JPH058035U - Solid lubricated linear bearing - Google Patents

Abstract

(57) [Summary] [Structure] A linear motor mover 3 including a flat plate-shaped stator 2 provided on the upper surface of a base 1 and a mover 2 facing the stator 2 with a gap therebetween is supported. In the solid-lubricated linear bearing, the V
A plurality of rolling bearings 4 provided with V-shaped protrusions 31 and V-shaped grooves 41 for inserting the V-shaped protrusions 31 to support the mover 3 are supported on the base 1, and the rolling bearings 4 are supported. The solid lubricating rod 6 made of a self-lubricating material is pressed against the surface of the V-shaped groove 41 on the side opposite to the side in contact with the moving element 3. [Effect] Even if the solid lubricant baked on the surface of the rolling bearing and the support surface of the moving element is worn or disappeared, the transition film is continuously replenished from the self-lubricating material, so that the lubrication is maintained for a long time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solid-lubricated linear bearing that can be used under harsh environmental conditions such as vacuum, high temperature, low temperature, and radiation, and more particularly to a linear motor linear bearing having a plate-shaped moving element.

[0002]

[Prior Art]

 Conventionally, as a solid-lubricated linear bearing that supports a mover such as a linear motor, a guide rod provided on the stator is slidably fitted with a cylindrical member provided on the inner periphery of the mover to form a guide rod. It is disclosed that the outer peripheral surface is coated with a solid lubricant (for example, Japanese Utility Model Laid-Open No. 61-62582). Further, there is disclosed a cylindrical bearing having a supply hole penetrating from the outer circumference to the inner circumference so that the solid lubricant is pressed against the support shaft from the supply hole via a spring (for example, actual opening). 62-196927 and 63-62699.

[0003]

[Problems to be solved by the device]

 However, the guide rod coated with a solid lubricant has the drawback that the coating of the solid lubricant wears away and disappears as the slider slides repeatedly, and the lubrication effect disappears, resulting in a short bearing life. there were. Further, when the fixed lubricant is pressed against the shaft from the supply hole provided on the outer periphery of the bearing, the solid lubricant is transferred only to a part of the shaft, and seizure is likely to occur in the non-transferred part. Further, if the solid lubricant is pressed against the entire surface of the support shaft, the bearing becomes complicated. An object of the present invention is to provide a linear bearing that supports a flat plate-shaped moving element of a linear motor, which has a simple structure and has a long life in which solid lubricant is easily transferred to the entire supporting surface of the moving element. It is what

[0004]

Means for Solving the Problems The present invention provides a moving element of a linear motor including a flat plate-shaped stator provided on an upper surface of a base and a moving element facing the stator via a gap. Supporting solid lubrication In a linear bearing, a V-shaped projection provided on both side surfaces extending in the moving direction of the mover and a V-shaped groove for supporting the mover by inserting the V-shaped projection are provided on the outer circumference. A plurality of rolling bearings supported by the base, and a solid lubricating rod made of a self-lubricating material is pressed against the surface of the V-shaped groove on the opposite side of the rolling bearings from the side in contact with the moving element. And a pressing device as described above.

[0005]

[Action]

When the stator is energized to reciprocate the mover, the MoS ₂ film baked on the mutual contact surfaces of the mover and the rolling bearing is initially lubricated. As the number of reciprocating motions increases, the MoS ₂ film gradually wears and loses its lubrication effect. A transfer film is formed on the entire surface of the groove to maintain the lubrication between the rolling bearing and the mover.

[0006]

【Example】

The present invention will be described with reference to the embodiments shown in the drawings. FIG. 1 is a front sectional view showing an embodiment of the present invention, and FIG. 2 is a plan view thereof. Is located. V-shaped projections 31 are provided on both side surfaces of the moving element 3 extending in the longitudinal direction. A plurality of rolling bearings 4 each having a V-shaped groove 41 on the outer periphery are arranged along both sides of the moving element 3 at appropriate intervals, and a support shaft 42 supporting the rolling bearings 4 is fixed to the base 1 and moved. The V-shaped projection portion 31 of the child 3 is inserted into the V-shaped groove 41, and the moving element 3 is supported by the rolling bearing 4. The solid lubricant 5 made of MoS ₂ or the like is baked on the surface of the V-shaped protrusion 31 of the moving element 3 and the V-shaped groove 41 of the rolling bearing 4. The same solid lubricant 5 is baked on the rolling elements and rolling surfaces of the rolling bearing 4. A case 7 in which a solid lubricating rod 6 made of a self-lubricating material is slidably housed on the side of the rolling bearing 4 opposite to the side in contact with the moving element 3 and a panel 8 provided in the case 7 A pressing device composed of and is provided, and the solid lubricant rod 6 is pressed against the surface of the V-shaped groove 41 of the rolling bearing 4 via the spring 8. Incidentally, polyether ether resin and filled MoS _2, PTFE, respectively alone or in combination as a self-lubricating material, tetrafluoride ethylene emission resin filled with MoS _2, self-lubricating SL alloy (Toshiba Tungaloy Corporation Materials such as sintered alloy product name) and lead bronze casting LBC3C (80% Cu, 10% Sn, 10% Pb) are used. When the stator 2 is energized to reciprocate the mover 3, the MoS ₂ film baked on the mutual contact surfaces of the mover 3 and the rolling bearing 4 is initially lubricated. As the number of reciprocating motions increases, the MoS ₂ film gradually wears and loses its lubricating effect. However, the lubricant is transferred from the solid lubricating rod 6 pressed against the V-shaped groove 41 of the rolling bearing 4. As a result, a transition film is formed on the surface of the V-shaped groove 41, and the lubrication between the rolling bearing 4 and the moving element 3 is maintained.

[0007]

[Effect of the device]

 As described above, according to the present invention, the self-lubricating material is pressed against the surface of the rolling bearing that supports the moving element, so that the solid lubrication burned on the surface of the rolling bearing and the supporting surface of the moving element is performed. Even if the agent wears or disappears, the transition film continues to be replenished from the self-lubricating material, so that lubrication is maintained for a long time, and it is possible to provide an inexpensive and long-life solid lubrication linear bearing.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of the present invention.

FIG. 2 is a front view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Base 2 Stator 3 Moving Element 31 V-Shaped Protrusion 4 Rolling Bearing 41 V-Shaped Groove 42 Support Shaft 5 Solid Lubricant 6 Solid Lubrication Rod 7 Case 8 Spring 9 Pressing Device

Claims (1)

Claims for utility model registration: A linear motor provided with a flat plate-shaped stator provided on an upper surface of a base and a slider facing the stator via a gap. In a solid-lubricated linear bearing to be supported, a V-shaped projection provided on both side surfaces extending in the moving direction of the mover and a V-shaped groove for supporting the mover by inserting the V-shaped projection are provided on the outer periphery. A plurality of rolling bearings supported by the base, and a solid lubricating rod made of a self-lubricating material is pressed against the surface of the V-shaped groove on the opposite side of the rolling bearing from the side in contact with the moving element. A solid lubrication linear bearing, characterized by comprising: