JP2982849B2 - Roller type sliding surface preloading device in sliding structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller type sliding surface preloading device in a sliding structure applied to a sliding portion or a guide portion of a machine tool.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, in a sliding portion of a machine tool, a fixed member 2 having one side forming a reference sliding surface 1 and a movable sliding surface 3 on one side forming a reference sliding surface. The movable member 4 moving along the surface 1 is fitted and arranged, and the other side surface 5 of the fixed member 2 is
The jib 6 opposed to the movable member 4 is supported by the adjustment bolt 7.
And the gap between the other side surface 5 of the fixing member 2 and the jib 6 is adjusted by moving the jib 6 with the adjustment bolt 7. This gap is indispensable for the movable member 4 to smoothly slide on the reference sliding surface 1 of the fixed member 2.

[0003]

However, in the above structure, the gap provides a space where the reference sliding surface 1 and the movable sliding surface 3 can be separated from each other, while ensuring a smooth sliding movement. The separation between the reference sliding surface 1 and the movable sliding surface 3 appears as a processing error in the workpiece. For this reason, in a machine tool that requires a high-precision machining operation, it is necessary to maintain a state in which the reference sliding surface 1 of the fixed member 2 and the movable sliding surface 3 of the movable member 4 are always in sliding contact with each other. .

The present invention solves the above-mentioned problem, and secures a minute gap required for sliding motion between the fixed member 2 and the movable member 4 while maintaining the reference sliding surface of the fixed member and the movable member. An object of the present invention is to provide a roller-type sliding surface preloading device in a sliding structure in which a sliding surface is pressed against each other with a constant urging force and both sliding surfaces are always kept in sliding contact.

[0005]

In order to solve the above-mentioned problems, a roller type sliding surface preloading device in a sliding structure according to the present invention comprises a movable sliding member having a movable sliding surface which slides on a reference sliding surface of a fixed member. In a sliding structure that makes sliding movement while contacting, a roller rolling surface parallel to the reference sliding surface is formed on a fixed member,
A roller that rolls on the roller rolling surface is disposed on the movable member so as to be movable in a direction perpendicular to the roller rolling surface, and a bias is applied to the rear side of the roller so as to press the roller toward the roller rolling surface. This is a configuration in which means are provided.

[0006]

According to the above construction, the force for pressing the roller against the roller rolling surface by the urging means acts as a force for pressing the movable sliding surface of the movable member against the reference sliding surface of the fixed member.
Therefore, the movable member slides while constantly sliding on the reference sliding surface of the fixed member on the movable sliding surface, and the movable member moves smoothly by rolling the roller on the roller rolling surface.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a fixing member 11 is a bed, a column, or the like in a machine tool, and has two parallel portions separated by an appropriate gap, that is, a reference sliding portion 11a and a roller rolling portion 1.
1b. One reference sliding surface portion 11 of the fixing member 11
A reference sliding surface 12a is formed on the side surface a, and a roller rolling surface 12b parallel to the reference sliding surface 12a is formed on the side surface of the other roller rolling portion 11b.

The movable member 13 includes a movable sliding portion 13a and a roller mounting portion 13b which face each other with the reference sliding portion 11a and the roller rolling portion 11b of the fixed member 11 therebetween. And an intermediate portion 13c located therebetween. The movable sliding portion 13a is provided with a movable sliding surface 14 which is in sliding contact with the reference sliding surface 12a, and the roller installation portion 13b is provided with a pair of through portions 15 at front and rear positions along the roller rolling surface 12b. ing.

A roller device 16 which is movable in the direction perpendicular to the roller rolling surface 12b is disposed in the penetrating portion 15. The roller device 16 includes a roller 17 rolling on the roller rolling surface 12b and a roller 17 on the roller rolling surface 12b. And a roller support 19 for supporting the same via a rotating shaft 18. Roller installation section 13
B, a disc spring case 20 is arranged so as to cover the roller support portion 19, and the disc spring case 20 is attached to the roller installation portion 13 b via a jack bolt 21 and an adjustment bolt 22. The jack bolt 21 is implanted in the roller installation portion 13b.
a, and the disc spring case 20 is received by a lock nut 23 screwed into the jack bolt 21. The adjusting bolt 22 is inserted into the hole 20a of the disc spring case 20 and screwed into the roller installation portion 13b, and the head 22a receives the disc spring case 20. A plurality of Belleville springs 24 are arranged inside the Belleville spring case 20, and the Belleville springs 24 serve as urging means for pressing the roller 17 against the roller rolling surface 12 b via the roller support 19.

A jib 25 facing the reference sliding portion 11a of the fixed member 11 is disposed at an intermediate portion 13c of the movable member 13, and the jib 25 has a gap required for sliding with the reference sliding portion 11a. separated by α.

The operation of the above configuration will be described below. The pressing force of the disc spring 24 is adjusted by appropriately operating the lock nut 23 and the adjusting bolt 22, and the roller 18 is pressed against the roller rolling surface 12 b by the disc spring 24 via the roller support 19 of the roller device 16.

The movable member 13 has a movable sliding surface 14 slidably in contact with the reference sliding surface 12a of the fixed member 11,
8 slides while rolling on the roller rolling surface 12b. At this time, the force A of the disc spring 24 pressing the roller device 16 is the reaction force B thereof,
3a is pressed against the reference sliding surface of the reference sliding portion 11a of the fixed member 11, so that the movable sliding surface 14 of the movable member 13 It is possible to maintain a state in which it is always in sliding contact without separating from 12a, and it is possible to guarantee a highly accurate sliding motion.
Further, the roller 17 is a roller rolling surface 12 b of the fixed member 11.
Rolling on the top ensures smooth movement of the movable member 13.

[0013]

As described above, according to the present invention, by pressing the roller against the roller rolling surface by the urging means, the movable member can slide while constantly sliding on the reference sliding surface. As a result, smooth movement of the movable member can be ensured by the roller rolling on the roller rolling surface.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a roller type sliding surface preloading device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a conventional sliding structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Fixed member 12a Reference sliding surface 12b Roller rolling surface 13 Movable member 17 Roller 24 Disc spring

Claims (1)

(57) [Claims] In a sliding structure in which a movable member slides on a movable sliding surface while sliding on a reference sliding surface of a fixed member, a roller rolling surface parallel to the reference sliding surface is formed on the fixed member. A roller that rolls on the roller rolling surface is disposed on the movable member so as to be movable in a direction perpendicular to the roller rolling surface, and the roller is pressed against the roller rolling surface against the rear surface of the roller. A roller-type sliding surface preloading device in a sliding structure, characterized in that biasing means is provided.