CN102242760A

CN102242760A - High-precision eccentricity-adjustable eccentric shaft

Info

Publication number: CN102242760A
Application number: CN2010101776469A
Authority: CN
Inventors: 武勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-12
Filing date: 2010-05-12
Publication date: 2011-11-16

Abstract

The invention discloses a high-precision eccentricity-adjustable eccentric shaft, wherein a circular table concentric with an eccentric circle is manufactured in the middle of the eccentric circle of the eccentric shaft; each eccentric bushing is cut into two bilaterally symmetrical parts along a plane vertical to a self axis of the eccentric bushing; large holes and small holes which are concentric are respectively manufactured in the middle of each eccentric bushing; free sizes of the large holes and the small holes are respectively the same as the diameters of the circular table and the eccentric circle on the eccentric shaft; in a cooperative relationship, the large holes and the circular table are in tight fit; the small holes and the eccentric circle are in clearance fit; a plurality of key slots are uniformly manufactured on the middle small holes of each eccentric bushing along a circumferential direction; each eccentric bushing and the eccentric shaft are located through a key in a circumferential direction; and left and right eccentric bushings are fixed together through a bolt so as to form an integral body.

Description

A kind of highi degree of accuracy, the adjustable eccentric shaft of throw of eccentric

Technical field

The present invention relates to a kind of eccentric shaft, particularly a kind of highi degree of accuracy, throw of eccentric can be debugged eccentric shaft, belong 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, sometimes need according to specific job specification and job requirement, use the eccentric shaft of different throw of eccentric, 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 by key and groove or spline, by selecting eccentric bushing and eccentric shaft to obtain the throw of eccentric of needs at the diverse location 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, for the ease of the needs of regulating, all leave certain clearance between key that cooperatively interacts or the spline, simultaneously, reason owing to foozle, in above-mentioned cooperation, also can there be corresponding gap, this will make, and to combine precision between eccentric bushing and the eccentric shaft relatively poor, output is impacted easily at work, not only cause bigger noise easily, simultaneously, also can reduce the working life of part.

Summary of the invention

The objective of the invention is to: a kind of highi degree of accuracy, the adjustable eccentric shaft of throw of eccentric are provided, overcome combine between the existing existing eccentric bushing of adjustable eccentric shaft and the eccentric shaft precision relatively poor, at work be easy to generate impacts, cause bigger noise, the reduction part defective in working life easily.

The present invention realizes that the technological scheme that above-mentioned purpose adopts is: the eccentric circle intermediate portion of eccentric shaft is produced a round platform concentric with eccentric circle, with eccentric bushing along with the plane of himself axis normal on cutting be symmetrical two, the centre of eccentric bushing produces concentric macropore and aperture respectively, the free size of described macropore and aperture respectively with eccentric shaft on round platform, the equal diameters of eccentric circle, fasten in the pass that cooperates, macropore and round platform are drive fit, aperture and eccentric circle are Spielpassung, on the middle aperture of eccentric bushing, along the circumferential direction produce the keyway of some quantity evenly, realize the location of circumferencial direction between eccentric bushing and the eccentric shaft by key, about two eccentric bushings form complete one by bolt together.

Beneficial effect: the present invention forms to closely cooperate by macropore and round platform and has eliminated gap between eccentric bushing and the eccentric shaft, simultaneously, by keyway on the middle aperture of eccentric bushing, realize between eccentric shaft and the eccentric bushing location at circumferencial direction, be fixed as complete one by the bolt eccentric bushing that the left and right sides is discrete again, so, the present invention not only can realize adjusting the purpose of throw of eccentric, simultaneously, combine the precision height between eccentric bushing and the eccentric shaft, be not easy to produce impact at work, be not easy trigger noise, the high life of part.

Description of drawings

Fig. 1 is a structure principle chart of the present invention;

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.

Specific implementation method

Two keys (3) are 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 eccentric shaft (1) two ends, with bolt (4) with about two eccentric bushings (2) tighten together; If need to regulate throw of eccentric, then bolt (4) is unclamped, left and right sides eccentric bushing (2) is separated with key (3) combination, and with the identical angle of the simultaneously relative eccentric shaft rotation of left and right sides eccentric bushing (2), because the size of throw of eccentric O1-O3 and angle O1, O2, O3 size are relevant, so, as long as regulate angle O1, O2, O3 size just can realize.

Claims

1. a highi degree of accuracy, the adjustable eccentric shaft of throw of eccentric, 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 eccentric shaft (1) two ends, with bolt (4) with about two eccentric bushings (2) tighten together;

2. according to claims 1 described a kind of highi degree of accuracy, the adjustable eccentric shaft of throw of eccentric, it is characterized in that: if needs are regulated throw of eccentric, then bolt (4) is unclamped, left and right sides eccentric bushing (2) is separated with key (3) combination, and with the identical angle of the simultaneously relative eccentric shaft rotation of left and right sides eccentric bushing (2), because the size of throw of eccentric O1-O3 and angle O1, O2, O3 size are relevant, so, as long as regulate angle O1, O2, O3 are big or small just can realize.