CN211117243U

CN211117243U - Numerical control turntable

Info

Publication number: CN211117243U
Application number: CN201922417683.1U
Authority: CN
Inventors: 虞俊豪; 虞荣华; 陈宝华
Original assignee: Taizhou Beiping Machine Tool Co ltd
Current assignee: Beiping machine tool (Zhejiang) Co.,Ltd.
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-07-28
Anticipated expiration: 2029-12-27

Abstract

The utility model provides a numerical control revolving stage belongs to mechanical technical field. The problem that the braking effect of an existing numerical control rotary table is not ideal is solved. This numerical control revolving stage, including the box, wear to be equipped with the pivot and drive pivot pivoted actuating mechanism in the box, the one end of pivot is equipped with the workstation, and the workstation is located the one end of box, and the other end on the box has linked firmly the back positioning seat, and the back positioning seat is gone up and is located the static friction disc, has linked firmly the dynamic friction disc in the pivot, is equipped with the piston that can axial displacement on the back positioning seat, and the piston can push away the dynamic friction disc and lean on the dynamic friction disc. The numerical control turntable has the advantages of good braking effect and long service life.

Description

Numerical control turntable

Technical Field

The utility model belongs to the technical field of machinery, a revolving stage, especially a numerical control revolving stage are related to.

Background

The numerical control rotary table has wide application field, is often used in production workshops and other environments, can be used for transferring workpieces, can be used for performing multi-station operation and the like. The numerical control operation turntable forms a social supporting system, which is a necessary result of economic development of the market and is a necessary way to improve the product level, shorten the delivery time, reduce the cost and make a large scale. The machining center and the numerical control machine tool need to carry out continuous rotary machining and unequal rotary machining when the workpiece is subjected to complex curved surface machining, the workpiece clamped on the numerical control rotary table can be quickly positioned to an accurate angle, accurate braking is needed to be carried out on the numerical control rotary table, a transmission mechanism is adopted in the prior art, the structure of the transmission mechanism is complex and is easy to deform, and the machining precision of the workpiece is seriously influenced because the vibration of a cutter and the workpiece is caused due to insufficient rigidity of transmission.

For example, a brake mechanism (application number: 201210100047.6) of a numerical control turntable disclosed in the chinese patent document includes a brake cylinder and a driving shaft, one end of the driving shaft is installed in the brake cylinder, one end of the driving shaft is installed with a brake pad through a shaft sleeve, a piston is installed in the brake cylinder, an air inlet is provided on the brake cylinder, and the brake pad and the piston are installed oppositely. However, the numerical control turntable braking mechanism realizes the braking positioning of the turntable by extruding the brake pad through the piston, so the braking effect is not ideal, and the braking failure is easy to generate after long-time use.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a better and longer numerical control revolving stage of life of brake effect.

The purpose of the utility model can be realized by the following technical proposal: numerical control revolving stage, the power distribution box comprises a box body, the box in wear to be equipped with the pivot and drive pivot pivoted actuating mechanism, the one end of pivot be equipped with the workstation, the workstation be located the one end of box, its characterized in that, the box on the other end link firmly the back positioning seat, the back positioning seat on the location have the static friction piece, the pivot on link firmly the dynamic friction piece, the back positioning seat on be equipped with the piston that can axial displacement, the piston can promote the static friction piece support and lean on the dynamic friction piece.

When the brake device works, the driving mechanism drives the rotating shaft to rotate so as to drive the workbench connected to the rotating shaft to rotate, when the rotating shaft needs to be braked and positioned, the driving mechanism stops working, and then the moving and static friction plates are pushed to move through the movement of the piston so as to tightly press the static friction plates on the moving friction plates, so that the positioning brake on the rotating shaft is realized, and the brake device has the advantages of good brake effect and long service life. The rotating shaft and the workbench are of an integrated structure, and as the other mode, the rotating shaft can be fixedly connected with the workbench through screws.

In foretell numerical control revolving stage, back positioning seat be annular just back positioning seat have the notch towards the constant head tank of outer end, the constant head tank in set up cylinder body and piston, cylinder body and piston all be annular just back positioning seat, cylinder body and the coaxial setting of piston. By adopting the arrangement, the numerical control turntable has the advantages of compact structure and convenience in assembly, and has the advantages of larger braking force and more stable braking of the turntable.

In the numerical control turntable, the middle part of the inner end of the cylinder body is provided with a convex annular convex shoulder, the annular convex shoulder and the rear positioning seat are coaxially arranged, and a cavity for the piston to reciprocate is formed between the annular convex shoulder and the inner side wall of the rear positioning seat. By adopting the arrangement, the cylinder body is convenient to process and high in processing precision, the braking force is improved, and meanwhile, the brake cylinder has the advantage of convenience in assembly.

In the numerical control turntable, the rear positioning seat is provided with two pistons capable of moving axially, the two pistons are respectively positioned on two sides of the rotating shaft, and the two pistons can push the static friction plate to abut against the dynamic friction plate. When the rotating shaft needs to be braked and positioned, one piston pushes the dynamic and static friction plates to be abutted against the dynamic friction plates, and the other piston pushes the dynamic and static friction plates to be abutted against the dynamic friction plates to realize braking again.

In the numerical control turntable, the pistons are symmetrically arranged on two sides of the rotating shaft, and the outer dead points of the two pistons are different. The outer dead points of the two pistons are different, secondary braking can be better achieved, and the braking effect is improved.

