CN219787371U

CN219787371U - Revolving stage mechanism and digit control machine tool

Info

Publication number: CN219787371U
Application number: CN202223206589.XU
Authority: CN
Inventors: 杨伟杰; 罗卫超
Original assignee: Shenzhen Create Century Machinery Co Ltd
Current assignee: Shenzhen Create Century Machinery Co Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-10-03
Anticipated expiration: 2032-11-29

Abstract

The utility model relates to a turntable mechanism which comprises a motor base, an electric spindle, a bridge plate and a support bearing, wherein the bridge plate is rotatably connected to one side of the motor base, the support bearing comprises an inner ring, an outer ring, a plurality of first rolling elements arranged between the inner ring and the outer ring along the radial direction of the electric spindle and a plurality of second rolling elements arranged between the inner ring and the outer ring along the axial direction of the electric spindle, the diameter of a reference circle where the plurality of first rolling elements are positioned is unequal to the diameter of a reference circle where the plurality of second rolling elements are positioned, an output shaft of the electric spindle is arranged in the motor base through the support bearing, the inner ring of the support bearing is connected with the output shaft, the outer ring of the support bearing is positioned in the motor base, and the output shaft of the electric spindle is connected with the bridge plate. The utility model also provides a digit control machine tool. The turntable mechanism provided by the technical scheme of the utility model can improve the machining precision of the numerical control machine tool.

Description

Revolving stage mechanism and digit control machine tool

Technical Field

The utility model relates to the technical field of machining centers, in particular to a machining mechanism.

Background

Common digit control machine tools can process the work piece along three axles, also have some digit control machine tools, including fourth axle machining center to can let the digit control machine tool process the work piece along four axles, current fourth axle machining center's driving piece generally adopts servo motor to drive, and servo motor's driving precision is limited, thereby leads to digit control machine tool's machining precision to be limited.

Disclosure of Invention

The utility model provides a turntable mechanism which can improve the machining precision of a numerical control machine tool.

The utility model provides a turntable mechanism which comprises a motor base, an electric spindle, a bridge plate and a supporting bearing,

the bridge plate is rotatably connected to one side of the motor base,

the support bearing comprises an inner ring, an outer ring, a plurality of first rolling elements arranged between the inner ring and the outer ring along the radial direction of the electric spindle and a plurality of second rolling elements arranged between the inner ring and the outer ring along the axial direction of the electric spindle, the diameter of a reference circle where the plurality of first rolling elements are positioned is unequal to the diameter of a reference circle where the plurality of second rolling elements are positioned,

the output shaft of the electric spindle is arranged in the motor base through a support bearing, the inner ring of the support bearing is connected with the output shaft, the outer ring of the support bearing is positioned in the motor base, and the output shaft of the electric spindle is connected with a bridge plate.

In some possible embodiments, the outer ring is fixed in the motor base through a fixing sleeve, and a fixing surface fixedly connected with the fixing sleeve is arranged on the outer ring along the axial direction of the electric spindle.

In some possible embodiments, a first mounting groove for accommodating the outer ring is formed in the fixing sleeve, the peripheral wall of the outer ring is abutted against the top wall of the first mounting groove in the radial direction, and the fixing surface is fixed on the side wall of the first mounting groove in the axial direction.

In some possible embodiments, the end face of the retaining sleeve adjacent the bridge plate is radially aligned with the end face of the outer race adjacent the bridge plate.

In some possible embodiments, the inner race has a body axially aligned with the outer race, a first retaining disk projecting axially toward one side of the body, and a second retaining disk projecting axially toward the other side of the body,

the fixed sleeve is internally provided with a second mounting groove which is used for accommodating the first fixed disc and is communicated with the first mounting groove, and the second mounting groove is farther away from the bridge plate than the first mounting groove and is closer to the axis of the electric spindle.

In some possible embodiments, the bridge plate is connected with the output shaft through a mounting disc, a spacer sleeve spaced from the mounting disc is arranged at one end, close to the bridge plate, of the output shaft, the inner ring is fixedly sleeved with the output shaft, one side, along the axial direction of the electric spindle, of the inner ring is abutted against the spacer sleeve, and the other side, along the axial direction of the electric spindle, of the inner ring is abutted against the mounting disc.

