CN220445062U - Spindle box - Google Patents

Abstract

The utility model discloses a spindle box, wherein through holes are formed in the side walls of the spindle box, and the through holes in the two side walls are oppositely arranged; the rotary shaft is composed of a mandrel and a spacer bush; the mandrel penetrates through a through hole and is connected with the spacer bush; the spacer bush is provided with an eccentric pipe, and the eccentric pipe penetrates through the other through hole and is sleeved on the outer side of the mandrel; and the spacer bush and the mandrel rotate relatively, and the concentricity of the spacer bush and the mandrel is corrected. The rotating shaft comprises the spacer bush and the mandrel, the spacer bush is provided with the eccentric tube, the eccentric tube is connected with the mandrel and rotates relatively, the inner wall of the eccentric tube is propped against the mandrel, so that the mandrel is slightly offset, the concentricity of the mandrel and the spacer bush is corrected, the deviation between the centers of the two through holes is reduced, the problems in the prior art are solved, the precision is improved, and the application range of the spindle box is further widened.

Description

Spindle box

Technical Field

The utility model relates to the field of numerical control machining centers, in particular to a high-precision spindle box used for a numerical control machining center.

Background

The numerical control machining center is provided with a tool magazine, the spindle is used for carrying out tool replacement operation according to workpiece machining requirements through the tool changing arm, continuous machining from raw materials to finished products is achieved, and the spindle is matched with a tool changing bar through the spindle box in the tool changing process, for example, a spindle waterproof tool setting device disclosed in Chinese patent grant publication No. CN213945781U is used.

The cutter rod is rotatably assembled in the spindle box through the rotating shaft, and two through holes are required to be formed in the side wall of the spindle box for the installation of the rotating shaft. In the actual production operation process, because the main spindle box has the characteristics of large weight and large volume, the operation of single-sided punching is adopted, namely: after one side wall is provided with a hole, the other side wall is provided with holes, and obviously, the two sides are provided with holes, so that the center of the circle for providing the two holes is deviated, the deviation of a rotating shaft assembled through the two holes is caused, the allowable deviation range is not more than 0.005cm under the general condition, but the deviation range in the actual machining operation even reaches 0.007cm to 0.1cm, the precision is greatly reduced, the motion precision of a cutter rod is influenced, and the cutter rod cannot be applied to a high-precision machining center, so that the application range is reduced.

Therefore, on the basis of the existing machining operation, how to utilize the structural design or improvement of the rotating shaft to reduce the center deviation of the hole is one of the technical problems to be solved by those skilled in the art.

Disclosure of Invention

In order to solve the technical problems in the prior art, the utility model aims to provide a high-precision spindle box used for a numerical control machining center.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the side wall of the main shaft box is provided with through holes, and the through holes of the two side walls are oppositely arranged;

the rotary shaft is composed of a mandrel and a spacer bush;

the mandrel penetrates through a through hole and is connected with the spacer bush;

the spacer bush is provided with an eccentric pipe, and the eccentric pipe penetrates through the other through hole and is sleeved on the outer side of the mandrel;

and the spacer bush and the mandrel rotate relatively, and the concentricity of the spacer bush and the mandrel is corrected.

Further preferred is: the spacer comprises an integrally connected annular plate and the eccentric tube, wherein:

the annular plate is propped against the side wall and provided with an adjusting hole;

the adjusting hole is communicated with the locking hole of the side wall to form a locking channel;

the adjusting holes are arc-shaped through holes.

Further preferred is: the side wall is provided with an annular groove, and the annular plate is arranged in the annular groove.

Further preferred is: the dabber includes integrally connected's spindle nose board and axis body, wherein:

the shaft head plate is arranged at one end of the shaft body and abuts against the side wall;

the shaft body passes through the through hole and is inserted into the eccentric tube;

the shaft head plate is provided with the adjusting hole, and the adjusting hole is communicated with the locking hole of the side wall to form a locking channel;

the adjusting holes are arc-shaped through holes.

Further preferred is: the side wall is provided with an annular groove, and the shaft head plate is arranged in the annular groove.

Further preferred is: the three regulating holes are distributed in a triangle shape.

Further preferred is: the locking channel is fitted with a connector.

Further preferred is: the connecting piece is a screw or a screw rod or a pin rod.

After the technical scheme is adopted, compared with the background technology, the utility model has the following advantages:

the rotating shaft comprises the spacer bush and the mandrel, the spacer bush is provided with the eccentric tube, the eccentric tube is connected with the mandrel and rotates relatively, the inner wall of the eccentric tube is propped against the mandrel, so that the mandrel is slightly offset, the concentricity of the mandrel and the spacer bush is corrected, the deviation between the centers of the two through holes is reduced, the problems in the prior art are solved, the precision is improved, and the application range of the spindle box is further widened.

