JPS63172013A - Infinite sliding bearing - Google Patents

Abstract

PURPOSE:To secure smooth sliding of the bearing in the caption by putting sliding bearing pieces in a cut on X bearing of a main body so that a guide rail may be guided. CONSTITUTION:A bearing 1 is attached to an objective equipment by using a mounting hole 15 which is an inner hole of a hollow rivet 8 for forming a housing 2. The cross section of a guide rail 20 is a hexagon, and every sliding bearing piece 10 is brought into contact with the three surfaces, divided equally, of the guide rail 20 so as to be supported by the guide rail 20 and guided to slide. Every sliding bearing piece 10 performs sliding support with respect to the guide rail 20. Accordingly, by selecting the material of the bearing pieces, it stands a large load so that a smooth sliding can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application: The present invention relates to a bearing capable of supporting a sliding type infinite movement guide.

BACKGROUND OF THE INVENTION Linear guide bearings are often used as sliding guide elements used to linearly move equipment and the like along guide rails. The most common type of bearing is a plain bearing made from a bearing base metal or synthetic resin. This type can mainly be used for shafts with a circular cross section, but it is rarely used these days because its lubricity is often restricted due to oil supply, etc., and because it has high frictional resistance. It has become.

As a rolling bearing to replace these types of bearings,
A bearing with a large number of balls arranged inside a housing via a retainer so that it can rotate in a fixed position (a sleeve-type bearing with built-in balls). Alternatively, a slide bearing unit has been developed in which a plurality of grooves are appropriately distributed on the guided and supported side so that the balls can be transferred, and the bearing side is housed in a retainer so that the balls can be transferred in a circular manner. , has become widely used. It is a type of structure that has a relationship between a spline shaft and its fitting support part. If such a transfer ball is incorporated, the frictional resistance during movement will naturally be reduced and smooth operation will be possible, but the guide shaft or guide rail for the bearing must have a special shape. There is. In particular, the guide grooves of this transfer ball have various problems in their distribution, machining accuracy, etc., and the general drawback is that the machining costs are high. Of course, it is well known that in addition to balls, devices in which rollers are arranged in the same manner have also been proposed, and some of these have been put into practical use. These are well known, for example, in the catalogs of NSK Ltd., NTN Toyo Bearing Co., Ltd., Nippon Thomson Co., Ltd., and THK Corporation.

However, in linear motion bearings that incorporate transfer balls or transfer rollers using known technology, not only the structure of the bearing itself but also the guide surface of the related guide shaft or guide rail are elevated. Since it is required to be highly accurate, it is inevitable that it will be extremely expensive.

Therefore, the present inventor first formed a housing with a laminated structure of three types of plates, installed rotating rollers in the required distribution inside the housing, and installed shafts or guides with a hexagonal cross-section and a desired cross-sectional shape. They have created a slide bearing that can be combined with a rail to easily improve accuracy and is extremely easy to manufacture, and several types are already in practical use. To give an example of these,
Publication No. 9-18509 (the dimensions correspond to a rail-type guide rail with a seat), Special Publication No. 1988-308
No. 48 (device for guiding and supporting a moving object using a guide shaft with a polygonal cross section), JP-A-55-129616, JP-A-55-159322, JP-A-56-1278
No. 17, Japanese Patent Application Laid-Open No. 58-13224, etc., bearings or linear motion bearing devices that allow the guide roller to rationally abut against the guide rail or guide support and move smoothly and precisely in a straight line are disclosed. It was developed.

These slide bearings or slide bearing devices according to the prior invention are cheaper than conventional bearings, and can operate smoothly due to their structure, but the internal rotating rollers are too close to the guide surface for many minutes. Therefore, the supporting means for the rollers needs to be processed simply but with high dimensional accuracy, and the press processing needs to be precise, which increases the cost accordingly. Also, since parts such as needle rollers will be used,
There is a tendency towards higher quality products, and if you try to get something cheaper, it will be impossible to make it. In addition, if the supporting load increases, the dimensions will increase, causing problems in terms of miniaturization.

Problems to be Solved: The present invention effectively utilizes the ease of mass production and structural simplicity of the bearing housing obtained by the prior invention to improve the machining accuracy of the main parts compared to the conventional one. To provide a highly functional infinite sliding bearing with a simple structure with a sliding bearing piece internally installed, which can achieve the purpose without any problems, can withstand high loads as a bearing, and can be provided at a low price. be.

