CN102130528B

CN102130528B - Structure for automatically balancing axial stress of bearings at two ends

Info

Publication number: CN102130528B
Application number: CN 201110062723
Authority: CN
Inventors: 刘延杰; 吴明月; 荣伟彬; 孙立宁
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2011-03-16
Filing date: 2011-03-16
Publication date: 2013-04-10
Anticipated expiration: 2031-03-16
Also published as: CN102130528A

Abstract

The invention relates to a structure for automatically balancing axial stress of bearings at two ends, and the structure is reasonable, can automatically balance the axial stress of the bearings at the two ends and has the characteristics of reliability, no need of adjustment and the like; as one end of axial pre-tightening force of a regulating spring (6) is applied on an inner ring of the bearing (3) at the front end while the other end is applied on a shaft shoulder of a motor shaft (4) and transferred onto the inner ring of the bearing (11) at the back end, the purpose of automatically balancing the axial stress of the bearings at the two ends can be further achieved.

Description

A kind of structure of autobalance bearings at both ends axially loaded

Technical field

The present invention relates in mechanical manufacturing field, a kind of with traditional use adjusting pad or locking nut mode are compared, and mechanical structure that can autobalance bearings at both ends axially loaded, have reliable effect, need not the characteristics such as adjustment.

Background technology

Using two bearings to support at rotating shaft terminal, is the modal version in territory in the machinery neck.In general because the deep groove ball bearings that use more, should not be too much bear axial load, traditional method is by dosing the pad of one group of different-thickness, the end play between bearing being controlled within certain scope; Or by using locking nut, control the end play between two bearings.The shortcoming of these two kinds of methods is: adjust relatively difficulty, and pad wearing and tearing or locking nut loosening after, fragile bearing.

Summary of the invention

The object of the present invention is to provide a kind of rational in infrastructurely, mechanical structure that can autobalance bearings at both ends axially loaded, have reliable effect, need not the characteristics such as adjustment.

Goal of the invention of the present invention is take servomotor as example, and implementation procedure is: a kind of autobalance bearings at both ends axially loaded structure comprises motor front shroud 1, motor fore bearing gland 2, front end bearing 3, motor shaft 4, fore bearing back-up ring 5, regulating spring 6, motor stator 7, motor back cover 8, motor rear end bearing gland 9, rear end bearing back-up ring 10, rear end bearing 11, rotor 12.On the motor front shroud 1, motor fore bearing gland 2 and trip bolt, front end bearing 3, motor stator 7 are housed; On the motor back cover 8, motor rear end bearing gland 9 and trip bolt, rear end bearing 11 are housed; On the motor shaft 4, front end is equipped with regulating spring 6, rotor 12 is equipped with in the rear end.

To the front end of the motor shaft 4 of regulating spring 6, rotor 12 be housed, match with the interior ring diameter of the front end bearing 3 of the motor front shroud 1 of packing into, compression puts in place.

To the motor back cover 8 of rear end bearing gland 9, rear end bearing 11 be housed, the rear end of the motor shaft 4 of packing into makes the interior ring of rear end bearing 11 match with the corresponding diameter of axle of motor shaft 4, and compression puts in place.

Align the assembling screwed hole of motor front shroud 1 and motor back cover 8, tighten screw and be seated.

Fore bearing back-up ring 5, rear end bearing back-up ring 10 are installed in the corresponding diameter of axle position of motor shaft 4.

After finishing above assembling, because axial pre tightening force one end of regulating spring imposes on the interior ring of fore bearing, the other end imposes on the shaft shoulder of motor shaft, and is passed to by the shaft shoulder on the interior ring of rear end bearing, thereby reaches the purpose of the axially loaded of autobalance bearings at both ends.

A kind of autobalance bearings at both ends of the present invention axially loaded structure is compared traditional structure, has following advantage:

1, owing to use autobalance bearings at both ends axially loaded structure, need to not make the position of adjusting pad or the screw thread of locking nut at motor shaft, therefore simplify the structure.