In some possible embodiments, the motor base comprises a cylinder, the periphery of the fixing sleeve is provided with a mounting ring, the mounting ring is overlapped with the cylinder along the axial direction, and the mounting ring is fixedly connected with the cylinder.

In some possible embodiments, the inner ring of the support bearing is sleeved on the periphery of the output shaft through an adjusting sleeve, and the adjusting sleeve is detachably sleeved on the outer wall of the output shaft.

In some possible embodiments, the number of the support bearings is two, and two ends of the electric spindle along the axial direction are respectively installed in the motor base through the two support bearings.

The utility model also provides a numerical control machine tool, which comprises the turntable mechanism.

According to the turntable mechanism, the electric spindle is arranged in the motor base through the supporting bearing, the supporting bearing comprises the inner ring, the outer ring, the first rolling piece and the second rolling piece, the first rolling piece is arranged along the radial direction of the electric spindle, and the second rolling piece is arranged along the axial direction of the electric spindle, so that the supporting bearing can support the electric spindle along the axial direction and the radial direction of the electric spindle.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is apparent that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained from the structures shown in these drawings without inventive labor for those skilled in the art.

Fig. 1 is a perspective view of a turntable mechanism according to an embodiment of the present utility model.

Fig. 2 is a schematic view of a part of an explosion of an electric spindle of a turntable mechanism according to an embodiment of the present utility model.

Fig. 3 is a cross-sectional view of a turntable mechanism according to an embodiment of the present utility model.

Fig. 4 is an enlarged schematic view of a in fig. 3.

DESCRIPTION OF SYMBOLS IN THE DRAWINGS

The rotary table mechanism 100, the motor base 10, the cylinder 12, the motorized spindle 20, the output shaft 21, the base 11, the cylinder 12, the adjusting sleeve 24, the mounting plate 25, the fixed sleeve 26, the sleeve body 261, the spacer 27, the mounting ring 262, the first mounting groove 263, the second mounting groove 264, the bridge plate 30, the tailstock 40, the support bearing 50, the inner ring 51, the outer ring 52, the first fixed plate 53 and the second fixed plate 54.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

For a clearer and more accurate understanding of the present utility model, reference will now be made in detail to the accompanying drawings. The accompanying drawings, in which like reference numerals refer to like elements, illustrate examples of embodiments of the utility model. It is to be understood that the proportions shown in the drawings are not to scale as to the actual practice of the utility model, and are for illustrative purposes only and are not drawn to scale.

Referring to fig. 1-4, the present utility model provides a turntable mechanism 100, which is defined as transverse in the Y-axis direction, longitudinal in the X-axis direction, and vertical in the Z-axis direction for convenience of description. The turntable mechanism 100 comprises a motor base 10, an electric spindle 20, a mounting plate 25, a bridge plate 30, a tailstock 40, a ball bearing and a support bearing 50, wherein the axial direction of the electric spindle 20 is transverse. In some other embodiments, turntable mechanism 100 may not include tailstock 40, and bridge plate 30 is suspended from one end of motor mount 10.

The motor cabinet 10 and the tailstock 40 are arranged at intervals and are opposite to each other, so that the bridge plate 30 is conveniently erected, and it can be understood that a workbench is arranged on the bridge plate 30 and can vertically rotate relative to the bridge plate 30.

The bridge plate 30 is rotatably connected between the motor base 10 and the tailstock 40, one end of the bridge plate 30 is rotatably connected with the motor base 10, and in this embodiment, one end of the bridge plate 30 is rotatably connected with the motor base 10 through the electric spindle 20.

Referring to fig. 4, the support bearing 50 includes an inner ring 51, an outer ring 52, a plurality of first rolling elements disposed between the inner ring 51 and the outer ring 52 along the radial direction of the electric spindle 20, and a plurality of second rolling elements disposed between the inner ring 51 and the outer ring 52 along the axial direction of the electric spindle 20, wherein the diameter of a reference circle where the plurality of first rolling elements are located is not equal to that of a reference circle where the plurality of second rolling elements are located, and the inner ring 51 has a body aligned with the outer ring 52 along the axial direction, a first fixing disc 53 protruding toward one side of the body along the axial direction, and a second fixing disc 54 protruding toward the other side of the body along the axial direction. The second rolling elements and the first rolling elements are cylindrical, and the interval between two adjacent second rolling elements is smaller than the interval between two adjacent balls of the ball bearing, so the support bearing 50 can improve the load along the vertical direction of the electric spindle 20 and the motor base 10 compared with the ball bearing. Specifically, the output shaft 21 of the motorized spindle 20 is mounted in the motor base 10 through the support bearing 50, the inner ring 51 of the support bearing 50 is connected with the output shaft 21, and the outer ring 52 of the support bearing 50 is positioned in the motor base 10, so that the support bearing 50 is conveniently positioned in the motor base 10. The output shaft 21 of the motorized spindle 20 is connected to the bridge plate 30.

