JPS6235946Y2 - - Google Patents

Description

[Detailed explanation of the invention] "Industrial application field" This invention is a low-friction, high-precision application for linear motion parts of machines that require high-speed performance and precision, such as machine tools, industrial machines, and measuring instruments. The present invention also relates to a cage for a linear motion roller bearing having high rigidity.

The retainer in the present invention is composed of a retainer plate attached to the upper surface of the track base and a support plate attached to the lower surface.

``Prior Art'' As shown in FIGS. 13 and 14, a roller flat bearing 1 has an H-shaped main body 3 that supports loads from the sliding surfaces of various machines and equipment via punch-shaped rollers 2 and 6.
At both ends of the H-shaped main body 3, there are end caps 4, 4 for changing the direction of the rollers 2, 6, and guide members 5 for guiding and holding the rollers 2, 6. However, since the load rollers 6, 6... are lightly held by a single guide member (wire rod), if the rollers skew when entering the load area from the no-load area, the narrow part in the center There is a risk that the center of the roller in the load area will come into contact with the bend in the wire, which may impede the rotation of the roller and prevent smooth rotation.

"Problems to be solved by the invention" As mentioned above, instead of the punch-shaped rollers, rollers are arranged in two rows of transfer grooves on the track base, and the rollers are guided by a holding plate and guided on both sides of the transfer grooves. This is a linear motion roller bearing that allows for smooth guidance, and the unloaded rollers are completely sealed with a support plate to improve dust prevention, maintain good lubrication, and prevent noise between the rollers. Our goal is to provide retainers for

"Means for Solving the Problems" The technical means for solving the above-mentioned technical problems is to provide a track having upper and lower transfer grooves, and a direction changing end cap that connects the transfer grooves of the track. , a linear motion roller bearing comprising a holding plate in which a slit is formed on the upper surface of the way, and a bent portion for preventing the roller from falling off is formed in the longitudinal direction inside the slit, and a support plate is attached to the lower surface, The holding plate is formed with a pin hole that fits into the pin of the end cap,
Further, the front and rear ends are bent inward to fit into the stepped portion of the end cap to form a substantially inverted L-shaped bent portion, and the support plate has a slit formed in the center in the longitudinal direction. A retainer for a roller bearing for linear motion, characterized in that a pin hole is formed to fit into the pin of the end cap, and further the front and rear ends are bent upward to form a substantially L-shaped bent part.

"Operation" The load roller in the transfer groove formed on the track is smoothly guided by the holding plate, and is prevented from deviating from the transfer groove by the bending part formed parallel to the slit. The bends formed at the front and rear ends allow for accurate positioning on the track.

Furthermore, the no-load roller in the transfer groove is smoothly held by a support plate that guides and holds it.

In addition, the rollers inserted into the transfer grooves formed on the left and right sides around the entire circumference of the way are transferred while being guided by the transfer grooves, so that skewing is prevented and the rollers are inserted between the transfer grooves for no-load rollers on the way. Since the roller guide portion formed on the track base is formed on the same plane as both sides of the bottom portion, the vertical load received by the load roller is divided into three equal parts between the roller guide portion and both sides of the bottom portion of the track base.

"Example" Next, a preferred example of the present invention will be described based on the drawings. FIG. 1 is a plan view of a holding plate 400 attached to the upper surface of the track base 100.
0 punches slits 402, 403 that are somewhat shorter than the length of the roller 200 from a steel plate, and also forms bent portions 404, 405 in the inner longitudinal direction to prevent the roller 200 from falling off, and furthermore, both ends 406, 407.
Semicircular notches 408, 409 that match the bolt holes 105, 106 of the track base 100 and pin holes 410, 411 that fit into the pins 316, 317 of the end cap 301 are formed in the steel plate 4.
The front and rear ends of 00 are bent inward to form inverted L-shaped bent portions 401, 401. (See FIG. 2) FIG. 4 is a plan view of a support plate 500 attached to the lower surface of the track 100. The support plate 500 has a slit 501 formed in the center of the steel plate to be somewhat larger than the roller guide portion 111. , pin holes 502 and 503 that fit into the pins 318 and 319 of the end caps 301 and 302, respectively, are formed at the front and rear of the slit 501, and oil holes 504 are formed on the left and right sides of the slit 501, and further Fold the front and rear ends upward to form the bent part 5.
05,505 is formed. (See Fig. 5) Next, a holding plate 400 and a support plate 500 for guiding the cage, that is, the roller of the present invention.
Track base 100 and end cap 301
I will explain about it.

The track base 100 is horizontally parallel to its upper and lower surfaces,
In addition, two rows of transfer grooves 101, 102, 103, 1 that are slightly larger than the length of the roller 200 and have the same width.
04 is formed and the transfer grooves 101, 10
Of the transfer grooves 103 and 104 for the non-load roller 201, the transfer grooves 103 and 104 are formed slightly deeper than the diameter of the roller 200.
102 is formed slightly shallower than the diameter of the roller 200. (See FIG. 10) Reference numerals 105 and 106 are four bolt holes formed on the left and right sides of the track 100 for fixing the roller bearing to various machines, instruments, etc.

