CN103042239A - Mounting structure of machine tool centre and centre shaft - Google Patents

Abstract

The invention discloses a mounting structure of a machine tool centre and a centre shaft. A mounting portion on the right of the centre is sleeved into a mounting hole on the left of the centre shaft, the right of the centre is a Morse taper section, and the mounting hole on the left of the centre shaft is a Morse taper hole. A large-diameter section, a small-diameter section and a key tooth section are arranged in the middle of an axial body of the centre from left to right, key teeth are arranged on the external circular surface of the key tooth section, a check ring is sleeved in the middle of the centre, the right of an inner hole of the check ring is in clearance fit with the key tooth section of the centre, the left of the inner hole of the check ring I in clearance fit with the small-diameter section of the centre, key grooves are reserved at positions, corresponding to the key teeth on the key tooth section, on the left of the inner hole of the check ring, a stopper is formed between each two adjacent key grooves and clamped between the right end face of the small-diameter section and the corresponding key tooth on the key tooth section, a nut sleeve is sleeved outside the check ring, and the right of an inner hole of the nut sleeve is in threaded connection with the left of the external circular surface of the centre. The mounting structure is not only convenient for calibration of the centre but also capable of guaranteeing matching precision of the centre and the centre shaft, and is further convenient for mounting and demounting of the centre.

Description

The top mounting structure with tail spindle of a kind of lathe

Technical field

The invention belongs to the top field of lathe, specifically, relate in particular to the top mounting structure with tail spindle of lathe.

Background technology

As shown in Figure 1, top and the tail spindle mounting structure of traditional lathe, comprise top 1 and tail spindle 2, wherein top 1 right part is inserted in the installing hole of tail spindle 2 left parts, both fit systems are columniform matched in clearance, and top 1 is fixed together by four attachment screws 7 and tail spindle 2.It is pointed out that the purpose that adopts above-mentioned mounting structure is to be the laggard replacing of convenient top damage.

Yet also there is very large defective in the conventional mounting structure, that is: must proofread and correct top and axiality tail spindle before the processing and beat, and the requirement of axiality height, and the requirement of GB is≤0.05mm, so just causes top 1 correction to bother very much.In addition because top 1 and tail spindle 2 between be matched in clearance, when being subject to shock loading in the process top 1 and tail spindle 2 between easily produce relative displacement, so just be difficult for the quality of fit between assurance top 1 and the tail spindle 2, thereby affect machining accuracy.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of lathe top mounting structure with tail spindle, with convenient top correction and dismounting, and guarantees quality of fit between top and the tail spindle.

Technical scheme of the present invention is as follows: the top mounting structure with tail spindle of a kind of lathe, comprise top (1) and tail spindle (2), wherein the left part of top (1) is conical section, the installation portion of this top right part is inserted in the installing hole of described tail spindle (2) left part, it is characterized in that: the right part of described top (1) is the Morse's taper section, and the installing hole of described tail spindle (2) left part is corresponding mohs tapered bore;

The middle part of described top (1) axle body is followed successively by large footpath section (1a), path section (1b) and key tooth section (1c) from left to right, wherein the external diameter of key tooth section (1c) is greater than described path section (1b), and has the key tooth that at least two edges circumferentially arrange on the periphery of key tooth section (1c); Described top (1) middle part is set with back-up ring (3), key tooth section (1c) matched in clearance of the right part of this back-up ring endoporus and top (1), and path section (1b) matched in clearance of the left part of back-up ring (3) endoporus and top (1); Key tooth place on the left part corresponding keys tooth section (1c) of described back-up ring (3) endoporus has keyway (3a), and be formed with a block (3b) between adjacent two keyways (3a), this block is clipped between the right side and the key tooth on the key tooth section (1c) of described path section (1b);

Described back-up ring (3) overcoat has nut sleeve (4), the two matched in clearance, the right part of this nut sleeve endoporus is threaded with the left part of described top (1) periphery, and in the radial hole at nut sleeve (4) middle part, lock-screw (5) is housed, the inner of this lock-screw snaps in the cannelure (3c) on described back-up ring (3) outer wall.

In the present invention, fit system between described top (1) and the tail spindle (2) is adjusted into present Morse's taper and cooperates, and the self-centering performance of Morse's taper is fine, facilitates like this correction of top (1), and can guarantee simultaneously the quality of fit between top and the tail spindle.In addition, for the ease of dismounting top (1) and with top (1) firm purpose is installed, this mounting structure has been set up back-up ring (3), nut sleeve (4) and lock-screw (5).

Adopt above mounting structure, the present invention is convenient top correction not only, and can guarantee simultaneously the quality of fit between top and the tail spindle, can also make things convenient for top dismounting, has overcome well the defective of conventional mounting structure, has good applicability.