The motor base 10 includes a base 11 and a cylinder 12 mounted on the base 11. For example, the cylinder 12 is integrally formed with the base 11. One end of the bridge plate 30 is rotatably connected to the barrel 12, and the other end of the bridge plate 30 is rotatably connected to the tailstock 40.

Referring back to fig. 2, it will be appreciated that the motorized spindle 20 itself has ball bearings that are sleeved on the outer periphery of the output shaft 21 for effecting axial rotation of the output shaft 21 relative to the barrel 12. The bearing capacity of the ball bearing in the radial direction is smaller than that of the support bearing 50, so by installing the support bearing 50, it is avoided that the output shaft 21 and the cylinder 12 are damaged by the ball bearing only by the support of the ball bearing when the spindle machines the workpiece with a large cutting force.

The support bearing 50 is disposed at an end of the motorized spindle 20 near the tailstock 40, so as to better support the radial pressure between the bridge plate 30 and the output shaft 21. For example, the end of the output shaft 21, which is close to the bridge plate 30, is fixed with the mounting plate 25, and the support bearing 50 is fixedly sleeved on the outer peripheral portion of the output shaft 21, in this embodiment, the support bearing 50 is located on the side, away from the bridge plate 30, of the mounting plate 25, so that the support bearing 50 is closer to the connection position between the bridge plate 30 and the electric spindle 20, and can better bear the radial pressure between the bridge plate 30 and the output shaft 21.

The outer ring 52 is fixed in the motor base 10 through the fixing sleeve 26, and a fixing surface fixedly connected with the fixing sleeve 26 is arranged on the outer ring 52 along the axial direction of the motorized spindle 20. For example, the outer ring 52 is provided with a through hole along the axial direction, the barrel 12 is provided with a threaded hole along the axial direction, the outer ring 52 is fixed with the barrel 12 through a fastening bolt, the fixing surface is tightly attached to the side wall of the barrel 12, so that the outer ring 52 is fixed on the barrel 12, the stability of the connection between the support bearing 50 and the barrel 12 is improved, the support bearing 50 and the barrel 12 together provide radial support force for the electric spindle 20, and the support bearing 50 can better support the electric spindle 20 along the radial direction of the electric spindle 20.

The fixed sleeve 26 is internally provided with a first mounting groove 263 for accommodating the outer ring 52, the first mounting groove 263 is annular, the outer peripheral wall of the inner Zhou Bichao of the fixed sleeve 26 is recessed for a certain distance to form the first mounting groove 263, the peripheral wall of the outer ring 52 is radially abutted against the top wall of the first mounting groove 263, and the fixing surface is fixed on the axial side wall of the first mounting groove 263, so that the outer ring 52 is radially supported in the first mounting groove 263, on one hand, the outer ring 52 is conveniently accommodated in the first mounting groove 263, on the other hand, the outer ring 52 is sleeved in the fixed sleeve 26, the outer peripheral wall of the outer ring 52 is abutted against the inner peripheral wall of the first mounting groove 263, the fixed sleeve 26 is axially fixed on the cylinder 12, and then the supporting force of the supporting bearing 50 and the cylinder 12 on the electric spindle 20 is improved.

The second mounting groove 264 which is used for accommodating the first fixing disc 53 and is communicated with the first mounting groove 263 is arranged in the fixing sleeve 26, the second mounting groove 264 is annular, the second mounting groove 264 is farther away from the bridge plate 30 than the first mounting groove 263 and is closer to the axis of the electric spindle 20, the first fixing disc 53 is not contacted with the fixing sleeve 26, and the first fixing disc 53 of the inner ring 52 can be better accommodated by arranging the second mounting groove 264, so that the support bearing 50 is better accommodated in the fixing sleeve 26, the integration level of components is improved, and the space utilization rate of the inside of the fixing sleeve 26 is increased.

