of the end plates 13, 13 that faces the track rail 1. The end plates 13, 13 prevent foreign matter or moisture adhering to the upper and side surfaces of the track rail 1 from entering the moving block 2 and block the leakage of the lubricant inside the moving block 2.
[0027]
FIG. 2 shows a front view of the motion guide apparatus with the end plate 13 removed. On the inner peripheral side of the moving block 2 facing the track rail 1 and between the upper load roller rolling surfaces 4d and 4d (in this embodiment, the lower surface 2c of the central portion 2a), the load roller rolling surface is provided. An inner seal member 21 extending along 4d is attached. Further, on the inner peripheral side of the moving block 2 facing the track rail 1 and on the outer side between the lower load roller rolling surfaces 4d and 4d (in this embodiment, below the side wall portion 2b), the load roller An outer seal member 22 extending along the rolling surface 4d is attached. Both ends of the inner seal member 21 and the outer seal member 22 are abutted against the seal portions 13c of the end plate 13 attached to both ends of the moving block 2.
[0028]
The outer seal member 22 prevents foreign matter, moisture, and the like entering from the lower side surface 2d of the moving block 2 and prevents the lubricant from leaking from below the moving block 2. The outer seal member 22 is particularly necessary when, for example, the motion guide device is used upside down. The inner seal member 21 moves when a small amount of foreign matter or dust that cannot be prevented by the end plate 13 has entered the moving block 2 (for example, when foreign matter has accumulated in the mounting hole 1d of the track rail 1). The load roller rolling surface 4d of the block 2 is prevented from entering, and the lubricant is held on the load roller rolling surface 4d.
[0029]
In the present embodiment, the inner seal member 21 and the outer seal member 22 have the same structure, and the inner seal member 21 and the outer seal member 22 are shared. The shared seal members 21 and 22 are disposed between the surface 1e of the track rail 1 and the surface 2c of the moving block 2 facing the surface 1e of the track rail 1 and parallel to the surface 1e of the track rail 1. Is done.
[0030]
FIG. 3 shows seal members 21 and 22 to be shared. (A) in the figure shows a front view, (B) in the figure shows a plan view, and (C) in the figure shows a side view of the longitudinal direction of the seal member. The sealing members 21 and 22 are formed by bonding or baking a rubber or plastic lip portion 24 to a core glass 23 formed by bending a metal plate formed in a predetermined shape with a press or the like. The core 23 may be molded from resin, and when the core is resin, the lip portion 24 may be molded in two colors.
[0031]
The core rod 23 has a plate-like base portion 25 attached to the surface 2c of the moving block 2, and is bent into an L-shaped cross section from the base portion 25 toward the surface 1e of the track rail 1, and the base portion 25 and the lip portion. 24 is formed. By bending the connecting portion 26 like a leaf spring, the lip portion 24 can be slightly displaced in a direction perpendicular to the surface 1 e of the track rail 1. Both ends in the longitudinal direction of the base portion 25 are bent in a direction perpendicular to the surface 1e of the track rail 1 with which the lip portion 24 contacts. Recesses 28 (see FIG. 2) corresponding to both end portions 27 of the base portion 25 are formed on the side wall 2b of the moving block 2. The sealing members 21 and 22 are attached to the moving block 2 by fitting the bent ends 27 and 27 into the recesses 28 and 28 of the side lid 5 and sandwiching the moving block 2 between the both ends 27 and 27. In the state where both end portions 27 are fitted in the recesses 28 of the side cover 5, the seal members 21 and 22 can be slightly displaced in the direction perpendicular to the surface 1 e of the track rail 1. Both end portions 27 and 27 of the seal members 21 and 22 are sandwiched between the side lid 5 and the end plate 13 attached to the side lid 5 so that the seal members 21 and 22 can be securely attached to the moving block 2. It is.
[0032]
The lip portion 24 that contacts the surface 1e of the track rail 1 has a length substantially equal to the length in the longitudinal direction of the core rod 23, and both ends in the longitudinal direction of the lip portion 24 project against the seal portion 13c of the end plate 13. Hit. A portion of the lip portion 24 that contacts the surface 1e of the track rail 1 is formed in an arc shape in cross section. Since the lip portion 24 makes long contact with the track rail 1 in the sliding direction of the moving block 2, the sliding resistance increases when the pressure in contact with the track rail 1 is increased. In order not to increase the sliding resistance, the connecting portion 26 bends like a leaf spring.
[0033]
4 shows a front view of the linear motion guide apparatus with the seal members 21 and 22 removed, and FIG. 5 shows a front view of the linear motion guide apparatus with the seal members 21 and 22 attached. The clearance between the surface 1e of the track rail 1 and the surface 2c of the moving block 2 where the seal members 21 and 22 are disposed is set equal to δ so that the inner seal member 21 and the outer seal member 22 can be shared. The The gap δ only needs to be equal to the extent that the inner seal member 21 and the outer seal member 22 can be shared, and does not need to be exactly the same. This is because the lip portion 24 can be slightly displaced in the direction perpendicular to the surface 1e of the track rail 1 by bending the connecting portion 26 like a leaf spring as described above. In this embodiment, the gap between the surface 1e of the track rail 1 and the surface 2c of the moving block 2 between the upper and lower two load roller rolling surfaces 4d, 4d is also set to δ. Thereby, it becomes possible to arrange the sealing members 21 and 22 between the upper and lower two load roller rolling surfaces 4d and 4d.
[0034]
6 and 7 are front views of the linear motion guide apparatus according to the second embodiment of the present invention. Linear motion guide devices are used in various mounting postures and environments as they become popular. For this reason, in this embodiment, the inner side sealing member 21 and the outer side sealing member 22 are concentratedly attached to the location which wants to strengthen dust prevention. For example, a total of six inner seal members 21 are disposed between the upper load roller rolling surfaces 4d and 4d formed on the left and right sides, and two inner surfaces are disposed between the pair of upper and lower load roller rolling surfaces 4d and 4d. Seal members 21 and 21 are arranged, and outer seal members 22 and 22 are arranged below lower load roller rolling surfaces 4d and 4d formed on both the left and right sides. Moreover, the clearance gap between the surface 1e of the track rail 1 and the surface 2c of the moving block 2 is set equally, and the inner side sealing member 21 and the outer side sealing member 22 are shared.
[0035]
By using the inner seal member 21 and the outer seal member 22 in common, the seal members 21 and 22 can be attached anywhere except the load roller rolling surface 4d. Therefore, as in the present embodiment, a double specification in which the seal members 21, 21 are arranged in two rows, or a triple specification in which the seal members 21, 21, 21 are arranged in three rows can be easily manufactured.
[0036]
In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not change the summary of this invention. For example, in the above embodiment, the roller rolling surfaces 1b and 1b and the load roller rolling surfaces 4d and 4d are formed in a total of four strips, two on the left and right, but the number of strips varies depending on the type of linear motion guide device. Can be set. Further, not only the rollers 3 but also balls can be used as the rolling elements.
[0037]
In the above embodiment, the linear motion guide device in which the track rail extends linearly has been described, but the present invention can also be applied to a curved motion guide device in which the track rail extends in a curved shape.
[0038]
【The invention's effect】
As described above, according to the present invention, the inner seal member and the outer seal member are disposed between the surface of the track member and the opposed surface of the moving member facing the surface, and the inner seal member and the outer seal member are arranged. Since the gap between the surface of the track member and the opposed surface of the moving member is set to be approximately equal, the inner seal member and the outer seal member can be shared.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a linear motion guide apparatus according to a first embodiment of the present invention.
FIG. 2 is a front view of the linear motion guide apparatus with an end plate removed.
3A and 3B are diagrams showing a common seal member (A in the figure shows a front view, B in the figure shows a plan view, and C in the figure shows the longitudinal direction of the seal member. Shows a side view).
FIG. 4 is a front view of the linear motion guide device with an end plate and a seal member removed.
FIG. 5 is a front view of the linear motion guide device with a seal member attached.
FIG. 6 is a front view of a linear motion guide apparatus according to a second embodiment of the present invention (with an end plate removed).
7 is an enlarged view of a VII portion in FIG.
FIG. 8 is a front view showing a conventional motion guide device.
[Explanation of symbols]
1 ... Rail rail 1b ... Roller rolling surface (rolling element rolling part)
1e ... Track rail surface (surface of track member)
2 ... Moving block (moving member)
2c ... surface of moving block (surface of moving member)
3. Roller (rolling element)
4d: Load roller rolling surface (load rolling element rolling part)
21 ... Inner seal member (seal member)
22 ... Outer seal member (seal member)
24 ... Lip part 25 ... Base part 26 ... Connection part 27 ... Both ends delta ... Gap