There is pretightning force during 2, owing to the regulating spring assembling, therefore can not produce the gap because service time is long, can prevent that the generation because of the gap from affecting the serviceability of bearing, prolong the useful life of bearing.

There is pretightning force during 3, owing to the regulating spring assembling, therefore in assembling process, need not to adjust, simplified linkage editor.

Description of drawings

Fig. 1 illustrates the cutaway view of autobalance bearings at both ends axially loaded structure take servomotor as example.

In Fig. 1, concrete numeral: 1-drive; The 2-power transmission shaft; The 3-gusset piece; The 4-joint bolt.

Embodiment

The invention will be further described by reference to the accompanying drawings:

With reference to shown in Figure 1, a kind of autobalance bearings at both ends axially loaded structure comprises motor front shroud 1, motor fore bearing gland 2, front end bearing 3, motor shaft 4, fore bearing back-up ring 5, regulating spring 6, motor stator 7, motor back cover 8, motor rear end bearing gland 9, rear end bearing back-up ring 10, rear end bearing 11, rotor 12.Press servomotor manufacturer requirement, finish rotor 12 and the assembling of motor shaft 4 and the assembling of motor stator 7 and motor back cover 8; Regulating spring 6 is contained in the front end of motor shaft 4, pack into successively more front end bearing 3, front end end ring 5; Rear end bearing 11 is packed in the dead eye of motor back cover 8, then motor shaft 4 is passed from motor back cover 8, and rear end bearing 11 loaded put in place; Motor shaft 4 front ends are passed in motor front shroud 1 hole, front end bearing 3 is packed in the dead eye of motor front shroud 1, align the Screw assembly hole of motor front shroud 1 and motor back cover 8, be screwed into the screw assembling; Assemble at last fore bearing gland 2, rear end bearing gland 9, finish the servomotor assembling.

At this moment, because axial pre tightening force one end of regulating spring 6 imposes on the interior ring of front end bearing 3, the other end imposes on the shaft shoulder of motor shaft 4, and is passed to by the shaft shoulder on the interior ring of rear end bearing 11, thereby reaches the purpose of the axially loaded of autobalance bearings at both ends.

Claims

1. an autobalance bearings at both ends axially loaded structure comprises motor front shroud (1), motor fore bearing gland (2), front end bearing (3), motor shaft (4), fore bearing back-up ring (5), regulating spring (6), motor stator (7), motor back cover (8), motor rear end bearing gland (9), rear end bearing back-up ring (10), rear end bearing (11), rotor (12); It is characterized in that: on the described motor front shroud (1), motor fore bearing gland (2) and trip bolt, front end bearing (3), motor stator (7) are housed; On the described motor back cover (8), motor rear end bearing gland (9) and trip bolt, rear end bearing (11) are housed; On the described motor shaft (4), front end is equipped with regulating spring (6), rotor (12) is equipped with in the rear end; The described front end that the motor shaft (4) of regulating spring (6), rotor (12) is housed matches with the interior ring diameter of the front end bearing (3) of the motor front shroud (1) of packing into, and compression puts in place; The described motor back cover (8) that rear end bearing gland (9), rear end bearing (11) are housed, the rear end of the motor shaft of packing into (4) makes the interior ring of rear end bearing (11) match with the corresponding diameter of axle of motor shaft (4), and compression puts in place; After the assembling screwed hole of described motor front shroud (1) and motor back cover (8) aligns, be screwed into screw and be seated; Fore bearing back-up ring (5), rear end bearing back-up ring (10) are installed in the corresponding diameter of axle position of described motor shaft (4); After the described installation, axial pre tightening force one end of regulating spring (6) imposes on the interior ring of front end bearing (3), the other end imposes on the shaft shoulder of motor shaft (4), and be passed to by the shaft shoulder on the interior ring of rear end bearing (11), thereby reach the purpose of the axially loaded of autobalance bearings at both ends.