The end face of the retaining sleeve 26 adjacent the bridge plate 30 is radially aligned with the end face of the outer race 52 adjacent the bridge plate 30. In this way, the outer ring 52 is accommodated in the fixed sleeve 26, and the second fixing disc 54 positioned on one side of the outer ring 52 close to the bridge plate 30 is positioned on the outer side of the fixed sleeve 26 along the axial direction, so that the depth of the first mounting groove 263 along the axial direction of the electric spindle 20 can be reduced, the processing procedure of the fixed sleeve 26 is saved, and the production of the fixed sleeve 26 is accelerated.

The bridge plate 30 is connected with the output shaft 21 through the mounting plate 25, one end of the output shaft 21, which is close to the bridge plate 30, is provided with a spacer 27 spaced from the mounting plate 25, the inner ring 51 is fixedly sleeved with the output shaft 21, one side of the inner ring 51 along the axial direction of the electric spindle 20 is abutted against the spacer 27, the other side of the inner ring 51 along the axial direction of the electric spindle 20 is abutted against the mounting plate 25, for example, the spacer 27 is provided with a threaded hole along the axial direction of the electric spindle 20, the inner ring 51 is provided with a through hole along the axial direction of the electric spindle 20, the mounting plate 25 is provided with a through hole along the axial direction of the electric spindle 20, a fastener passes through the through hole of the mounting plate and the through hole of the inner ring 51 and is in threaded connection with the threaded hole of the spacer 27, and therefore the fixed connection of the support bearing 50, the spacer 27 and the mounting plate 25 is achieved, the freedom of the support bearing 50 along the axial direction is limited by the mounting plate 25 and the spacer 27, and the stability of the connection of the support bearing 50 and the output shaft 21 is improved.

Referring to fig. 4, a mounting ring 262 is disposed on the outer periphery of the fixing sleeve 26, the mounting ring 262 is axially stacked with the cylinder 12, and the mounting ring 262 is fixedly connected with the cylinder 12. In the present embodiment, the stationary housing 26 includes a housing 261 and a mounting ring 262 provided at an outer periphery of the housing 261, and the outer race 52 is fixed inside the housing 261, for example, the outer race 52 is fixed to an inner wall of the housing 261. The outer race 52 is received in the sleeve 261 in the axial direction of the electric spindle 20 by fastening bolts. The collar 262 is fixed in barrel 12, and the periphery of barrel 12 is equipped with the screw hole, is equipped with the through-hole on the collar 262, and the collar 262 is overlapped on the barrel 12 along the axial of electricity main shaft 20 through fastening bolt to be convenient for with support bearing 50 and barrel 12 fixed connection, improve the stability that fixed cover 26 and barrel 12 are connected, in this embodiment, support bearing 50 is the revolving stage bearing.

In some other embodiments, the number of the support bearings 50 is two, and two ends of the electric spindle 20 along the axial direction are respectively installed in the motor base 10 through the two support bearings 50, so that the load between the bridge plate 30 and the output shaft 21 along the radial direction of the electric spindle 20 can be better improved.

In order to facilitate the support bearing 50 to adapt to the output shafts 21 with different sizes, the motorized spindle 20 further comprises an adjusting sleeve 24, the adjusting sleeve 24 is detachably sleeved on the outer wall of the output shaft 21, and when the inner diameter of the support bearing 50 is larger than the diameter of the output shaft 21, the inner ring 51 of the support bearing 50 is sleeved on the periphery of the output shaft 21 through the adjusting sleeve 24, so that the support bearing 50 with one size can be applied to the output shafts 21 with various sizes, and the application flexibility of the support bearing 50 is improved.

In the turntable mechanism 100, the electric spindle 20 is mounted in the motor base 10 through the support bearing 50, the support bearing 50 comprises the inner ring 51, the outer ring 52, the first rolling elements arranged along the radial direction of the electric spindle, and the second rolling elements arranged along the axial direction of the electric spindle, so that the support bearing 50 can support the electric spindle 20 along the axial direction and the radial direction of the electric spindle 20.