Drawings

Fig. 1 is a schematic perspective view of a headstock according to an embodiment of the present utility model;

FIG. 2 is an exploded schematic illustration of the structure of FIG. 1;

FIG. 3 is a second exploded view of the structure of FIG. 1;

FIG. 4 is a side view of the structure shown in FIG. 1;

FIG. 5 is an enlarged view of a portion of the structure shown in FIG. 4 (i.e., a schematic view of the relative rotation of the mandrel and spacer);

fig. 6 is a sectional view of the structure of the headstock in the embodiment of the present utility model.

The reference numerals in the above description are as follows:

100. a spindle box; 110. a through hole; 120. an annular groove; 121. a locking hole;

200. a mandrel; 210. a shaft head plate; 220. a shaft body;

300. a spacer bush; 310. an annular plate; 320. an eccentric tube;

400. and adjusting the hole.

Detailed Description

In the prior art, the centers of two holes mounted on the spindle box and matched with the rotating shaft have deviation, so that the rotating shaft assembled through the two holes has deviation, the allowable deviation range is not more than 0.005cm in general, but the deviation range in actual machining operation even reaches 0.007cm to 0.1cm, the precision is greatly reduced, the motion precision of the tool bar is influenced, and meanwhile, the tool bar cannot be applied to the high-precision machining center, and the application range is reduced.

The inventor aims at the technical problems, and researches and discovers a spindle box through analysis of reasons, wherein the side wall of the spindle box is provided with through holes, and the through holes of the two side walls are oppositely arranged;

the rotary shaft is composed of a mandrel and a spacer bush;

the mandrel penetrates through a through hole and is connected with the spacer bush;

the spacer bush is provided with an eccentric pipe, and the eccentric pipe penetrates through the other through hole and is sleeved on the outer side of the mandrel;

and the spacer bush and the mandrel rotate relatively, and the concentricity of the spacer bush and the mandrel is corrected.

In the above technical scheme, the pivot comprises spacer and dabber, and the spacer has eccentric pipe, utilizes eccentric pipe and dabber to be connected and relative rotation, the inner wall of eccentric pipe supports and presses the dabber for the dabber carries out the skew a little, and then corrects the concentricity of dabber and spacer, thereby reduces the deviation between the centre of a circle of two through-holes, solves the problem that exists among the prior art, thereby improves the precision, also further widens the application scope of headstock.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be noted that, in the present utility model, terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element of the present utility model must have a specific orientation, and thus should not be construed as limiting the present utility model.

Examples

The main shaft box is used for assembling a main shaft and a tool bar matched with the main shaft for tool changing, round holes are formed in two side walls of the main shaft box, two round holes form an assembling channel, a rotating shaft is arranged in the assembling channel, and the tool bar is rotatably connected with the main shaft box through the rotating shaft; in actual processing, certain deviation exists in the circle centers of the two round holes, the deviation directly influences the precision, the speed and the like of tool changing, and the rotating shaft adopts a structure for concentricity adjustment according to actual conditions, so that the circle center deviation in the two round holes is compensated.

Referring to fig. 1 to 6, the headstock 100 includes a top plate, a bottom plate, a left side wall, a right side wall and a back plate, the left side wall and the right side wall are opposite and spaced apart, the back plate is connected with the left side wall and the right side wall, the back plate, the left side wall and the right side wall are enclosed to form a box bracket, the top end of the box bracket is connected with the top plate, the bottom end of the box bracket is connected with the bottom plate, and obviously, an opening surface is arranged between the left side wall and the right side wall which are opposite.

As shown in fig. 1 to 6, the sidewall of the headstock 100 is provided with a through hole 110, namely: the left side wall and the right side wall are provided with through holes 110, specifically: the through hole 110 on the left side wall is a left through hole, the through hole 110 on the right side wall is a right through hole, the left and right through holes are round holes, the center of the left through hole and the center of the right through hole have deviation (under the general condition, the deviation range is 0.007cm to 0.1 cm), and the left through hole and the right through hole are mutually communicated to form a rotating shaft mounting hole. It should be noted that: the left through hole and the right through hole are circular through holes 110 with the same size, and the left through hole and the right through hole are both close to the opening surface.

