CN220636957U - Rotary center frame of numerical control lathe - Google Patents

Abstract

The utility model relates to a revolving center frame of a numerical control lathe, which comprises a shell, a shaft sleeve, a belt pulley, an end cover and a clamping head, wherein the shaft sleeve is transversely and rotatably arranged in the shell in a penetrating way; the adjusting mechanism comprises a seat sleeve concentrically and detachably fixed at the left end of the shaft sleeve, a sliding sleeve concentrically and detachably fixed at the left end of the chuck and inserted into the left end of the shaft sleeve, and a disc spring sleeved outside the sliding sleeve; according to the utility model, the initial inner diameter of the conical head part on the clamp can be adjusted according to the outer diameter of the bar so as to remarkably enlarge the application range; in addition, the use is greatly facilitated and the cost is effectively reduced.

Description

Rotary center frame of numerical control lathe

Technical Field

The utility model relates to a revolving center frame of a numerical control lathe.

Background

The longitudinal cutting type numerical control lathe clamps the bar through a chuck in the rotary center frame, provides the rotating power of the bar, and performs cutting machining on the bar by matching with a cutter on the numerical control lathe; in order to enable the bar to pass through the chuck smoothly, the inner diameter of the chuck must be larger than the outer diameter of the bar, namely a certain gap must be formed between the chuck and the bar, but the gap must be right, if the gap is too small, the bar is pulled, and if the gap is too large, the machining precision is affected.

The inner diameter of the clamping head in the existing rotary center frame is fixed, so that in order to ensure that the gap between the clamping head and the bar is proper, each clamping head with different inner diameters can only be applied to the bar with single outer diameter specification, and the application range is extremely small; if the outer diameter of the bar to be processed is changed, the machine is stopped and the clamping head with the matched inner diameter is replaced to carry out subsequent processing, so that the machine is very inconvenient to use, and the cost for manufacturing the clamping head is inevitably increased, so that the machine needs to be further improved.

Disclosure of Invention

Aiming at the current state of the art, the utility model aims to provide the revolving center frame of the numerical control lathe, which remarkably expands the application range, greatly facilitates the use and effectively reduces the cost.

The technical scheme adopted for solving the technical problems is as follows: the rotary center frame of the numerical control lathe comprises a shell, a shaft sleeve, a belt pulley, an end cover and a clamping head, wherein the shaft sleeve is transversely and rotatably inserted into the shell, the belt pulley is concentrically sleeved on the shaft sleeve and positioned at the left side of the shell, the end cover is fixedly arranged at the right end of the shell and is sleeved outside the shaft sleeve, and the clamping head is concentrically arranged in the shaft sleeve; the disc spring enables the chuck to always bear left pulling force by means of the sliding sleeve.

Preferably, a first annular sinking cavity is formed in the opening at the left end of the shaft sleeve, and the root of the sliding sleeve extends into the first annular sinking cavity; the left end outer peripheral surface of the chuck is provided with a first external thread part, correspondingly, the inner peripheral surface of the root opening of the sliding sleeve is provided with a first internal thread part, and the first internal thread part is sleeved on the first external thread part in a threaded manner.

Preferably, a second external thread part is formed on the outer circumferential surface of the left end of the shaft sleeve, and correspondingly, a second internal thread part is formed on the inner circumferential surface of the seat sleeve, and the second internal thread part is sleeved on the second external thread part in a threaded manner.

Preferably, a second annular sinking cavity is formed in the left end opening of the belt wheel, and the root of the seat sleeve extends into the second annular sinking cavity.

Preferably, a pressing ring is further sleeved outside the end part of the sliding sleeve, an annular flanging is formed right on the outer side edge of the pressing ring, a third internal thread part is formed on the inner wall of the annular flanging, correspondingly, a third external thread part is formed on the outer peripheral surface of the diameter-expanding part, and the third external thread part is inserted into the third internal thread part in a threaded connection mode.

Compared with the prior art, the utility model has the advantages that: according to the utility model, the initial inner diameter of the cone head part on the clamp can be adjusted according to the outer diameter of the bar stock, and the adjustment state is kept by means of the disc spring without loosening, so that the bar stock with different outer diameter specifications can have proper gaps with the inner wall of the cone head part, and the application range is remarkably enlarged; in addition, the utility model can solve the problem without frequently disassembling and assembling the clamping heads and only needs one clamping head, thereby greatly facilitating the use and effectively reducing the cost.

