CN202108861U

CN202108861U - Adjustable eccentric shaft structure with high precision

Info

Publication number: CN202108861U
Application number: CN2011200814444U
Authority: CN
Inventors: 武勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-19
Filing date: 2011-03-19
Publication date: 2012-01-11
Anticipated expiration: 2021-03-19

Abstract

Provided is an adjustable eccentric shaft structure with high precision. An eccentric shaft mechanism is provided with two keys which are respectively installed in key grooves at two ends of an eccentric shaft, two eccentric bushings are respectively and symmetrically installed in the middle of the eccentric shaft from two ends of the eccentric shaft, and the right eccentric bushing and the left eccentric bushing are connected together through a bolt. When eccentric distance is needed to be adjusted, the bolt is loosened so as to enable the right eccentric bushing and the left eccentric bushing to be separated from the keys and lead the right eccentric bushing and the left eccentric bushing to be rotated the same angle relative to the eccentric shaft. Due to the fact that the length of the eccentric distance O1 to O3 is concerned with the angular dimension of inclined angles O1, O2 and O3, adjustment of the eccentric distance can be achieved by adjusting the inclined angles O1, O2 and O3.

Description

The adjustable eccentric shaft structure of a kind of highi degree of accuracy

Technical field

The utility model relates to a kind of eccentric shaft structure, and the adjustable eccentric shaft structure of particularly a kind of highi degree of accuracy belongs to the General Mechanical Parts technical field.

Background technique

Eccentric shaft is the strength member of many machinery, such as, motor, air compressor, punch press or the like; In some machinery, need use the eccentric shaft of different throw of eccentric according to specific job specification and job requirement sometimes; For this reason, need the throw of eccentric of eccentric shaft to regulate, the adjustable eccentric shaft of existing throw of eccentric; Generally be that an eccentric bushing is installed in above the another one eccentric shaft through key and groove or spline, through selecting eccentric bushing and the throw of eccentric of eccentric shaft at the diverse location acquisition needs of circumferencial direction, the eccentric shaft of this adjustable eccentric distance; Because the location between eccentric bushing and the eccentric shaft relies on key or the spline that cooperatively interacts fully, the needs for the ease of regulating all leave certain clearance between key that cooperatively interacts or the spline; Simultaneously, because foozle, in above-mentioned cooperation; Also can have corresponding gap, this will make between eccentric bushing and the eccentric shaft and combine precision relatively poor, and output is impacted easily at work; Not only cause bigger noise easily, simultaneously, also can reduce the working life of part.

The model utility content

The purpose of the utility model is: provide a kind of highi degree of accuracy adjustable eccentric shaft structure, overcome combines between the existing existing eccentric bushing of adjustable eccentric shaft and the eccentric shaft precision relatively poor, be easy to generate impacts, initiation is bigger easily noise, the reduction part defective in working life at work.

The utility model realizes that the technological scheme that above-mentioned purpose adopted is: the adjustable eccentric shaft structure of a kind of highi degree of accuracy; It is by eccentric shaft mechanism one or two key to be arranged; Two keys are installed in respectively in the keyway at eccentric shaft two ends; Two eccentric bushings are installed in the centre of eccentric shaft respectively symmetrically from the two ends of eccentric shaft, bolt with about two eccentric bushings link together; When needing to regulate throw of eccentric; Bolt is unclamped; Make left and right sides eccentric bushing and key combine to separate, and with the left and right sides eccentric bushing identical angle of eccentric shaft rotation relatively simultaneously, because the size of throw of eccentric O1-O3 and angle O1, O2, O3 size are relevant; So, just can realize as long as regulate angle O1, O2, O3 size.

Beneficial effect: the utility model forms through macropore and round platform and closely cooperates; Eliminated the gap between eccentric bushing and the eccentric shaft, simultaneously, through keyway on the middle aperture of eccentric bushing; Realize between eccentric shaft and the eccentric bushing location at circumferencial direction; Again through bolt with about discrete eccentric bushing be fixed as complete one, so the utility model not only can realize adjusting the purpose of throw of eccentric; Simultaneously, combine between eccentric bushing and the eccentric shaft precision high, be not easy to produce impact at work, be not easy trigger noise, the high life of part.

Description of drawings

Fig. 1 is the structure principle chart of the utility model;

Fig. 2 is that throw of eccentric forms schematic diagram;

Shown in the figure: 1, eccentric shaft; 2, eccentric bushing; 3, key; 4, bolt; O1, eccentric shaft self gyration center; O2, the eccentric circle center of circle; O3, the eccentric bushing center of circle.

Embodiment

Eccentric shaft mechanism has 3, two keys 3 of one or two key to be installed in respectively in the keyway at eccentric shaft two ends, and two eccentric bushings 2 are installed in the centre of eccentric shaft 1 respectively symmetrically from the two ends of eccentric shaft 1, bolt 4 with about two eccentric bushings 2 link together; When needing to regulate throw of eccentric; Bolt 4 is unclamped; Make left and right sides eccentric bushing 2 and key 3 combine to separate, and with the left and right sides eccentric bushing 2 identical angle of eccentric shafts rotation relatively simultaneously, because the size of throw of eccentric O1-O3 and angle O1, O2, O3 size are relevant; So, just can realize as long as regulate angle O1, O2, O3 size.

Claims

1. adjustable eccentric shaft structure of highi degree of accuracy; It is characterized in that: two keys (3) are installed in respectively in the keyway at eccentric shaft two ends; Two eccentric bushings (2) are installed in the centre of eccentric shaft (1) respectively symmetrically from the two ends of eccentric shaft (1), bolt (4) with about two eccentric bushings (2) link together.