Structure of the Invention: The present invention provides a linear sliding type bearing in which the housing is made up of at least two types of parts, and the main part has an opening with a required width relative to the surface to be slidably supported. ,
A required number of sliding bearing single support notches are provided, and these support notches are approximately symmetrical and have a T-shaped horizontal locking notch cut to an appropriate depth on both sides opposite to the opening. On the other hand, on both ends in the sliding direction, a lid body without a notch is arranged, and the lid body and the main body are integrally fastened with a fastener to form a housing, and the receiving support notch of the main body is connected to the main body. A sliding bearing piece whose base has a shape matching the notch and whose height is higher than the depth of the cut is fitted, and both ends in the sliding direction are fixed irremovably with a cover body. be.

In the present invention, the sliding bearing piece mounting portion of the housing is made to correspond to the conditions as a bearing, and in the case of a guide shaft (including a hollow shaft) having a rectangular cross section,
A hole similar in shape to the target axis is formed in the center of the housing (not necessarily the center), and a hole is formed on each side of this hole or on every other side (for triangles and squares, on each side; for hexagons, For a hexagonal shape, a sliding bearing piece is disposed on every other side, that is, equally divided into three or four sides.

Further, when the bearing portion is opened to the guided body or the guide body, the sliding bearing piece is mounted so as to be perpendicular to the portion facing the sliding guide surface.

The most typical example of the present invention is that the bearing housing is made by laminating a required number of main plates having an appropriate thickness and equally provided with sliding bearing support notches and fastening holes at required positions. A sliding bearing piece with a length that almost matches the total thickness of this laminate is constructed by inserting the base into the support notch of the main body, placing lids on both ends, and fastening them together with hollow expansion rivets. do.

In this case, the laminated plate of the housing can be made of green wood by laminating relatively thin plates of equal thickness to a required size, and a composite plate with high strength can be obtained by laminating.

Furthermore, when reducing the number of laminated sheets, it is possible to reduce the weight and increase the strength by appropriately distributing different materials as necessary.

In the present invention, the pond may have a structure in which the main body of the bearing housing is one block, and lids are attached to both outer ends in the sliding direction. This case is suitable when it is necessary to cover a small item or a relatively large or long item with one unit. As the main body of the housing, it is preferable to use a deformed material in which a bearing support notch and a hole are formed by drawing. In the case of small size, a mold may be used.

In addition, in the case of a type of bearing that penetrates through the housing and supports the guide shaft, if the shaft size is large, double rows of sliding bearing single support notches are provided on each side of the support, A bearing piece may be fitted in each to correspond to each other.

As mentioned above, the sliding bearing piece used in the present invention has a height that is longer than the depth dimension of the support notch provided on the housing side, and the length is usually such that both ends are held by the lid body. The dimensions shall be approximately equal to the length (in the sliding direction). When the length of the housing becomes longer, a plurality of bearing pieces may be arranged in series and fitted.

Also, this sliding bearing piece can be used depending on its intended use. '
) can be used selectively. Generally, they are sintered alloys, synthetic resins with high mechanical strength and lubricity (for example, polyamide resins), ceramics, and the like.

Of course, the housing can be made of various metals, synthetic resins, 2t''L
A complex of these can be used. Further, the outer shape of the housing is not particularly limited. It can be made into any size and shape depending on the location and purpose of use, and <V
If necessary, it can also be adopted in units 1 to 1 in which a sliding bearing piece is provided on the circumferential portion of the housing for guiding movement. For example, it is shaped like a piston.

Embodiments: The present invention will be described in detail below with reference to embodiments.

The bearings shown in FIGS. 1 to 5 are typical bearings of the present invention, and the bearing (1) has a hexagonal insertion hole forming part (4) in the center as shown in FIG. , radially T-shaped bearing support notches (5) were equally divided into three sides of this insertion hole forming part (4), and fastening holes (7) were equally divided in the four corners. A main body (2)' formed by laminating a plurality of main body plates (3) of appropriate thickness: A hexagonal insertion hole forming part (4)' is provided in the center as shown in Fig. 4, and fastened at the four corners. A lid body (6) with a thickness of 3
) and a plurality of sliding bearing pieces (10) that are fitted and supported in the bearing piece support grooves (5a) formed by the respective notches (5) of main plate #: (2)'. (3) Insert the hollow expansion rivet 1- (8) into the fastening hole (7X7)' provided in the common position of the laminated part and the side cover body (6) and fasten the housing ( 2).

