CN202106044U - Center adjustment mechanism of center sleeve - Google Patents

Abstract

A center adjustment mechanism of a center sleeve comprises a tailstock sleeve arranged in a machine tool tailstock and a center sleeve arranged in the tailstock sleeve. The center sleeve center and the tailstock sleeve center are eccentrically arranged. One lateral wall of the machine tool tailstock is provided with a through hole, an eccentric shaft is installed in the through hole, and a bearing is installed at the tail end of the eccentric shaft. The tailstock sleeve is provided with a long groove corresponding to the through hole on the machine tool tailstock, width of the long groove is matched with the external diameter of the bearing, and the bearing is located in the long groove. The center adjustment mechanism of the center sleeve adjusts the position of the center sleeve center within a certain range by using the eccentric shaft, and further with the eccentric arrangement of the center sleeve center and the tailstock sleeve center, maintenance and replacement requirements during assembly are lowered. In addition, accuracy of the machine tool can be conveniently adjusted after the machine tool is used for a period of time and accuracy is lowered.

Description

A kind of center sleeve center guiding mechanism

Technical field

The utility model relates to machine tool, particularly a kind of center sleeve center guiding mechanism.

Background technology

On lathe and complex milling machine tool, the equal altitudes requirement that the head of a bed and tailstock two are top depends primarily on the machining accuracy of parts such as main spindle box, tailstock, base plate and lathe bed.And this assembly precision is difficult to directly guaranteed by the machining accuracy of related components.Aborning, often process related components, when assembling, then adopt the certain process measure, thereby form different assembly methods, guarantee assembly precision by the precision of less expensive.

When lathe and complex milling machine tool assembling, the process means of selecting for use usually has:

Apolegamy when 1, producing in batches;

2, guarantee assembly precision through the repair base plate;

3, guarantee assembly precision through the match grinding adjusting pad;

In actual production, normally three kinds of methods are combining use, and apolegamy earlier guaranteeing assembly precision through repair base plate and match grinding adjusting pad then.So not only waste time and energy, and require high workman's experience level.When lathe in use for some time, its precision can constantly descend, and wants to let it return to the precision difficulty more just when dispatching from the factory.

Summary of the invention

The purpose of the utility model is to design a kind of center sleeve center guiding mechanism; Utilize eccentric mechanism to adjust the position at center sleeve center within the specific limits; To the requirement of repair precision, and after lathe use a period of time precise decreasing, also can adjust its precision very easily when reducing assembling.

For achieving the above object, the technical scheme of the utility model is:

A kind of center sleeve center guiding mechanism comprises, is located at barrel of tail stock and the interior center sleeve of barrel of tail stock in the tailstock tool; Wherein, described center sleeve center becomes an arranged off-centre with the barrel of tail stock center; Described tailstock tool one sidewall is offered a through hole, adorns an eccentric shaft in the through hole, and the eccentric shaft end is adorned a bearing; Through hole is offered an elongated slot on the corresponding tailstock tool of described barrel of tail stock, and groove width cooperates with the external diameter of bearing, and bearing is positioned at elongated slot.

Further, groove is also offered on the through hole top of described tailstock tool sidewall, passes the sheathed successively dish spring in groove eccentric shaft top, briquetting, gland, and is fixed in the groove by a cover plate and screw.

In addition, the maximum adjustment amount b in relative archicenter, the said barrel of tail stock of the utility model center is:

α＝arctan[(e+d/2)/(D/2)]

b＝sin(90°-β+α)×L-sin(90°-β-α)×L＝2cos(90°-β)sinα×L

Wherein, tailstock tool is installed on the oblique lathe bed that becomes the β angle with ground, bearing outside diameter d, mm; The eccentric e of eccentric shaft, mm; Eccentric shaft forwards the angle of extreme position and initial position to, and the position that eccentric shaft is placed and the angle of level ground are 90 °-β, barrel of tail stock D outer diameter, mm; Barrel of tail stock center and tailstock sleeve center eccentricity L, mm.

Rotation eccentric axis will drive angle of barrel of tail stock rotation.The center sleeve center becomes a small eccentricity L with the barrel of tail stock center, when barrel of tail stock rotated, the center sleeve center also can rotate with respect to the sleeve center, thereby changes the position at center sleeve center.

The advantage of the utility model is:

The utility model is that the center sleeve center becomes an eccentric L with the barrel of tail stock center through two eccentric structures, and through eccentric shaft adjustment center sleeve center, realizes the fine setting at barrel of tail stock center, and is easy to adjust.

Description of drawings

Fig. 1 is the structural scheme of mechanism of the utility model one embodiment.

