CN103398087A

CN103398087A - High-precision standard eccentric shaft with adjustable eccentric distance

Info

Publication number: CN103398087A
Application number: CN201310343076XA
Authority: CN
Inventors: 傅云霞; 曾燕华; 唐冬梅; 张波; 刘芳芳; 石红; 祝逸庆
Original assignee: Shanghai Institute of Measurement and Testing Technology
Current assignee: Shanghai Institute of Measurement and Testing Technology
Priority date: 2013-08-07
Filing date: 2013-08-07
Publication date: 2013-11-20
Anticipated expiration: 2033-08-07
Also published as: CN103398087B

Abstract

The invention discloses a high-precision standard eccentric shaft with an adjustable eccentric distance. The eccentric shaft comprises a main shaft; one side of the main shaft is provided with an external thread section, and the other side of the main shaft is provided with a shaft shoulder; the external thread section is sleeved with a gasket and a locknut which can be screwed on the external thread section; two inclined planes are located between the external thread section and the shaft shoulder, form an angle of 60 DEG and are a same distance away from a central axis and symmetrical with a shaft body; a shaft sleeve, an isolation sleeve and another shaft sleeve are successively sleeved between the shaft shoulder and the gasket; the spindle sleeves are in the shape of rings, two planes forming a 60-DEG angle are arranged in the rings, the two planes respectively match with the two inclined planes of the main shaft, and a pair of replaceable standard-thickness blocks with same height are respectively arranged in a corresponding plane and a corresponding inclined plane. According to the invention, accurate adjusting of the eccentric distance can be realized; through changing of the standard-thickness blocks, a desired standard eccentric distance can be obtained, and influence of manual adjusting can be eliminated; and on a same standard eccentric shaft, rapid measurement and calibration can be realized, and the standard eccentric shaft has a simple and reliable structure.

Description

The highi degree of accuracy standard eccentric shaft of adjustable eccentric distance

Technical field

The present invention relates to a kind of highi degree of accuracy standard eccentric shaft of adjustable eccentric distance, this standard eccentric shaft is mainly used in detection and the calibration of bent axle and eccentric shaft surveying instrument.

Background technique

The mechanical transmission such as bent axle and camshaft component production technology is comparatively perfect at home and abroad, and various surveying instruments and equipment is also comparative maturity abroad, and this quasi-instrument collimation technique abroad is also comparatively perfect.At present, domesticly there is no corresponding complete standard instruments.

In the detection of at present bent axle and measure of cam shaft instrument and calibration, with the standard mandrel be arranged on two top between, measure axis and parallelism and the two top coaxalitys thereof of measuring balladeur train; Afterwards the standard torque-transmitting axle of standard eccentric shaft and standard mandrel combination is arranged on two top between, instrument is set to measuring state, measures eccentricity value, with the standard eccentricity value, compares, and draws the indication error of instrument.For the traditional standard eccentric shaft, all to realize by the regulating mechanism that is formed by eccentric tooth or eccentric cam, this scheme often causes being difficult to meet the throw of eccentric required precision, the highest and the minimum point that is difficult to find positive bias on the same line of centres, often can only detect and calibration the single position of instrument simultaneously.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind ofly can adjust throw of eccentric easily, and reach accurately the requirement throw of eccentric, meet the highi degree of accuracy standard eccentric shaft of the adjustable eccentric distance of different instrument throw of eccentric requirements,, to overcome the prior art shortcoming, realize the accurate adjustment of standard eccentric shaft throw of eccentric.

For solving the problems of the technologies described above, the present invention is achieved by the following scheme:

A kind of standard eccentric shaft of adjustable eccentric distance, comprise main shaft, main shaft one side has external thread section, opposite side has the shaft shoulder, the locking nut that described external screw section is set with packing ring and can screws up with described external thread section, is characterized in that two inclined-planes are arranged between described external thread section and the shaft shoulder, become 60 degree angles between described two inclined-planes, identical and symmetrical with axis body apart from the main axis distance; Be set with successively axle sleeve, separation sleeve and axle sleeve between the described shaft shoulder and packing ring, described axle sleeve circlewise, and two planes that become each other 60 degree angles are arranged in ring, described two planes and main shaft two inclined-planes are complementary, and place respectively the standard thickness piece of a pair of removable equal height in corresponding flat and inclined-plane.

As preferred version, on described axle sleeve, be positioned at the position of two plane symmetry faces, a tapped hole is arranged, make axle sleeve and described principal shaft locking by the Flat-head internal hexagonal screw.

Preferably, there is respectively a center hole at described main shaft two ends.

The beneficial effect of patent of the present invention is, can be by changing the standard thickness piece of different size, reach accurately the accurate adjustment of throw of eccentric, the throw of eccentric highs and lows is confirmed, on same standard eccentric shaft, can realize two kinds of different throw of eccentric, realize Measurement and calibration fast, 60 ° of angle structures using, can, according to the thickness of adding standard thickness piece, calculate the size of throw of eccentric quickly and accurately, end-results is simple, fix by interior hexagonal fastening screw trip bolt, dismounting rapidly, realize the rapid adjustment of different throw of eccentric.

