Bearings and other parts of the shaft position
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Common axial positioning methods are: shoulder or collar, sleeve, round nut, ring, conical shaft first.
(1) shoulder: shoulder consists of locating surface and rounded corners. Face in order to ensure the parts can be by locating surface and shoulder radius parts must be smaller than the hub hole radius or chamfer heights; In order to ensure the enough strength to bear axial force, shoulder height value is h = (2-3) R.
(2) collar: the collar of size parameters of the function and the same as the shoulder, width b acuity 1.4 h. If collar blank is forging and become, the less material, light weight. If from pure by the round steel billet, the waste of materials and the processing time.
(3) the collar: the collar is to locate the position has certain parts to help, its two end face for locating surface, therefore, should have a higher degree of parallelism and perpendicularity. For shaft parts reliable positioning, should make the axial length ratio parts hub length of 2 ~ 3 mm. Use the collar can simplify the structure of shaft and reduce the stress concentration. But due to the shaft sleeve and the shaft with a loose, hard work, so should not be used in the high-speed shaft, lest produce unbalanced force.
(4) round nut: when the shaft of the distance between two parts is bigger, and allow the shaft thread cutting round nut capillary pressure parts ends are available. Convenient operation round nut positioning, usually use fine thread to enhance capacity and decrease of the strength of the shaft locking weakened and stress concentration.
(5) the shaft end baffle: when the parts in the shaft end, available shaft end baffle and shoulder, shaft end baffle and bidirectional fixed cone surface to make parts. Baffle with screw fastening and pressure on the shaft end is positioned end face of parts. The method is simple, reliable, convenient installation, but need to be threaded hole in shaft end processing.
(6) cone surface, can be used with the shaft end baffle and round nut. Taper cone in the hours, the required axial force is small, but is not easy to remove; Conversely, on the other hand. Usually take 1:30 taper ~ 8.
(7) elastic ring: cut out of the ring groove on the shaft, the elasticity retaining ring embedded groove, use it on the side of the face of pressure is positioned parts. This method is good manufacturability, convenient installation, but on the strength of the shaft extinction is larger, often used in small and large rigidity in the axial force of the shaft.
(8) cone pin, lock collar, tight set screw: these three locating method is often used in optical axis.
2. Parts of the shaft axial positioning: positioning way according to the size of the transmission torque and nature, parts of the accuracy of high and low, processing factors such as easy to choose. Circumferential locating methods are: key, spline, forming, the elastic ring, pin, interference, such as coupling, known as coupling shaft hub.
234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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1. Parts on the shaft axial positioning: the parts on the shaft axial positioning method, mainly depends on the size of the axial force it suffered. In addition, the shaft manufacturing and shaft parts should also be considered the ease of installation, the influence of the strength of shaft and the working reliability and other factors.Common axial positioning methods are: shoulder or collar, sleeve, round nut, ring, conical shaft first.
(1) shoulder: shoulder consists of locating surface and rounded corners. Face in order to ensure the parts can be by locating surface and shoulder radius parts must be smaller than the hub hole radius or chamfer heights; In order to ensure the enough strength to bear axial force, shoulder height value is h = (2-3) R.
(2) collar: the collar of size parameters of the function and the same as the shoulder, width b acuity 1.4 h. If collar blank is forging and become, the less material, light weight. If from pure by the round steel billet, the waste of materials and the processing time.
(3) the collar: the collar is to locate the position has certain parts to help, its two end face for locating surface, therefore, should have a higher degree of parallelism and perpendicularity. For shaft parts reliable positioning, should make the axial length ratio parts hub length of 2 ~ 3 mm. Use the collar can simplify the structure of shaft and reduce the stress concentration. But due to the shaft sleeve and the shaft with a loose, hard work, so should not be used in the high-speed shaft, lest produce unbalanced force.
(4) round nut: when the shaft of the distance between two parts is bigger, and allow the shaft thread cutting round nut capillary pressure parts ends are available. Convenient operation round nut positioning, usually use fine thread to enhance capacity and decrease of the strength of the shaft locking weakened and stress concentration.
(5) the shaft end baffle: when the parts in the shaft end, available shaft end baffle and shoulder, shaft end baffle and bidirectional fixed cone surface to make parts. Baffle with screw fastening and pressure on the shaft end is positioned end face of parts. The method is simple, reliable, convenient installation, but need to be threaded hole in shaft end processing.
(6) cone surface, can be used with the shaft end baffle and round nut. Taper cone in the hours, the required axial force is small, but is not easy to remove; Conversely, on the other hand. Usually take 1:30 taper ~ 8.
(7) elastic ring: cut out of the ring groove on the shaft, the elasticity retaining ring embedded groove, use it on the side of the face of pressure is positioned parts. This method is good manufacturability, convenient installation, but on the strength of the shaft extinction is larger, often used in small and large rigidity in the axial force of the shaft.
(8) cone pin, lock collar, tight set screw: these three locating method is often used in optical axis.
2. Parts of the shaft axial positioning: positioning way according to the size of the transmission torque and nature, parts of the accuracy of high and low, processing factors such as easy to choose. Circumferential locating methods are: key, spline, forming, the elastic ring, pin, interference, such as coupling, known as coupling shaft hub.