Drawings

Fig. 1 is a front sectional view of the present utility model.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

In order to keep the following description of the embodiments of the present utility model clear and concise, the detailed description of known functions and known components thereof have been omitted.

As shown in fig. 1, a revolving center frame of a numerically controlled lathe comprises a shell 1, a shaft sleeve 2 which is transversely and rotatably inserted in the shell 1, a belt pulley 5 which is concentrically sleeved on the shaft sleeve 2 and positioned at the left side of the shell 1, an end cover 4 which is fixed at the right end of the shell 1 and is hermetically sleeved outside the shaft sleeve 2, and a chuck 3 which is concentrically arranged in the shaft sleeve 2; the right end opening of the shaft sleeve 2 is internally provided with a conical surface part 21 which is arranged in a circumferential direction, correspondingly, the right end of the chuck 3 is outwards provided with a conical head part 31, the conical head part 31 is movably embedded in the conical surface part 21 and can be inwards extruded or outwards expanded under the cooperation of the conical surface part 21 to change the inner diameter, so that a bar 10 passing through the chuck 3 is clamped or loosened, and the structure and the principle are all in the prior art; the utility model is characterized in that: the adjusting mechanism comprises a seat sleeve 6 concentrically and spirally fixed at the left end of the shaft sleeve 2, a sliding sleeve 7 concentrically and spirally fixed at the left end of the chuck 3 and inserted into the left end of the shaft sleeve 2, and a disc spring 8 sleeved outside the sliding sleeve 7, wherein the outer circumferential surface of the sliding sleeve 7 is in sliding fit with the inner circumferential surface of the shaft sleeve 2, the end part of the sliding sleeve 7 extends out of the left end of the seat sleeve 6, an expanding part 62 concentrically arranged is outwards formed on the outer circumferential surface of the end part of the seat sleeve 6, an annular expanding cavity 63 is formed on the inner wall of an opening of the end part of the seat sleeve 6, correspondingly, a retainer ring 71 annularly arranged is outwards formed on the outer wall of the end part of the sliding sleeve 7, the disc spring 8 is arranged in the annular expanding cavity 63, the outer edge of the right side of the disc spring 8 is tightly pressed on the bottom surface of the annular expanding cavity 63, and the inner edge of the left side of the disc spring 8 is tightly pressed on the right side of the root part of the retainer ring 71; the disc spring 8 always pulls the chuck 3 to the left by means of the sliding sleeve 7.

A first annular sinking cavity 23 is formed in the opening of the left end of the shaft sleeve 2, and the root of the sliding sleeve 7 extends into the first annular sinking cavity 23; the left end outer circumferential surface of the chuck 3 is formed with a first external screw thread portion 32, and correspondingly, the inner circumferential surface of the root opening of the sliding sleeve 7 is formed with a first internal screw thread portion 72, and the first internal screw thread portion 72 is sleeved and screwed on the first external screw thread portion 32.

The left end outer peripheral surface of the sleeve 2 is formed with a second male screw portion 22, and correspondingly, the inner peripheral surface of the sleeve 6 is formed with a second female screw portion 61, and the second female screw portion 61 is engaged with the second male screw portion 22.

A second annular sinking cavity 51 is formed in the left end opening of the belt wheel 5, and the root of the seat cover 6 extends into the second annular sinking cavity 51.

The end of the sliding sleeve 7 is further sleeved with a pressing ring 9, an annular flanging 91 is formed right on the outer edge of the pressing ring 9, a third internal thread portion 92 is formed on the inner wall of the annular flanging 91, correspondingly, a third external thread portion 64 is formed on the outer peripheral surface of the expanding portion 62, and the third external thread portion 64 is inserted and screwed into the third internal thread portion 92.