The utility model also discloses a numerical control machine tool, which comprises the turntable mechanism 100.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, if such modifications and variations of the present utility model fall within the scope of the claims and the equivalents thereof, the present utility model is also intended to include such modifications and variations.

The above list of preferred embodiments of the present utility model is, of course, not intended to limit the scope of the utility model, and equivalent variations according to the claims of the present utility model are therefore included in the scope of the present utility model.

Claims

1. The turntable mechanism is characterized by comprising a motor base (10), an electric spindle (20), a bridge plate (30) and a support bearing (50),

the bridge plate (30) is rotatably connected to one side of the motor base (10),

the support bearing (50) comprises an inner ring (51), an outer ring (52), a plurality of first rolling elements arranged between the inner ring (51) and the outer ring (52) along the radial direction of the electric spindle (20) and a plurality of second rolling elements arranged between the inner ring (51) and the outer ring (52) along the axial direction of the electric spindle (20), the diameter of a reference circle where the plurality of first rolling elements are positioned is unequal to the diameter of a reference circle where the plurality of second rolling elements are positioned,

an output shaft (21) of the electric main shaft (20) is installed in the motor base (10) through a support bearing (50), an inner ring (51) of the support bearing (50) is connected with the output shaft (21), an outer ring (52) of the support bearing (50) is positioned in the motor base (10), and the output shaft (21) of the electric main shaft (20) is connected with the bridge plate (30).

2. Turntable mechanism according to claim 1, characterized in that the outer ring (52) is fixed in the motor base (10) by means of a fixing sleeve (26), the outer ring (52) being provided with a fixing surface fixedly connected with the fixing sleeve (26) in the axial direction of the electric spindle (20).

3. Turntable mechanism according to claim 2, characterized in that the fixing sleeve (26) is provided with a first mounting groove (263) for accommodating the outer ring (52), the peripheral wall of the outer ring (52) is in contact with the top wall of the first mounting groove (263) in the radial direction, and the fixing surface is fixed to the side wall of the first mounting groove (263) in the axial direction.

4. Turntable mechanism according to claim 2, characterized in that the end face of the stationary sleeve (26) adjacent the bridge plate (30) is radially aligned with the end face of the outer ring (52) adjacent the bridge plate (30).

5. Turntable mechanism according to any of claims 1-4, characterized in that the inner ring (51) has a body axially aligned with the outer ring (52), a first fixed disk (53) axially protruding towards one side of the body and a second fixed disk (54) axially protruding towards the other side of the body,

a second mounting groove (264) which accommodates the first fixing disc (53) and is communicated with the first mounting groove (263) is arranged in the fixing sleeve (26), and the second mounting groove (264) is farther from the bridge plate (30) than the first mounting groove (263) and is closer to the axis of the motorized spindle (20).

6. Turntable mechanism according to any of claims 1-4, characterized in that the bridge plate (30) is connected with the output shaft (21) through a mounting disc (25), a spacer (27) spaced from the mounting disc (25) is arranged at one end of the output shaft (21) close to the bridge plate (30), the output shaft (21) is fixedly sleeved with the inner ring (51), one side of the inner ring (51) along the axial direction of the electric spindle (20) is abutted against the spacer (27), and the other side of the inner ring (51) along the axial direction of the electric spindle (20) is abutted against the mounting disc (25).

7. Turntable mechanism according to any of claims 1-4, characterized in that the motor mount (10) comprises a cylinder (12), the outer circumference of the stationary sleeve (26) is provided with a mounting ring (262), the mounting ring (262) is axially stacked with the cylinder (12) and the mounting ring (262) is fixedly connected with the cylinder (12).

8. Turntable mechanism according to any of claims 1-4, characterized in that the inner ring (51) of the support bearing (50) is sleeved on the outer circumference of the output shaft (21) through an adjustment sleeve (24), the adjustment sleeve (24) being detachably sleeved on the outer wall of the output shaft (21).

9. Turntable mechanism according to any of claims 1-4, characterized in that the number of support bearings (50) is two, and that the two ends of the electric spindle (20) in the axial direction are mounted in the motor cabinet (10) by means of two support bearings (50), respectively.

10. A numerically controlled machine tool comprising a turret mechanism according to any one of claims 1-9.