Claims (5)

A track member in which a plurality of rolling element rolling parts extending in parallel are formed,
A plurality of load rolling element rolling portions are formed which are assembled to the race member so as to be slidable relative to the race member, face the rolling element rolling portions of the plurality of race members and extend in parallel. A bowl-shaped moving member to be
A plurality of rolling elements interposed between the rolling element rolling part of the track member and the rolling element rolling part of the moving member;
It is attached along the load rolling element rolling part on the inner peripheral side facing the track member in the moving member, and between the plurality of load rolling element rolling parts, and the load rolling element rolling part An inner seal member for preventing foreign matter from entering
It is attached along the load rolling element rolling part on the inner peripheral side facing the track member in the moving member and outside the space between the plurality of load rolling element rolling parts, and the load rolling element An outer seal member for preventing foreign matter from entering the rolling part or holding a lubricant,
The inner seal member and the outer seal member are disposed between the surface of the track member and the surface of the moving member facing the surface of the track member and parallel to the surface,
The movement guide, wherein the seal member is disposed, and the clearance between the surface of the track member and the surface of the moving member is substantially equal so that the inner seal member and the outer seal member can be shared. apparatus. The inner seal member and the outer seal member are
A base portion attached to the moving member;
A lip portion connected to the base portion and contacting the surface of the raceway member;
Both ends of the base portion are bent in a direction perpendicular to the surface of the track member with which the lip portion contacts,
The motion guide apparatus according to claim 1, wherein the seal member is attached to the moving member by sandwiching the moving member between the both ends of the bent base portion. The seal member is provided with a connecting portion that connects the base portion and the lip portion,
The motion guide device according to claim 2, wherein the lip portion can be displaced in a direction orthogonal to the surface of the track member by bending the connecting portion. A race member in which a plurality of rolling element rolling portions extending in parallel are formed, and a rolling member rolling portion of the plurality of race members assembled to the race member so as to be relatively slidable along the race member. Between the rolling member rolling part of the track member and the rolling member rolling part of the moving member, and a plurality of load rolling element rolling parts extending in parallel to each other and formed in parallel A plurality of rolling elements interposed between, and a seal member for a motion guide device comprising:
The seal member extending along the load rolling element rolling part,
A base portion attached to the moving member;
A lip portion connected to the base portion and contacting the surface of the raceway member;
The base portion is bent in a direction perpendicular to the surface of the raceway member with which the lip portion contacts,
The sealing member, wherein the sealing member is attached to the moving member by sandwiching the moving member between the both ends of the bent base portion. The seal member is provided with a connecting portion that connects the base portion and the lip portion,
The seal member according to claim 4, wherein the lip portion can be displaced in a direction perpendicular to the surface of the track member by bending the connecting portion.

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