Fig. 2 is the A-A cutaway view of Fig. 1.

The specific embodiment

Referring to Fig. 1, Fig. 2, a kind of center sleeve center guiding mechanism of the utility model comprises, is located at barrel of tail stock 2 and the center sleeve 3 in the barrel of tail stock 2 in the tailstock tool 1; Wherein, described center sleeve 3 centers become an arranged off-centre with barrel of tail stock 2 centers; Described tailstock tool 1 one sidewalls are offered a through hole 101, adorn an eccentric shaft 4 in the through hole 101, and eccentric shaft 4 ends are adorned a bearing 5, and it is with an eccentricity value e; Through hole 101 is offered an elongated slot 201 on the described barrel of tail stock 2 corresponding tailstock tools 1, and groove width cooperates with the external diameter of bearing 5, and bearing 5 is positioned at elongated slot 201.

Further, groove 102 is also offered on through hole 101 tops of described tailstock tool 1 sidewall, passes the sheathed successively dish spring in groove 102 eccentric shafts 4 tops 6, briquetting 7, gland 8, and is fixed in the groove 102 by a cover plate 9 and screw 10,10 '.

Unclamp the screw 10 ' on the gland 8; Drive barrel of tail stock 2 around angle of its axis rotation through rotation eccentric axis 4; Because an eccentric L is also made at center sleeve 3 centers and barrel of tail stock 2 centers; Center sleeve 3 is a pivot with barrel of tail stock 2 centers, and both eccentric throws are the radius of turn rotation, thereby realizes the adjustable of barrel of tail stock center.After adjusting, tighten screw 10 ', this moment, the dish spring can play the locking effect of locking.

Referring to Fig. 1, it is depicted as the utility model one embodiment, and tailstock tool 1 is installed on the oblique lathe bed that becomes the β angle with ground, bearing outside diameter d, mm; The eccentric e of eccentric shaft, mm; Eccentric shaft forwards the angle of extreme position and initial position to; The position that eccentric shaft is placed and the angle of level ground are 90 °-β; The barrel of tail stock D outer diameter, mm; Barrel of tail stock center and tailstock sleeve center eccentricity L, mm, the calculating of the maximum adjustment amount b in relative archicenter, its barrel of tail stock center:

α＝arctan[(e+d/2)/(D/2)]

b＝sin(90°-β+α)×L-sin(90°-β-α)×L＝2cos(90°-β)sinα×L。

Example: e=8mm, d=30mm, D=180mm, L=1.5mm, β=60 °.

α＝arctan[(8+30/2)/(180/2)]＝14.34°；

b＝2cos30°sinα×L＝2cos30°sin14.34°×1.5＝0.643。

Like this, rotation eccentric axis will drive angle of barrel of tail stock rotation.The center sleeve center becomes a small eccentricity L with the barrel of tail stock center, when barrel of tail stock rotated, the center sleeve center also can rotate with respect to the sleeve center, thereby changes the position at center sleeve center.

Claims (3)

1. a center sleeve center guiding mechanism comprises, is located at barrel of tail stock and the interior center sleeve of barrel of tail stock in the tailstock tool; It is characterized in that,

Described center sleeve center becomes an arranged off-centre with the barrel of tail stock center;

Described tailstock tool one sidewall is offered a through hole, adorns an eccentric shaft in the through hole, and the eccentric shaft end is adorned a bearing;

Through hole is offered an elongated slot on the corresponding tailstock tool of described barrel of tail stock, and groove width cooperates with the external diameter of bearing, and bearing is positioned at elongated slot.

2. center sleeve as claimed in claim 1 center guiding mechanism; It is characterized in that; Groove is also offered on the through hole top of described tailstock tool sidewall, passes the sheathed successively dish spring in groove eccentric shaft top, briquetting, gland, and is fixed in the groove by a cover plate and screw.

3. center sleeve as claimed in claim 1 center guiding mechanism is characterized in that, the maximum adjustment amount b in relative archicenter, said barrel of tail stock center is:

α＝arctan[(e+d/2)/(D/2)]

b＝sin(90°-β+α)×L-sin(90°-β-α)×L＝2cos(90°-β)sinα×L

Wherein, tailstock tool is installed on the oblique lathe bed that becomes the β angle with ground, bearing outside diameter d, mm; The eccentric e of eccentric shaft, mm; Eccentric shaft forwards the angle of extreme position and initial position to, and the position that eccentric shaft is placed and the angle of level ground are 90 °-β, barrel of tail stock D outer diameter, mm; Barrel of tail stock center and tailstock sleeve center eccentricity L, mm.

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