As shown in the figure, each support notch (5) of the main plate (3) is provided with symmetrical horizontal notches (5)'(5)'' on both sides opposite to the opening, and T-shaped. The bearing piece (10) is formed into a shape, and the eight notches (5)'(5)' serve to prevent the bearing piece (10) from coming off during assembly.

The fastening hole (7)' of the lid body (2)'' is counterbore (7)'' on the side that will be the surface during assembly so that the caulked part of the hollow rivet (8) can fit therein.

These main plate (3) and lid body (6) are formed of metal plates, and if necessary, synthetic resin plates and other materials are used in combination.

The sliding bearing piece (lO) is a block body as shown in FIG. , horizontal notches (5)' provided on both sides), and the height h that slightly protrudes from the opening end.
As shown in FIG. 1, the dimensions are set in advance so that when it is assembled into the housing (2), it comes into contact with three surfaces of the target guide rail (see FIG. 2).

A flange (11) (11) is formed on the base end side to fit into the horizontal notch (5)'(5)'. This is made of a sintered alloy molded and impregnated with oil. Depending on the purpose, it is also possible to use polyamide resin, a synthetic resin with lubricity, or a material molded from ceramics. The length I of this bearing piece (10) is set to approximately match the overall thickness of the main body (2)', so that when assembled, both front and rear ends are pressed and fixed by the lid (6). I'll keep it.

The bearing (1) configured in this way has a housing (
2) Make the internal hole of the hollow rivet (8) into a hole (15) and attach it to the target equipment body or moving body, and use a hexagonal cross section for the guide rail (2o). Then, each sliding bearing piece (10) comes into contact with three equally divided surfaces of this guide rail (2o), and is supported by or supported by the guide rail (20) for sliding guidance. (See Figures 1 and 2).

Each sliding bearing piece (1o
) is in contact with the entire bearing end face for sliding support, so by selecting the material of the bearing piece, it is possible to withstand large loads and slide smoothly. Each of the bearing pieces (10) is held in the housing (2) by the lids (6) (6) at both ends against the sliding force in the axial direction, so it is fixed and does not suffer from any force. There is no problem.

Since the bearing of the present invention has a housing made of a laminated plate, it can be easily mass-produced by punching, laser beam cutting, etc., and products of various sizes can be easily manufactured. Also, since it uses a laminated structure, it has higher strength than one that is integrally molded or machined from a block body, and it is possible to reduce the weight of the housing by selecting the material accordingly.

In addition to the above-mentioned actual hffz example, as shown in FIG.
In the same manner as in the previous embodiment, insert the sliding bearing single support notch (5) into the insertion hole (4a) corresponding to the guide rail (20) on three sides (in this specific example, since the guide rail has a hexagonal cross section). Therefore, in the case of the cross-sectional shape of a pond, it is only necessary to provide it on each required side corresponding to the cross-sectional shape of the pond.
The main plate (3) has fastening holes (7) in the four corners and multiple auxiliary fastening holes (7)"(7)" in other required locations.
)' are laminated in the required number, and a sliding bearing piece (10) similar to that shown in the above embodiment (hereinafter the same) is fitted into each of the bearing notches (5), and a lid is made in the same manner as in the above embodiment. Hollow rivet (8) and regular rivet (8)'
(Bolts may also be used). The same parts as in the previous embodiment are denoted by the same reference numerals (the same applies hereinafter).

With this configuration, it can be used as a bearing for a relatively large guide rail.

Furthermore, as an example of the pond, the outer shape of the housing tank 2B) as shown in FIG. 7 can be made into a cylindrical shape. In this way, by increasing the accuracy of the outer diameter of the housing (2B), the housing (2B) can be used by being inserted into a hole drilled in a device or the like to which it is attached.

In addition to the outer shape, the sliding bearing piece (10)' is provided with a recess (13) in the middle part as shown in the figure, and the bearing surface (12)
) can also be used by floating a part of it. In this way, the sliding bearing piece can be modified into various sizes and shapes without changing its basic shape.

The one shown in Fig. 7 above is a bearing that supports a guide rail or shaft with a square cross section, but as shown in Fig. 10, it can be used as a bearing (1) that supports a normal shaft (21) with a circular cross section. can also be adopted. The basic shape of each part is the same as above, and the bearing support surface (12') of the sliding bearing piece (10) is formed into a concave arc shape, and the shaft (21) is If the number of sliding bearing pieces (10) is increased, the number of sliding bearing pieces (10) can be increased. can also be adopted.

