JPH0710550U - Rolling guide roller row with added damping capacity - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose of the present invention is to facilitate the driving of a moving body moving on a base by means of rolling guides and to damp vibrations by using damping elements. [Structure] A high-rigidity roller 2 made of hardened steel or the like having a diameter Da, and a diameter Db larger than the roller 2 and having a lower rigidity and a larger damping capacity than the hardened steel. The rollers 3 made of the material engineering plastic are alternately arranged in parallel in the retainer 1 to form a roller row A, and the roller row A is inserted between the base 5 and the moving body 4 for use.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention inserts a guide roller row that reduces frictional resistance between a moving body (table, etc.) having a reciprocating guide surface such as a grinder and a base, and the guide roller row has a damping ability to absorb vibration by the roller. The present invention relates to a row of rolling guide rollers.

[0002]

[Prior art]

 Conventionally, a reciprocating table using a rolling guide roller array is known as shown in FIGS.

As shown in FIGS. 1 and 2, a plurality of rollers a made of hardened steel are accommodated in a cage b in parallel, and a roller row held by the cage b is used as a base c. It is inserted between the table and the table d, and is guided by rolling. In the rolling guide dynamic model at this time, as shown in FIG. 3, the table d and the base c are connected via the contact rigidity ka of the roller a.

[0004]

[Problems to be solved by the device]

 Although the rolling guide has a smaller frictional resistance than the sliding guide and is easy to drive, it has a smaller damping capacity than the sliding guide, and this is an obstacle to micro vibrations. It was difficult to obtain roughness and good roundness.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention has a high rigidity roller made of hardened steel or the like having a diameter Da and a diameter Db larger than the diameter Da. It provides a guide roller row in which a roller row made up of engineering plastics, etc., which has a high performance, is housed alternately in parallel with the cage and inserted between the table and the base.

[0006]

[Action]

 The work W held by both the center of the spindle 6 and the tailstock 7 on the table 4 of the present invention rotates, and at the same time the work W traverses on the base 5 via the guide roller train A in a direction perpendicular to the work W. The grinding wheel 10 attached to the motor shaft on the grinding wheel base 6 provided on the base 5 is rotated to make a cut to perform grinding.

In this case, the guide roller row A inserted between the table 4 and the base 5 has a high rigidity roller 2 having a diameter Da, and has a diameter Db larger than the diameter of the roller 2. Then, the rollers 3 having low rigidity and high damping capacity are alternately housed in the cage 1 and inserted between the table 4 and the base 5, so that the rollers 2 and 3 are elastically deformed to balance the load. However, the rigidity ka of the roller 2 is overwhelmingly larger than the rigidity kb of the roller 3, and most of the load is supported by the roller 2 having high rigidity. Therefore, the accuracy of movement such as the straightness of the table 4 is performed by the roller 2. Further, the roller 3 has a diameter (Db-Da) larger than that of the roller 2, and therefore is largely deformed and sandwiched between the table 4 and the base 5. Therefore, if a slight vibration is generated between the table 4 and the base 5, the internal friction of the roller 3 attenuates the vibration.

As described above, the roller 2 mainly supports the load to control the motion accuracy and rigidity, while the roller 3 controls the damping ability.

Therefore, in the table (moving body) using the guide roller row, the damping ability is added while taking advantage of the rolling friction feature of low friction.

[0010]

【Example】

 FIG. 1 shows an embodiment of a rolling guide roller train with damping function according to the present invention, which will be described below with reference to the drawings.

Reference numeral 1 denotes a cage, which has a highly rigid roller 2 made of hardened steel, fine ceramics, etc., having a diameter Da, and a diameter Db larger than the roller 2. Moreover, the roller row A is formed by alternately accommodating the rollers 3 made of material engineering plastic or the like, which have a lower rigidity than the hardened steel and have a large damping capacity, in parallel.

The roller row A is inserted and interposed between the table 4 and the base 5. At this time, the rollers 2 and 3 both elastically deform and balance the load, but the rigidity ka of the roller 2 is overwhelmingly larger than the rigidity kb of the roller 3, and therefore the roller 2 supports most of the load. Therefore, the accuracy of movement such as straightness of the table 4 is determined by the roller 2.

The roller 3 has a larger diameter (Db-Da) than the roller 2 and deforms, and when there is a slight vibration between the table 4 and the base 5, the internal friction of the roller 3 attenuates the vibration.

FIG. 8 and FIG. 9 show a cylindrical grinder using a roller array. As shown in FIG. 10, the table 4 is fitted to the guide plate 5a of the table 4 provided on the base 5. The cage 1 of A is inserted between the table 4, the base 5 and the guide plate 5a to provide rolling guide.

A main shaft 6 and a tailstock shaft 7 are provided on the table 4, and the workpiece W is held by the centers of both, and the workpiece W is traversed through the table 4 from side to side.

Further, on the base 5, a grinding wheel head 9 having a motor 8 provided at an upper portion at a right angle to the table 4 is provided so as to be able to move straight toward a workpiece W of the table 4 and is attached to the motor shaft. The grinding wheel 10 is rotated by the drive of the motor 8 and is cut to grind the workpiece W.

[0017]

As described above, according to the present invention, in the case of slidingly guiding a moving moving body as a base, rollers of different sizes and rigidity are alternately arranged and housed in a cage to form a roller row. By using it between them, the friction resistance is smaller than that of sliding guides and driving is easier.

Further, since the damping element is inserted between the moving body and the base, if there is a minute vibration, the internal vibration of the large-diameter roller has an effect of damping the vibration.

[Brief description of drawings]

FIG. 1 is a plan view showing a conventional rolling guide roller array.

FIG. 2 is a side view of a part of the longitudinal section of FIG. 1 inserted between a table and a base.

FIG. 3 is a dynamic model of rolling guide of FIG.

FIG. 4 is a plan view of a rolling roller row having a damping function according to the present invention.

5 is a side view of the cage of FIG. 4 in section.

6 is a state diagram in which a load is applied between the table and the base in which the roller guide row of FIG. 5 is inserted.

FIG. 7 is a dynamic model of the rolling guide roller row in FIG.

FIG. 8 is a plan view showing the arrangement of a cylindrical grinder.

9 is a side view of FIG.

FIG. 10 is an enlarged cross-sectional view in which a guide roller row is inserted between the table and the base of FIG.

[Explanation of symbols]

 1 Cage 2.3 Roller 4 Table 5 Base 5a Guide plate 6 Spindle 7 Tailstock shaft 8 Motor 9 Wheel head 10 Grinding wheel W Workpiece A Guide roller row

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Seisho Daito 18-27, Izumi 1-chome, Hamamatsu City, Shizuoka Prefecture (72) Inventor Tadashi Ishii ▲ Ki ▼ 220-172 Waaicho, Hamamatsu City, Shizuoka Prefecture

Claims (1)

[Scope of utility model registration request] 1. A high-rigidity roller made of hardened steel or the like, and an engineering plastic or the like which has a large diameter due to the roller and has a lower rigidity and a larger damping capacity than the hardened steel. Rolling guide roller row with added damping characteristics, characterized in that the roller and the roller are alternately arranged in parallel and housed in a cage.