一种便于装配的行星滚柱丝杠副
By combining the limiting mechanism and the snap ring and slot design, the problem of the retaining ring shifting out during the assembly of the planetary roller screw pair is solved, thereby improving the stability and accuracy of the equipment, extending its service life and simplifying the assembly process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FREEWON CHINA CO LTD
- Filing Date
- 2025-10-11
- Publication Date
- 2026-07-17
AI Technical Summary
During the assembly of planetary roller screw pairs, the retainer ring is prone to displacement due to wear of the retaining ring, which can lead to equipment damage and reduced service life.
A limiting mechanism is adopted, including an arc-shaped rod and a connecting plate. The connecting plate is moved by pressing the block, and the retaining ring is limited by the elastic element to ensure its stability within the nut body. The retaining ring is fixed by the snap ring and the snap groove, reducing the fit clearance and improving accuracy.
The retainer ring is less likely to detach or shift from the nut body, extending equipment lifespan, simplifying assembly steps, and reducing assembly costs.
Smart Images
Figure CN224515832U_ABST
Abstract
Claims
1. A planetary roller screw assembly for ease of assembly, comprising: A nut body (1), wherein a lead screw (101) is provided on one side of the nut body (1), characterized in that it further includes: A connecting mechanism (2) is provided inside the nut body (1). The connecting mechanism (2) includes two retaining rings (201) rotatably installed on the inner wall of the nut body (1). A plurality of roller screws (204) are provided inside the nut body (1). The connecting mechanism (2) is used to connect the nut body (1). The limiting mechanism (3) is located inside the nut body (1). The limiting mechanism (3) includes multiple arc-shaped rods (304) located inside the nut body (1). A connecting plate (303) is fixedly installed on the side of the arc-shaped rods (304). The limiting mechanism (3) is used to limit the retaining ring (201).
2. A planetary roller screw assembly according to claim 1, wherein, The two retaining rings (201) are respectively provided with through holes (203) and multiple mounting holes (202) on their sides. The multiple roller screws (204) are integrally mounted with gear columns (205) at both ends. The outer wall of one end of the gear column (205) is movably connected to the inner wall of the mounting hole (202).
3. A planetary roller screw assembly according to claim 2, wherein, The inner wall of the nut body (1) is integrally provided with a threaded groove (206), and the inner wall of the threaded groove (206) is threadedly connected to the outer wall of the roller screw (204).
4. A planetary roller screw assembly according to claim 3, wherein, The inner wall of the nut body (1) is integrally provided with two internal gear rings (207), and the inner walls of the two internal gear rings (207) are meshed with the outer wall of the gear column (205).
5. A planetary roller screw assembly according to claim 4, characterized in that The outer wall of the lead screw (101) is engaged with the outer wall of the roller screw (204). The inner wall of the nut body (1) has two slots (208). The inner walls of the two slots (208) are respectively engaged with snap rings (209). The sides of the two snap rings (209) abut against the sides of the two retaining rings (201).
6. A planetary roller screw assembly according to claim 1, wherein, The outer wall of the retaining ring (201) is provided with a groove (301), and the inner wall of the groove (301) is provided with a plurality of connecting grooves (302). The connecting grooves (302) are "L" shaped, and the sides of the plurality of connecting plates (303) are slidably connected to the inner walls of the plurality of connecting grooves (302).
7. A planetary roller screw assembly according to claim 6, wherein, The sides of the multiple arc-shaped rods (304) are slidably connected to the inner wall of the groove (301), and the sides of the multiple connecting plates (303) are fixedly installed with push blocks (305).
8. A planetary roller screw assembly according to claim 7, characterized in that The sides of the multiple connecting plates (303) are elastically connected to the inner wall of one side of the connecting groove (302) through elastic elements (306). The inner wall of the nut body (1) has two limiting grooves (307). The outer walls of the multiple arc rods (304) are slidably connected to the inner walls of the limiting grooves (307).