Furthermore, the bearing of the present invention has a laminated structure housing (2C) having an open guide rail receiving part (14) as shown in FIG. 8, and a correspondingly separate laminated structure housing (2C). 2D) and a sliding bearing piece (10
) as shown in the diagram, and the guide rail receiver is inserted into the slot 1.
It can also be used in a configuration in which the guide rail (22), which is inserted into the guide rail (22), is abutted and supported by the sliding bearing pieces (10) (10) (10) and is slidably guided.

Furthermore, the structure shown in FIG. 9 can be used as a bearing (1)' for supporting a part of a corner of a guide rail (23). According to this type, it can be adopted even when guiding a guide part such as a hexagonal cross section, and of course it can be used even when the distance between the bearings (1)'(1)' disposed opposite to each other is wide.

The example shown in FIG. 11 is a bearing (IA) that slides and guides a flat surface, and shows that it can also be applied to a bearing like the one shown in the figure.

All of the above has been shown for a laminated structure, but based on the purpose of the present invention, the main body of the housing is a block body, and the guide rail insertion hole or guide rail receiver is formed by inserting the insertion part and each sliding bearing single bearing support. Cut the material 1") which has been drawn or cut into grooves into the required dimensions, fit the sliding bearing pieces into each of the bearing support notches, and close both ends with lids to create a laminated structure. It can be used in the same way even if constructed in the same manner as in the case of .When using such a block-shaped housing, there is an advantage that the side surface of the housing can be used to fix the device to an object in the pond with screws.

In addition, when this block body is used, the length of the bearing can be increased, and multiple sliding bearing pieces can be inserted and installed in series within a single bearing support groove. This is useful when it is necessary to support a guide rail (shaft) in a long section.

Further, according to the present invention, the housing has a shape just like a cylinder piston, and at least three
If a single bearing support groove is formed at each location, a sliding bearing piece is fitted into each of the bearing support grooves, and the front and rear ends are fixed with a cover body (also called a holding plate). good.

In addition, it is also possible to provide a unit type bearing in which a plurality of bearings having the above structure are provided on one board (frame), and the structure of the main parts thereof falls within the technical scope of the present invention.

Effects of the invention: According to the present invention, the drawback of conventional sliding bearings, which had a large frictional resistance and were difficult to use due to their unit structure, has been solved, and rolling bearings and bearings with built-in rollers have high impact resistance. This solves the problem of poor durability and the large size required to create something that can withstand this.It has a simple structure, has excellent impact resistance, abrasion resistance, and durability, and has a structure that can be easily mass-produced, so it can be used in all fields. This made it possible to reasonably obtain a bearing that could withstand use underwater, which was the biggest drawback of rolling bearings. Of course, it can be provided at a low price.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of an embodiment of the bearing of the present invention, Fig. 2 is a central vertical sectional view of Fig. 1, Fig. 3 is a view showing the main plate forming the housing, and Fig. 4 is the lid. Figure 5 is a perspective view of an example of a sliding bearing piece to be incorporated;
FIGS. 6 to 11 are diagrams showing examples of ponds. (1) (1)' (IA)...Bearing (2) (
2A) (2B) (2C)...Housing (2)'
... Main body of the housing (3) (3) ... Main body play 1-(4) (4') ... Insertion hole forming part (4a)
...Insertion hole (5) ...Bearing single support notch (5a)
...Bearing single bearing support groove (6)...Lid body (
7) (7')... Fastening hole (8)... Hollow rivet (11)... Flange Qo)Qn)' (1
0)”...Sliding bearing piece (12) (12')...
・Supporting surface (14)...The guide rail receiving part (15)
)...Mounting hole (21)...Shaft (20) (
22)...Power idle rail first part 4 Figure 9 item 7n'' 811 block Figure 10

Claims (1)

[Claims] In the infinite sliding type bearing, the housing consists of at least two types of parts, and the main part has a sliding bearing single support notch that opens with the required width relative to the sliding bearing surface. The required number of support notches are provided on both sides opposite to the opening, and the locking notches are approximately symmetrical and are cut laterally in a T-shape to an appropriate depth. A lid body without a notch is disposed on both outer sides, and the lid body and the main body are integrally fastened with a fastener to form a housing, and the receiving support notch of the main body is
An infinite slide characterized in that a sliding bearing piece whose base has a shape that matches the cut and whose height is higher than the cut depth dimension is fitted, and both ends in the sliding direction are fixed irremovably with a cover body. bearing.