As preferably, have four key teeth on the periphery of described key tooth section (1c), these four key teeth are along circumferentially evenly arranging.Certainly, we also can select the key tooth of other numbers as required, such as 3,5,6, are not limited to the concrete number in the present embodiment.

Beneficial effect: the present invention is convenient top correction not only, and can guarantee simultaneously the quality of fit between top and the tail spindle, can also make things convenient for top dismounting, has overcome well the defective of conventional mounting structure, has good applicability.

Description of drawings

Fig. 1 is the schematic diagram of mounting structure before improving;

Fig. 2 is for improving the schematic diagram of post-mounting structure;

Fig. 3 is top 1 structural representation among Fig. 2;

Fig. 4 is the side view of Fig. 3;

Fig. 5 is the structural representation of Fig. 2 guide ring 3;

Fig. 6 is the cutaway view of Fig. 5.

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples:

Shown in Fig. 2 to 6, this mounting structure is made of top 1, tail spindle 2, back-up ring 3, nut sleeve 4, lock-screw 5 and dead head 6.Wherein, described tail spindle 2 is installed in the installing hole of dead head 6, and its mounting structure adopts existing structure, does not do at this and gives unnecessary details.

Described top 1 right part is inserted in the installing hole of tail spindle 2 left parts.As one of improvement of the present invention, above-mentioned top 1 right part is the Morse's taper section, and the installing hole of tail spindle 2 left parts is corresponding mohs tapered bore.

As two of improvement of the present invention, the middle part of described top 1 axle body is followed successively by large footpath section 1a, path section 1b and key tooth section 1c from left to right, wherein the external diameter of key tooth section 1c is greater than described path section 1b, and has the key tooth that at least two edges circumferentially arrange on the periphery of key tooth section 1c.As preferably, have four key teeth on the periphery of described key tooth section 1c, these four key teeth are along circumferentially evenly arranging.

Can find out that from Fig. 2 to 6 described top 1 middle part is set with back-up ring 3, the right part of these back-up ring 3 endoporus and top 1 key tooth section 1c matched in clearance, and the path section 1b matched in clearance of the left part of back-up ring 3 endoporus and top 1.Key tooth place on the left part corresponding keys tooth section 1c of described back-up ring 3 endoporus has keyway 3a, and is formed with a block 3b between adjacent two keyway 3a, and this block 3b is clipped between the right side and the key tooth on the key tooth section 1c of described path section 1b.

Described back-up ring 3 overcoats have nut sleeve 4, the two matched in clearance, and the right part of this nut sleeve endoporus is threaded with the left part of described top 1 periphery.In the radial hole at described nut sleeve 4 middle parts lock-screw 5 is housed, the inner of this lock-screw 5 snaps in the cannelure 3c on described back-up ring 3 outer walls.

The above only is preferred embodiment of the present invention, not take the present invention as restriction, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (2)

1. the top mounting structure with tail spindle of a lathe, comprise top (1) and tail spindle (2), wherein the left part of top (1) is conical section, the installation portion of this top right part is inserted in the installing hole of described tail spindle (2) left part, it is characterized in that: the right part of described top (1) is the Morse's taper section, and the installing hole of described tail spindle (2) left part is corresponding mohs tapered bore;

The middle part of described top (1) axle body is followed successively by large footpath section (1a), path section (1b) and key tooth section (1c) from left to right, wherein the external diameter of key tooth section (1c) is greater than described path section (1b), and has the key tooth that at least two edges circumferentially arrange on the periphery of key tooth section (1c); Described top (1) middle part is set with back-up ring (3), key tooth section (1c) matched in clearance of the right part of this back-up ring endoporus and top (1), and path section (1b) matched in clearance of the left part of back-up ring (3) endoporus and top (1); Key tooth place on the left part corresponding keys tooth section (1c) of described back-up ring (3) endoporus has keyway (3a), and be formed with a block (3b) between adjacent two keyways (3a), this block is clipped between the right side and the key tooth on the key tooth section (1c) of described path section (1b);

Described back-up ring (3) overcoat has nut sleeve (4), the two matched in clearance, the right part of this nut sleeve endoporus is threaded with the left part of described top (1) periphery, and in the radial hole at nut sleeve (4) middle part, lock-screw (5) is housed, the inner of this lock-screw snaps in the cannelure (3c) on described back-up ring (3) outer wall.

2. the top mounting structure with tail spindle of described lathe according to claim 1, it is characterized in that: have four key teeth on the periphery of described key tooth section (1c), these four key teeth are along circumferentially evenly arranging.

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