Working principle: the utility model is arranged in the nose of the numerical control lathe, the driving motor is arranged in the nose of the numerical control lathe, the driving belt pulley is fixed on the rotating shaft of the driving motor, the position of the driving belt pulley is matched with the position of the belt pulley 5, and finally a belt is sleeved between the driving belt pulley and the belt pulley 5, so that when the rotating shaft of the driving motor rotates, the shaft sleeve 2 is driven to rotate in the shell 1 by the driving belt pulley, the belt pulley 5 and the belt; before the shaft sleeve 2 rotates, the bar 10 is transversely inserted into the chuck 3, a traction mechanism capable of moving left and right is arranged at the head of the numerically controlled lathe, the moving end of the traction mechanism is fixed with the left end of the sliding sleeve 7, when the moving end of the traction mechanism moves leftwards, the chuck 3 is driven to move leftwards by the sliding sleeve 7, and the inner diameter at the conical head 31 is gradually reduced by the mutual matching of the conical head 31 and the conical surface 21, so that the bar 10 is finally clamped.

When the outer diameter of the bar 10 is changed, the initial inner diameter at the conical head part 31 needs to be adjusted, the sliding sleeve 7 is rotated during adjustment, the chuck 3 is not rotated, and the chuck 3 is driven to move leftwards or rightwards according to the principle of spiral connection, so that the inner diameter at the conical head part 31 can be reduced or increased to adapt to the outer diameter of the bar 10, and the chuck 3 is always subjected to leftwards pulling force due to the arrangement of the disc spring 8, so that the change of the inner diameter can be maintained to prevent loosening; if the sliding sleeve 7 moves leftwards too far to greatly reduce the rebound force of the disc spring 8, the seat cover 6 can be rotated to drive the seat cover 6 to move leftwards by means of the threaded connection between the second internal thread part 61 and the second external thread part 22, so that the distance between the left end of the seat cover 6 and the left end of the sliding sleeve 7 is reduced, and the disc spring 8 is slowly compressed to increase the rebound force of the disc spring 8.

According to the utility model, the initial inner diameter of the conical head part 31 positioned on the chuck 3 can be adjusted according to the outer diameter of the bar 10, and the adjustment state is kept by means of the disc spring 8 without loosening, so that the bar with different outer diameter specifications can be ensured to have proper gaps with the inner wall of the conical head part 31, and the application range is remarkably expanded; in addition, the utility model can solve the problem without frequently disassembling the clamping heads 3 and only needing one clamping head 3, thereby greatly facilitating the use and effectively reducing the cost.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; while the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications may be made to the techniques described in the foregoing embodiments, or that certain features may be substituted for those illustrated therein; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (5)

1. The rotary center frame of the numerical control lathe comprises a shell, a shaft sleeve, a belt pulley, an end cover and a clamping head, wherein the shaft sleeve is transversely and rotatably inserted into the shell, the belt pulley is concentrically sleeved on the shaft sleeve and positioned at the left side of the shell, the end cover is fixedly arranged at the right end of the shell and is sleeved outside the shaft sleeve, and the clamping head is concentrically arranged in the shaft sleeve; the disc spring enables the chuck to always bear left pulling force by means of the sliding sleeve.

2. The rotary center frame of the numerically controlled lathe according to claim 1, wherein a first annular sinking cavity is formed in the opening at the left end of the shaft sleeve, and the root of the sliding sleeve extends into the first annular sinking cavity; the left end outer peripheral surface of the chuck is provided with a first external thread part, correspondingly, the inner peripheral surface of the root opening of the sliding sleeve is provided with a first internal thread part, and the first internal thread part is sleeved on the first external thread part in a threaded manner.

3. The turning center frame of a numerically controlled lathe according to claim 2, wherein a second external thread portion is formed on an outer circumferential surface of a left end of the sleeve, and correspondingly, a second internal thread portion is formed on an inner circumferential surface of the sleeve, and the second internal thread portion is sleeved on the second external thread portion in a threaded manner.

4. The rotary center frame of the numerically controlled lathe according to claim 3, wherein a second annular sinking cavity is formed in the left end opening of the belt wheel, and the root of the seat sleeve extends into the second annular sinking cavity.

5. The turning center frame of a numerically controlled lathe according to claim 4, wherein a pressing ring is further sleeved outside the end portion of the sliding sleeve, an annular flanging is formed right on the outer edge of the pressing ring, a third internal thread portion is formed on the inner wall of the annular flanging, correspondingly, a third external thread portion is formed on the outer peripheral surface of the diameter-expanding portion, and the third external thread portion is inserted into and screwed into the third internal thread portion.