Description of drawings

Fig. 1 is the 3-D view of the standard eccentric shaft of adjustable eccentric distance of the present invention;

Fig. 2 is structural representation of the present invention;

Fig. 3 is the structural representation of main shaft 1;

Fig. 4 is the A-A sectional drawing (distance without acceptance of persons) of Fig. 2;

Fig. 5 is the B-B sectional drawing (throw of eccentric is arranged) of Fig. 2.

Embodiment

Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technological scheme of the present invention in detail.

As depicted in figs. 1 and 2, a kind of highi degree of accuracy standard eccentric shaft that is mainly used in the adjustable eccentric distance of bent axle and the calibration of camshaft calibration instrument, comprise main shaft 1, and main shaft 1 one sides have external thread section 1-1, and opposite side has shaft shoulder 1-2, and there is respectively center hole 1-3 at two ends; The locking nut 5 that external screw section 1-2 is set with packing ring 4 and can screws up with external thread section;

Main shaft 1 structure as shown in Figure 3, has two inclined-plane 1-4 between the external thread section 1-1 of main shaft 1 and shaft shoulder 1-2, become 60 degree angles between inclined-plane 1-4, apart from the main axis distance, is R mm, and is symmetrical with axis body.

Be set with successively axle sleeve 2, separation sleeve 3 and axle sleeve 2 between main shaft 1 shaft shoulder 1-2 and packing ring 4; Circlewise, the axle sleeve 2 large k mm of radius ratio main shaft radius, have two plane 2-1 to axle sleeve 2 in ring, becomes 60 degree angles between two plane 2-1, and are from being (R+L) mm, corresponding with main shaft 1 apart from spindle pitch.On axle sleeve 2, be positioned at the position of two plane 2-1 symmetry plane, a tapped hole is arranged, make axle sleeve 2 and main shaft 1 locking by Flat-head internal hexagonal screw 6.

Between the inclined-plane 1-4 on main shaft 1 and the 2-1 on axle sleeve, standard thickness piece 7 is installed, can selects highly to be the standard thickness piece 7 of H＜=L+k mm.Because inclined surface (1-4 and 2-1) on main shaft 1 and axle sleeve 2 and its symmetry plane are respectively 30 degree angles, thus when the standard thickness tile height with respect to l=(H-K) time, the corresponding distance that is offset 2l mm on the symmetry plane direction of throw of eccentric.Therefore, when selecting standard thickness piece 7-1, while highly being H=L mm, as shown in Figure 4, axle sleeve 2 is concentric with main shaft 1, and throw of eccentric is 0mm, distance without acceptance of persons; , when selecting standard thickness piece 7-2, be highly H=(L+l) during mm, as shown in Figure 5, and axle sleeve 2 and main shaft 1 generation throw of eccentric, the throw of eccentric of generation is 2l mm.By changing the standard thickness piece 7 of different heights, can be under the help by other instrument not, see and produce different throw of eccentric at main shaft 1 and axle sleeve 2, the throw of eccentric direction is perpendicular with two plane 1-4 normal vectors on main shaft 1 and main shaft 1 normal vector, and it is only relevant with standard thickness piece precision and machining accuracy that throw of eccentric is adjusted precision, thereby eliminated the impact of artificial adjusting.

Claims

1. the standard eccentric shaft of an adjustable eccentric distance, comprise main shaft (1), main shaft (1) one side has external thread section (1-1), opposite side has the shaft shoulder (1-2), the locking nut (5) that described external screw section (1-1) is set with packing ring (4) and can screws up with described external thread section (1-1), it is characterized in that, between described external thread section (1-1) and the shaft shoulder (1-2), two inclined-planes (1-4) are arranged, become 60 degree angles between described two inclined-planes (1-4), identical and symmetrical with axis body apart from the main axis distance; Be set with successively axle sleeve (2), separation sleeve (3) and axle sleeve (2) between the described shaft shoulder (1-2) and packing ring (4), described axle sleeve (2) circlewise, and two planes (2-1) that become each other 60 degree angles are arranged in ring, described two planes (2-1) and two inclined-planes (1-4) are complementary, and place respectively the standard thickness piece (7) of a pair of removable equal height in corresponding flat (2-1) and inclined-plane (1-4).

2. the standard eccentric shaft of adjustable eccentric distance according to claim 1, it is characterized in that, on described axle sleeve (2), be positioned at the position of two planes (2-1) symmetry plane, a tapped hole is arranged, by Flat-head internal hexagonal screw (6), make axle sleeve (2) and described main shaft (1) locking.

3. the standard eccentric shaft of adjustable eccentric distance according to claim 1, is characterized in that, at described main shaft (1) two ends, one center hole (1-3) arranged respectively.