§1. KHÁI NIỆM CHUNG
1. Các dạng chuyển động
Vít quay, đai ốc tịnh tiến
Vít quay và tịnh tiến, đai ốc đứng yên
Vít tịnh tiến, đai ốc quay
Vít cố định, đai ốc quay và tịnh tiến
3
Th.S Nguyễn Minh Quân –Bộ môn Cơ sở thiết kế máy và Robot, Đại học Bách Khoa Hà Nội - https://sites.google.com/site/quannm187/
CuuDuongThanCong.com https://fb.com/tailieudientucntt
cuu duong than cong . com
2. Đánh giá
Ưu điểm:
-Cấu tạo đơn giản, thực hiện được các chuyển động chậm, chính xác
- Kích thước nhỏ, khả năng tải cao.
- Làm việc êm
Nhược điểm:
-Hiệu suất thấp do ma sát trên ren
- Chóng mòn Vít me bi
4
Th.S Nguyễn Minh Quân –Bộ môn Cơ sở thiết kế máy và Robot, Đại học Bách Khoa Hà Nội - https://sites.google.com/site/quannm187/
CuuDuongThanCong.com https://fb.com/tailieudientucntt
cuu duong than cong . com
4. Vận tốc
Vít quay 1 vòng, độ dịch chuyển
Vít quay n vòng, độ dịch chuyển
Zp
nZp
. . ( / ) ( / )
60.1000
Zpn
v Z p n m ph m s
5
Th.S Nguyễn Minh Quân –Bộ môn Cơ sở thiết kế máy và Robot, Đại học Bách Khoa Hà Nội - https://sites.google.com/site/quannm187/
CuuDuongThanCong.com https://fb.com/tailieudientucntt
cuu duong than cong . com
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