As shown in connection with fig. 1 to 6, it is preferable that: the through hole 110 is a countersunk hole, and includes a through hole 110 body and annular grooves 120 concentrically distributed with the through hole 110, namely: the left through hole and the right through hole are countersunk holes, and locking holes 121 are further formed in the left through hole and the right through hole. The specific method is as follows: the left through hole comprises a left through hole body and a left annular groove, the left annular groove and the left through hole body are concentrically distributed, the right through hole comprises a right through hole body and a right annular groove, and the right annular groove and the right through hole body are concentrically distributed; the bottom plate of the left annular groove is provided with a locking hole 121, the bottom plate of the right annular groove is provided with a locking hole 121, three locking holes 121 are arranged in the left annular groove, and three locking holes 121 are also arranged in the right annular groove. Each of the locking holes 121 may be a screw hole.

In this embodiment, as shown in fig. 1 to 6, the left side plate and the right side plate of the headstock 100 are not flat plates, and therefore, the left side plate and the right side plate are symmetrically distributed, specifically: the left side board and the right side board are both side boards, the left through hole and the right through hole are collectively called as a through hole 110, the through hole 110 is provided with annular grooves 120 which are concentrically distributed, the side boards comprise a flat plate part and an inclined part which are integrally connected, and the through hole 110 is positioned on the flat plate part and extends obliquely, namely: the through hole 110 is formed in the flat plate portion, and a portion of the annular groove 120 is disposed in the inclined portion.

Referring to fig. 1 to 6, the spindle is rotatably disposed in a spindle mounting hole of the headstock 100, and includes a spindle 200 and a spacer 300, and one end of the spindle 200 is inserted into the spacer 300.

Referring to fig. 1 to 6, the mandrel 200 includes a shaft head plate 210 and a shaft body 220 that are integrally connected, the shaft head plate 210 is a circular plate body, the shaft body 220 is a circular rod body with a consistent outer circle diameter, the shaft head plate 210 is fixed at one end of the shaft body 220, and the shaft head plate 210 and the shaft body 220 are concentrically distributed, namely: the circular shaft head plate 210 is disposed at one end of the shaft body 220, and the center of the shaft head plate 210 is stacked on the axis extension line of the shaft body 220 and integrally connected with the shaft body 220, so as to form a mandrel 200 with a T-shaped axial section. It should be noted that: the spindle nose plate 210 is provided with a plurality of adjusting holes 400 along the circumferential direction thereof, and each adjusting hole 400 is an arc-shaped through hole, namely: the bar-shaped holes formed along the outer edge radian of the axle head plate 210, each adjusting hole 400 needs to be matched with a screw, namely: the screw passes through the adjusting hole 400 to be matched and locked with the locking hole 121 on the bottom surface of the annular groove 120, so that the mandrel 200 is fixed; in more detail: the adjusting hole 400 is designed as an arc through hole, that is, the adjusting of the mandrel 200 is realized by utilizing the function of rotating and adjusting the position, and after the position of the mandrel 200 is determined within the range of the adjusting hole 400, the screw is locked into the locking hole 121, so that the position of the mandrel 200 is fixed.

In this embodiment: referring to fig. 1 to 6, when the spindle 200 is installed in the headstock 100, the spindle 220 is inserted into the right through hole of the right sidewall, the spindle head plate 210 is sunk into the right annular groove, and three adjustment holes 400 correspond to the three locking holes 121 in the annular groove 120, namely: the adjusting holes 400 are in one-to-one correspondence with the locking holes 121, and thus the purpose of adjusting the shaft body 220 can be achieved by rotating the shaft head plate 210 within the range of the waist-shaped holes because each adjusting hole 400 is a waist-shaped hole.

Referring to fig. 1 to 6, the spacer 300 is a tube body with a T-shaped axial section, and includes an annular plate 310 and an eccentric tube 320 integrally connected, and an inner edge of the annular plate 310 is connected to an edge of one end of the eccentric tube 320. The annular plate 310 is a torus, which is provided with three adjusting holes 400, each adjusting hole 400 is an arc through hole, namely: strip-shaped holes formed along the outer edge radian of the annular plate, each adjusting hole 400 needs to be matched with a screw, namely: the screw passes through the adjusting hole 400 to be matched and locked with the locking hole 121 on the bottom surface of the annular groove 120, so that the mandrel 200 is fixed; in more detail: the adjusting hole 400 is designed as an arc through hole, that is, the adjusting of the mandrel 200 is realized by utilizing the function of rotating and adjusting the position, and after the position of the mandrel 200 is determined within the range of the adjusting hole 400, the screw is locked into the locking hole 121, so that the position of the mandrel 200 is fixed. The eccentric tube 320 is sleeved with the shaft body 220 of the mandrel 200, namely: the shaft body 220 of the mandrel 200 is inserted into the eccentric tube 320, and the eccentric tube 320 is eccentrically disposed to rotate relative to the mandrel 200, thereby adjusting deviation.

