CN-121993493-A - Roller linear guide rail pair

Abstract

The invention discloses a roller linear guide rail pair which comprises a guide rail, a sliding block and rollers, wherein a bead returning pipeline for the rollers to roll circularly is arranged in a rotary hole in the sliding block, the bead returning pipeline is formed by splicing left and right symmetrical strip-shaped plates, a strip-shaped oil groove is formed in the middle of each strip-shaped plate along the length direction, strip-shaped hollowed holes are symmetrically formed in two sides of each strip-shaped oil groove, and chamfers are arranged at the matching positions of two ends of each strip-shaped plate and a return device. The invention mainly adopts the split hollow type bead return pipeline design, effectively improves the deformation capacity of the bead return pipeline, releases the resistance generated by the clamping stagnation of the roller, and improves the smoothness and stability of the movement.

Inventors

• Su hanye
• TAN YANLAN
• HUANG BINGJIAN
• FENG JIANWEN
• GUAN JINGKAI
• CAO PENGJIE

Assignees

• 广东凯特精密机械有限公司
• 北京凯特精密机械有限公司

Dates

Publication Date

20260508

Application Date

20260407

Claims (10)

1. 1. A roller linear guide rail pair is characterized by comprising a guide rail (1), a sliding block (2) and a roller (3); The ball return pipeline (4) for the roller (3) to roll circularly is arranged in the rotary hole (21) in the sliding block (2), the ball return pipeline (4) is formed by splicing left and right symmetrical strip-shaped plates (41), each strip-shaped plate (41) is provided with a strip-shaped oil groove (411) along the middle position of the length direction of the strip-shaped plate, two sides of the strip-shaped oil groove (411) are symmetrically provided with strip-shaped hollowed-out holes (412), and chamfer angles (413) are arranged at the matching positions of two ends of each strip-shaped plate (41) and the return device (5).
2. 2. A roller linear guide pair according to claim 1, wherein mutually matched bosses (414) and grooves (415) are respectively arranged on the abutting surfaces of the mutually spliced strip-shaped plates (41).
3. 3. The roller linear guide pair according to claim 1, characterized in that the grooves (22) of the slider (2) are provided with holders (6) for holding the rollers (3).
4. 4. A roller linear guide pair according to claim 3, characterized in that the retainer (6) is provided with a retaining steel strip (7) having an m-arc structure.
5. 5. A roller linear guide pair according to claim 4, wherein three inwardly recessed pressing points (71) are provided on the holding steel belt (7) corresponding to both ends and the middle position of the holder (6), respectively.
6. 6. A roller linear guide pair according to claim 1, characterized in that the cross section of the groove (22) on the slider (2) is linear, and the groove (22) and the flange (24) are connected through a clearance groove (23).
7. 7. A roller linear guide assembly according to claim 6, wherein the flange (24) is an outer convex arc.
8. 8. A roller linear guide pair according to claim 7, wherein the distance from the apex of the convex circular arc line to the theoretical linear flange C is L, L increasing with the diameter of the roller (3).
9. 9. The roller linear guide pair of claim 8, wherein L is between 0.02mm and 0.08 mm.
10. 10. A roller linear guide pair according to claim 9, characterized in that the center of the outer convex arc line is located on the center line of the roller (3), and the radius of the outer convex arc line increases as the diameter of the roller (3) increases.

Description

Roller linear guide rail pair Technical Field The invention belongs to the technical field of linear guide rail pair assemblies, and particularly relates to a roller linear guide rail pair. Background The prior art is difficult to meet strict requirements of high-end numerical control machine tools and aerospace equipment on ultra-precision, high rigidity, long service life and low maintenance cost of the roller guide rail pair by small-size semiconductor precision equipment, so that the structural optimization and performance improvement of the roller guide rail pair are key technical problems to be solved in the field of precision transmission. However, the roller guide pairs of the prior art often have disadvantages in terms of smoothness of operation, wear resistance and impact resistance while pursuing high rigidity. Therefore, structural optimization and performance improvement of the roller guide rail pair are key technical problems to be solved in the field of precision transmission. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the roller linear guide rail pair with better running smoothness. The invention is realized by the following technical scheme that the roller linear guide rail pair comprises a guide rail, a sliding block and a roller; The ball return pipeline is formed by splicing left and right symmetrical strip-shaped plates, each strip-shaped plate is provided with a strip-shaped oil groove along the middle position of the length direction of the strip-shaped plate, two sides of each strip-shaped oil groove are symmetrically provided with strip-shaped hollowed-out holes, and two ends of each strip-shaped plate are provided with chamfers at matching positions of the two ends of the strip-shaped plate and a reversing device. According to some embodiments of the invention, mutually matched bosses and grooves are respectively arranged on the butt surfaces of the mutually spliced strip-shaped plates. According to some embodiments of the invention, the grooved location of the slider is provided with a cage for holding the rollers. According to some embodiments of the invention, the retainer is provided with a retaining steel band in an m-arc structure. According to some embodiments of the invention, the holding steel belt is provided with three inward concave pressing points corresponding to two ends and the middle position of the holding frame respectively. According to some embodiments of the invention, the cross section of the groove on the sliding block is linear, and the groove and the flange are connected through a clearance groove. According to some embodiments of the invention, the flange is a convex arc. According to some embodiments of the invention, the distance from the apex of the convex arc line to the theoretical straight flange C is L, L increasing with increasing diameter of the roller. According to some embodiments of the invention, L is between 0.02mm and 0.08 mm. According to some embodiments of the invention, the center of the outer convex arc line is located on the center line of the roller, and the radius of the outer convex arc line increases as the diameter of the roller increases. According to the embodiment of the invention, the split hollowed-out bead return pipeline is mainly designed, and the bead return pipeline is formed by splicing two strip-shaped plates with strip-shaped hollowed-out holes. When the guide rail pair runs at a high speed, rollers are easy to accumulate on the revolving channels of the ball return pipeline and the return end cover, so that the clamping stagnation phenomenon is caused, the deformation capacity of the ball return pipeline is effectively improved due to the design of the strip-shaped hollowed-out holes on the ball return pipeline, the resistance generated by the clamping stagnation of the rollers is released, and the movement smoothness and stability are improved. In addition, the long-strip-shaped oil groove in the middle of the long-strip-shaped plate forms a continuous lubricating grease storage area along the length direction of the pipeline, ensures that the roller is fully lubricated during rolling, avoids local dry friction and groove burn, and realizes simple and effective long-acting lubrication. Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Drawings The invention is further described with reference to the accompanying drawings and examples, in which: FIG. 1 is a schematic view of the present invention; FIG. 2 is a schematic view of the interior installation of a slider of the present invention; FIG. 3 is an internal cross-sectional view of the invention; FIG. 4 is an enlarged view at A of FIG. 3; FIG. 5 is a schematic view of a strip plate structure