JPH0632808U - Bearing type linear motion automatic lubrication mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent rust on shafts and ball bearings with an inexpensive structure. [Structure] A concave portion 10 is formed in an inner diameter portion of a block 2, and an oil-containing material 14 is arranged in the concave portion 10.
The oil-containing material 14 is pressed against the shaft 4 by the bolt 20 and the spring 16 to supply oil to the shaft 4. An oil film is formed by the oil on the shaft 4 and a ball bearing 8 that is supported by the ball bearing 8 incliningly supported at both ends of the block 2, and this oil film prevents rusting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic oiling mechanism for a bearing type linear motion device that converts the rotation of a drive shaft into a balanced linear motion of a block.

[0002]

[Prior art]

 The bearing type linear motion device uses ball bearings set at 6 angles in the main body (block), and the frictional force between the drive shaft and the ball bearing causes the rotary motion of the drive shaft to be converted into the linear motion of the main body. Are changing.

[0003]

[Problems to be solved by the device]

 The ball bearing used in the linear motion device is made of bearing steel, so rust may occur depending on the operating environment and atmosphere, and this rust may interfere with the movement of the main unit on the drive shaft. However, there was a problem that an excessive driving force was needed.

Further, until now, stainless steel shafts and shafts with plating have been used to prevent the drive shaft from rusting, but the cost is higher than when a bearing steel shaft is used. Existed. The present invention aims to solve the above problems.

[0005]

[Means for solving problems]

 In order to achieve the above object, the present invention presses ball bearings, which are rotatably supported at both ends of the block, to a shaft loosely fitted in a shaft hole of the block, and the ball bearing is attached to the shaft. A bearing-type linear motion device, in which the rotation of the shaft is converted into the balanced linear motion of the block by mounting the block at an angle with respect to the block, a concave portion is provided in an inner diameter portion of the block, The oil-impregnated material is stored in the recessed portion, and the oil-impregnated material is pressed against the shaft by pressing means provided in the block.

[0006]

[Action]

 Oil is supplied from the oil-containing material to the shaft, and an oil film is constantly formed on the shaft and the ball bearings that are in contact with the shaft, preventing the shaft and ball bearings from rusting.

[0097]

【Example】

 Hereinafter, the configuration of the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. 2a and 2b are a pair of block halves, which are connected by a known connecting means (not shown) composed of a bolt and a coil spring to form the block 2 as a whole.

Three ball bearings 8 are rotatably supported at both ends of the block 2 respectively. The ball bearing 8 is in pressure contact with the shaft 4 which is loosely fitted in the shaft hole 6 of the block 2.

The shaft 4 is connected to a rotary drive. The ball bearing 8 is attached to the block 2 at an angle with respect to the shaft 4.

When the shaft 4 is rotated due to the inclination of the ball bearing 8 with respect to the shaft 4, the block 2 is moved linearly along the shaft 4 by the frictional force between the shaft 4 and the ball bearing 8. Is configured.

The block half 2 b is provided with a recessed portion 10 that opens into the shaft hole 6. A shaft-shaped hole 12 is formed in the block half 2b, and the hole 12 is composed of a screw hole portion 12b and a spring accommodating portion 12a communicating with the recessed portion 10.

An oil-impregnated material 14 made of an oil-impregnated resin or the like is slidably fitted in the recessed portion 10 in the thickness direction of the block harf 2b.

A bolt 20 is screwed into the screw hole portion 12 b of the hole 12. In the spring housing portion 12a of the hole 12, a coil spring 16 is arranged between the tip of the bolt 20 and the oil-containing material 14.

The tip of the bolt 20 presses the coil spring 16 through the washer 18, and the pressing force causes the oil-containing material 14 to be in pressure contact with the shaft 4. The pressure contact force of the oil-containing material 14 with respect to the shaft 4 can be adjusted by rotating the bolt 20.

In the above structure, oil from the oil-containing material 14 forms an oil film on the surfaces of the shaft 4 and the ball bearing 8. The shaft 4 and the ball bearing 8 may be made of bearing steel.

The spring 16, the bolt 20 and the screw hole 12 b constitute a pressing means for pressing the oil-containing material 14 onto the shaft 4. The pressing means is not particularly limited to the illustrated embodiment.

[0017]

【effect】

 As described above, the present invention has an effect of being able to reduce the cost because the rust preventive treatment can be applied to the inexpensive shaft and bearing even if they are used.

[Brief description of drawings]

FIG. 1 is a sectional view.

[Explanation of symbols]

 2a Block half 2b Block half 2 Block 4 Shaft 6 Shaft hole 8 Ball bearing 10 Recessed portion 12 Hole 14 Oil-containing material 16 Coil spring 18 Washer 20 Bolt

Claims (1)

[Scope of utility model registration request] 1. A ball bearing (8), which is rotatably supported at both ends of the block (2), is pressed against a shaft (4) loosely fitted in a shaft hole (6) of the block (2). To convert the rotation of the shaft (4) into a balanced linear motion of the block (2) by mounting the ball bearing (8) on the block (2) tilted with respect to the shaft (4). In the bearing type linear motion device, the block (2) is provided with a recessed part (10) in the inner diameter part thereof, and the oil-impregnated material (14) is housed in the recessed part (10). By the pressing means provided in (2), the shaft (4)
Automatic lubrication mechanism characterized by being pressed against.