In this embodiment: referring to fig. 1 to 6, when the spacer 300 is mounted on the headstock 100, the eccentric tube 320 of the spacer 300 is inserted into the left through hole of the left sidewall, the eccentric tube 320 is sleeved on the mandrel 200, the annular plate 310 of the spacer 300 is sunk into the left annular groove, and the three adjusting holes 400 of the annular plate 310 are disposed corresponding to the three locking holes 121 on the bottom surface of the left annular groove, namely: the adjusting holes 400 are in one-to-one correspondence with the locking holes 121, and each adjusting hole 400 is a waist-shaped hole, so that the purpose of adjusting the shaft body 220 can be achieved through rotation within the scope of the waist-shaped hole.

It should be noted that: as shown in fig. 1 to 6, the spacer 300 is connected with the mandrel 200 in a plugging manner, namely: the shaft body 220 of the mandrel 200 is inserted into the eccentric tube 320 of the spacer 300, that is: the spacer 300 and the mandrel 200 may rotate relatively, the spacer 300 is provided with an eccentric tube 320, and the spacer 300 and the mandrel 200 rotate relatively by using a hollow eccentric hole of the eccentric tube 320, so that the axial center of the spacer 300 and the axial center of the mandrel 200 may be adjusted to be in the same axial direction as far as possible, that is: the deviation between the spacer 300 fitted at the left through hole and the mandrel 200 fitted at the right through hole is reduced by not more than 0.005cm. In the process of relative rotation between the spacer 300 and the mandrel 200, the rotation stroke is the range of each adjustment hole 400, that is, the spacer 300 and the mandrel 200 are relatively rotated in the range of the adjustment hole 400, and at this time, the inner wall of the eccentric tube 320 of the spacer 300 abuts against the surface of the shaft body 220 of the mandrel 200, so that the center deviation caused by the processing process of the left and right through holes is reduced, the concentricity of the spacer 300 and the mandrel 200 is improved, the installation precision of the rotating shaft is improved, and smooth and accurate operation of the tool changing process is ensured.

Preferably: referring to fig. 1 to 6, three adjustment holes 400 on the same component are distributed in a triangle shape, and three locking holes 121 on the same component are distributed in a triangle shape, more specifically: the three adjusting holes 400 arranged on the mandrel 200 and the three adjusting holes 400 arranged on the spacer 300 are distributed in a triangle shape, and the three locking holes 121 of the left annular groove and the right annular groove are distributed in a triangle shape. In addition, the inner diameter of the left annular groove is slightly larger than the outer diameter of the annular plate, namely: when the annular plate is arranged in the left annular groove, a certain adjusting gap exists between the annular plate and the inner wall of the left annular groove; the inner diameter of the right annular groove is slightly larger than the outer diameter of the shaft head plate, namely: when the shaft head plate is arranged in the right annular groove, a certain adjusting gap exists between the shaft head plate and the inner wall of the right annular groove; the adjusting gap is arranged, so that the corresponding part can be conveniently adjusted in the annular groove in a rotating way.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims (8)

1. Headstock, its characterized in that: the side walls of the two through holes are provided with through holes, and the through holes of the two side walls are oppositely arranged;

the rotary shaft is composed of a mandrel and a spacer bush;

the mandrel penetrates through a through hole and is connected with the spacer bush;

the spacer bush is provided with an eccentric pipe, and the eccentric pipe penetrates through the other through hole and is sleeved on the outer side of the mandrel;

and the spacer bush and the mandrel rotate relatively, and the concentricity of the spacer bush and the mandrel is corrected.

2. The headstock of claim 1, wherein: the spacer comprises an integrally connected annular plate and the eccentric tube, wherein:

the annular plate is propped against the side wall and provided with an adjusting hole;

the adjusting hole is communicated with the locking hole of the side wall to form a locking channel;

the adjusting holes are arc-shaped through holes.

3. The headstock of claim 2, wherein: the side wall is provided with an annular groove, and the annular plate is arranged in the annular groove.

4. The headstock of claim 2, wherein: the dabber includes integrally connected's spindle nose board and axis body, wherein:

the shaft head plate is arranged at one end of the shaft body and abuts against the side wall;

the shaft body passes through the through hole and is inserted into the eccentric tube;

the shaft head plate is provided with the adjusting hole, and the adjusting hole is communicated with the locking hole of the side wall to form a locking channel;

the adjusting holes are arc-shaped through holes.

5. The headstock of claim 4, wherein: the side wall is provided with an annular groove, and the shaft head plate is arranged in the annular groove.

6. The headstock of claim 2 or 4, wherein: the three regulating holes are distributed in a triangle shape.

7. The headstock of claim 2 or 4, wherein: the locking channel is fitted with a connector.

8. The headstock of claim 7, wherein: the connecting piece is a screw or a screw rod or a pin rod.