JPH0336736Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a roller bearing for linear motion used in linear motion parts of machine tools, office machines, measuring instruments, etc.

[Conventional technology]

Conventionally, this type of roller bearing for linear motion was actually developed.
Publication No. 60-73928, Japanese Utility Model Application Publication No. 59-166022, etc. are known.

This conventional structure alternately intersects the axis center and loads the
A plurality of cylindrical rollers arranged in an annular manner with an infinite circulation row consisting of a return row and a direction change row communicating between both ends of the rows, and a rolling groove that contacts the outer peripheral side of the cylindrical rollers at the load row position. and a retainer unit that exposes the outer periphery of the cylindrical rollers at the loaded row position and holds an infinitely circulating row of a plurality of cylindrical rollers, and the retainer unit has an infinite linear motion due to the infinitely circulating motion of the cylindrical rollers. It is designed so that it can guide you.

[Problem that the invention attempts to solve]

However, in the case of the cage unit of the above-mentioned conventional structure, the holding member that holds the outer peripheral side of the cylindrical rollers at the return row and bidirectional change row positions in the endless circulation row is connected to the return row side member and the two direction change row side members. Although the return row and direction change row are continuous, they are in the form of an overlapping combination of two sheets, so in either case, due to the divided structure of the holding member, it is inevitable that the holding member The presence of joints results in discontinuous rolling grooves, which causes the cylindrical rollers to lock at the joints, impeding smooth movement guiding action, and complicating the structure.

[Means for Solving the Problems] The purpose of the present invention is to eliminate these inconveniences, and its gist is to provide projections 9 on the left and right sides of the lower surface of the main body member 8, and Load row 2
a, a holding member 14 is fitted on the outside of the protrusion 9, and a return row 2b and a direction change row 2c connecting both ends of the return row 2b are provided, and a load row 2a, a return row 2b, and a direction change row 2c are provided. A plurality of cylindrical rollers 1 are arranged with their axes intersecting alternately in an endless circulation row 2 consisting of
A linear motion roller bearing comprising a sliding body 7 arranged in an annular manner, and a track rail 3 having a rolling groove 4 disposed between the projections 9 and in contact with the outside of the cylindrical roller 1 at the load row 2a position. , the holding member 14 forming the return row 2b and the bidirectional change row 2c of the endless circulation row 2 is not formed by joining divided pieces of material, but is formed from a single piece having a thick wall. This relates to a linear motion roller bearing characterized in that a return row 2b and a direction change row 2c are formed by fitting the holding member 14 from below.

[Effect]

Since the holding member 14 is not formed by joining divided members but is formed as a single piece, the return row 2b and the direction change row 2c become seamless continuous rolling grooves 13. Therefore, the return row 2b and the direction change row row 2c
In this case, the smooth rolling of the cylindrical roller 1 is not hindered.

〔Example〕

1 to 5 show embodiments of the present invention, 1
is a cylindrical roller, and is formed of a plurality of rollers having substantially equal diameters and lengths, and has a load row 2a, a return row 2b, and both rows 2a, 2 with their axes alternately crossing each other.
It is arranged in a ring with an infinite circulation train 2 consisting of a direction change train 2c communicating between both ends of b.

Reference numeral 3 denotes a track rail, which is made into a rectangular bar shape and has V-shaped rolling grooves 4 formed on both sides thereof to contact the outer peripheral side of the cylindrical rollers 1 at the load row 2a position, and in this case is attached to a base 5 on the fixed side. A bolt hole 6 is formed for the purpose.

Reference numeral 7 denotes a sliding body, in which two oval protrusions 9 are formed on the main body member 8, and a screw hole 11 for attachment to the base 10 on the movable side is formed on the main body member 8, and the protrusions are formed in the main body member 8. Infinite circulation row 2 on the outer peripheral surface of part 9
A V-shaped rolling groove 12 is formed to hold the inner peripheral side of the cylindrical roller 1 at the position, and the outer peripheral side of the cylindrical roller 1 at the return row 2b and bidirectional change row 2c position of the infinite circulation row 2 is formed in the main body member 8. Two holding members 14 having continuous rolling grooves 13 are attached by mounting bolts 15.

In this case, the continuous rolling groove 13 is formed by a conformal milling cutter 16 as shown in FIGS.

Since this embodiment has the above configuration, the cylindrical roller 1
The cylindrical rollers 1 in the exposed load row 2a of the endless circulation row 2 have their outer peripheries connected to the rolling grooves 4 of the track rail 3,
The cylindrical rollers 1 located in the return row 2b and the bidirectional change row 2c are held by the rolling grooves 12 of the main body member 8 on the inner peripheral side, and are held in the rolling grooves 12 of the main body member 8 on the inner peripheral side and by the continuous rolling grooves on the outer peripheral side. 13, and can guide the infinite linear motion of the base 10 on the movable side by the infinite circulation motion of the cylindrical rollers 1 located on both sides of the track rail 3. In particular, the infinite linear motion of the base 10 on the movable side can be guided by the infinite circulation motion of the cylindrical rollers 1 located on both sides of the track rail 3. The outer circumferential side can be held by continuous rolling grooves 13 without joints, so that the cylindrical rollers 1 can smoothly circulate endlessly to the direction change row 2c, the return row 2b, and the direction change row 2c.

Incidentally, the entire structural member is not limited to metal, but may also be made of resin.

[Effect of idea]

As described above, the present invention is capable of holding the outer peripheral sides of the cylindrical rollers at the return row and the bidirectional change row position by continuous rolling grooves without joints, so that the direction change row,
Smooth endless circular motion of the cylindrical rollers to the return row and direction change row.

As described above, the intended purpose can be fully achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an exploded perspective view, Fig. 2 is a cross-sectional view thereof, Fig. 3 is a view taken along line A-A, and Fig. 4 is a processing plane thereof. figure,
FIG. 5 is a processed sectional view. 1... Cylindrical roller, 2... Infinite circulation row, 2a...
Additional row, 2b... Return row, 2c... Direction change row, 3... Track rail, 4... Rolling groove, 7... Cage unit, 12... Rolling groove, 13... Continuous rolling groove , 14... Holding member.

Claims (1)

[Scope of utility model registration request] Projections 9 are provided on the left and right sides of the lower surface of the main body member 8, a load row 2a is provided inside the projection 9, and a holding member 14 is fitted on the outside of the projection 9 to connect the return row 2b and the ends of the two rows. A connecting direction change line 2c is provided,
A sliding body 7 in which a plurality of cylindrical rollers 1 are arranged in an annular manner with their axes alternately intersecting an endless circulation train 2 consisting of a load train 2a, a return train 2b, and a direction change train 2c.
and a track rail 3 having rolling grooves 4 disposed between the protrusions 9 and in contact with the outside of the cylindrical rollers 1 at the load row 2a position. Of these, the holding member 14 that forms the return row 2b and the bidirectional change row 2c is not formed by joining divided members, but is formed from a single thick piece, and the holding member 14 is fitted into the protrusion 9 from below. A roller bearing for linear motion, characterized in that a return row 2b and a direction change row 2c are formed by doing so.