Reference numerals 107 and 108 denote internal threads for mounting hexagonal bolts 303 formed to attach end caps 301 and 302 for changing the direction of the roller 200 to the front and rear ends of the track base 100, and positioning seats are provided at the ends of the internal threads 107 and 108. Holes 109 and 110 are formed.

By forming no-load roller transfer grooves 103 and 104 on the lower surface of the track 100, a load support portion 111 and a bottom portion 112 are formed at the center.

The end cap 301 is composed of a guide block 304 and a semi-cylindrical guide piece 305, which are integrally formed of die-cast alloy or plastic in order to reduce the weight of the roller bearing.
4 are upper and lower, left and right transfer grooves 10 of the track base 100.
Direction changing grooves 306, 3 to match 1 to 104
07 is formed on the inner peripheral surface, and a partition wall 308 is formed in the center of the direction changing grooves 306, 307. (See FIGS. 11 and 12) Reference numeral 320 denotes a guide member integrally formed above the direction changing grooves 306 and 307, and scoops up the loaded roller 202 entering the end cap 301.

Reference numerals 309 and 310 refer to counterbores 109 and 11 for positioning the guide block 304 on the end face of the way platform 100.
an annular protrusion that fits into the protrusion 30;
9, 310 and the mounting bolt hole 311 concentrically,
312 is formed.

313, 314, 315 are guide blocks 30
The centers of the recesses 313, 314, and 315 are located on the same horizontal line, and the recesses have a first
A semi-cylindrical guide piece 305 as shown in FIG.
are fitted and fixed.

316 and 317 are direction change grooves 3 of the end cap 301 for fixing the holding plate 400.
This is a pin formed on the outside of 06,307.

Pins 318 and 319 are formed at the front and rear of the direction changing grooves 306 and 307 of the end cap 301, and fix the support plate 500.

Reference numeral 321 denotes a stepped portion formed at the upper rear end and the upper front end of the end cap 301.
The bent portion 401 of the holding plate 400 is fitted into the holding plate 400.

"Effects" When the retainer of the present invention is installed on the way as shown in Figures 7 and 8, the double rows of load rollers in the transfer grooves on the upper surface of the way are formed parallel to the slits in the retaining plate. The left and right bent portions prevent the holding plate from falling out of the transfer groove, and the bent portions formed in an inverted L shape at the front and rear ends of the holding plate enable accurate positioning on the track base.

In addition, the no-load roller in the transfer groove on the underside of the track is sealed by a support plate, which prevents dust from entering from the outside and has a dust-proof function that prevents lubricant oil from leaking in the transfer groove. .

Further, the support plate has a shielding effect of preventing sound generated by contact between rollers in the transfer groove from being transmitted to the outside.

In addition, the track base on which the cage of the present invention is attached has vertical and horizontal transfer grooves that guide the loaded and unloaded rollers, which are formed slightly larger than the length of the rollers, so that the rollers are prevented from skewing, and the track Since the roller guide portion of the platform bottom portion is formed on the same plane as both sides of the bottom portion, the vertical load received by the loaded roller is supported by the roller guide portion and both sides of the bottom portion, respectively, and it is possible to provide sufficient rigidity to withstand high loads.

Further, although the holding plate and the support plate are each formed from one steel plate, they are not limited to one piece, and it goes without saying that even if they are divided into two pieces, the same function and effect can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the holding plate of the present invention, FIG. 2 is a side view of FIG.
5 is a sectional view taken along the line B-B in FIG.
The figures are a sectional view taken along the line C-C in FIG. 6, FIG. 8 is a plan view of FIG. 6, FIG. 9 is a sectional view taken along the D-D line in FIG. 8, FIG. 10 is a side view of the track, and FIG. A is a vertical cross-sectional view of the guide block of the end cap for direction change attached to both ends of the track, FIG. 11 B is a front view of the guide piece to be assembled into the guide block, and FIG.
1A is a right side view, FIG. 13 is a longitudinal sectional front view of a known roller bearing, and FIG. 14 is a sectional view taken along the line E--E in FIG. 13. 100... Track base, 101-104... Transfer groove, 200... Roller, 301, 302... End cap for direction change, 400... Holding plate, 402, 403... Slit, 404, 40
5...Folding part for preventing falling off, 500...Support plate.

Claims (1)

[Scope of utility model registration request] A track base 1 having transfer grooves 101 to 104 on the upper and lower sides
00 and the transfer grooves 101 to 104 of the track 100
Direction change end cap 301, 3 to connect
02, and a slit 40 on the top surface of the track 100.
2, 403 are formed, and bent portions 404, 405 for preventing rollers from falling off are formed in the slits 402, 4.
Holding plate 4 formed in the inner longitudinal direction of 03
00 and a linear motion roller bearing with a support plate 500 attached to the lower surface, the holding plate 400 is attached to the end caps 301, 30.
Pin holes 41 that fit into the pins 316 and 317 of No. 2
0,411 are formed, and the front and rear ends are bent inward to fit into the step portions 321 of the end caps 301, 302 to form a substantially inverted L-shaped bent portion 401. 50
0 has a slit 501 formed in the center in the longitudinal direction, and pin holes 502 and 5 that fit into the pins 318 and 319 of the end caps 301 and 302.
A retainer for a roller bearing for linear motion, characterized in that a substantially L-shaped bent portion 505 is formed by bending the front and rear ends upward.