In the numerical control turntable, the driving mechanism comprises a worm axially arranged on the box body and a motor driving the worm to rotate, the rotating shaft is sleeved and fixedly connected with a worm wheel, and the worm is meshed with the worm wheel. The motor drives the rotating shaft to rotate through the worm gear and the worm, and the self-locking mechanism has one-way transmission and a better self-locking effect.

In the numerical control turntable, the static friction plate is annular, and a plurality of through holes are formed in the side part of the static friction plate. The static friction plate is provided with a through hole,

in the numerical control turntable, the number of the dynamic friction plates and the number of the static friction plates are two, the dynamic friction plates and the static friction plates are sequentially arranged at intervals, and the inner sides of the static friction plates can abut against the dynamic friction plates. The static friction plate and the dynamic friction plate which are arranged at intervals are abutted and pressed, so that the brake device has the advantage of good brake effect.

In the numerical control turntable, an annular partition plate is arranged between the static friction plates, the partition plate is fixedly connected to the rear positioning seat and is positioned between the outer sides of the two static friction plates, and the thickness of the partition plate is larger than that of the movable plate. By adopting the arrangement, the brake effect is improved.

In foretell numerical control revolving stage, the one end outside of box link firmly the position sleeve, the workstation be located the outer end of position sleeve, the pivot on the cover be equipped with go-between one, go-between one and the coaxial setting of pivot link firmly mutually with the pivot through the screw, the outside cover of go-between one be equipped with go-between two, go-between two with go-between coaxial setting just go-between one with the box link firmly mutually, go-between one with go-between two between be equipped with the bearing. The outer side of one end of the box body is fixedly connected with the positioning sleeve, and the first connecting ring and the second connecting ring are located on the inner side of the positioning sleeve, so that the processing technology is simplified, the contact reliability of the bearing is ensured, and the stability and the rigidity are improved.

Compared with the prior art, the numerical control turntable has the following advantages:

1. the driving mechanism stops working, and then the moving and static friction plates are pushed to move through the movement of the piston so that the static friction plates are tightly pressed on the moving friction plates, so that the positioning brake on the rotating shaft is realized, and the advantages of better brake effect and longer service life are achieved;

2. the middle part of the inner end of the cylinder body is provided with a convex annular convex shoulder, the annular convex shoulder and the rear positioning seat are coaxially arranged, and a cavity for the piston to reciprocate is formed between the annular convex shoulder and the inner side wall of the rear positioning seat, so that the cylinder body is convenient to process and high in processing precision, the braking force is improved, and meanwhile, the cylinder body has the advantage of convenience in assembly;

3. the static friction plates and the dynamic friction plates which are arranged at intervals are abutted against each other, so that the brake device has the advantage of good brake effect;

4. the outer side of one end of the box body is fixedly connected with the positioning sleeve, and the first connecting ring and the second connecting ring are located on the inner side of the positioning sleeve, so that the processing technology is simplified, the contact reliability of the bearing is ensured, and the stability and the rigidity are improved.

Drawings

Fig. 1 is a schematic top view of the numerical control turret.

Fig. 2 is a schematic sectional view a-a of fig. 1.

Fig. 3 is a schematic sectional view B-B of fig. 2.

Fig. 4 is a partially enlarged schematic view of C of fig. 2.

Fig. 5 is a schematic view of another mode of the numerical control turntable.

In the figure, 1, a box body; 2. a rotating shaft; 3. a drive mechanism; 3a, a worm; 3b, a worm wheel; 3c, a motor; 4. a work table; 5. a rear positioning seat; 5a, a positioning groove; 6. a static friction plate; 6a, a through hole; 7. a dynamic friction plate; 8. a piston; 9. a cylinder body; 9a, an annular shoulder; 10. a partition plate; 11. a positioning sleeve; 12. a connecting ring I; 13. a connecting ring II; 14. and a bearing.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 4, the numerical control turntable comprises a box body 1, a rotating shaft 2 and a driving mechanism 3 for driving the rotating shaft 2 to rotate are arranged in the box body 1 in a penetrating mode, the driving mechanism 3 comprises a worm 3a axially arranged on the box body 1 and a motor 3c for driving the worm 3a to rotate, the rotating shaft 2 is sleeved with and fixedly connected with a worm wheel 3b, and the worm 3a is meshed with the worm wheel 3b, so that the numerical control turntable has one-way transmission and a better self-locking effect. As another mode, the driving mechanism 3 is a rotary oil cylinder, and a piston 8 rod of the rotary oil cylinder is fixedly connected with the rotating shaft 2.

The one end of pivot 2 is equipped with workstation 4, workstation 4 is located the one end of box 1, the other end on the box 1 has linked firmly back positioning seat 5, it has static friction piece 6 to fix a position on the back positioning seat 5, it has dynamic friction piece 7 to link firmly on pivot 2, back positioning seat 5 is annular and back positioning seat 5 has the notch towards the constant head tank 5a of outside end, cylinder body 9 and the piston 8 that set up in the constant head tank 5a, cylinder body 9 and piston 8 all are annular and back positioning seat 5, the coaxial setting of cylinder body 9 and piston 8, piston 8 can push dynamic friction piece 6 and support and lean on dynamic friction piece 7, make this numerical control revolving stage compact structure and convenient assembling's advantage, great brake power has simultaneously, comparatively steady advantage to the revolving stage brake.

The middle part of the inner end of the cylinder body 9 is provided with a convex annular shoulder 9a, the annular shoulder 9a and the rear positioning seat 5 are coaxially arranged, and a cavity for the piston 8 to reciprocate is formed between the annular shoulder 9a and the inner side wall of the rear positioning seat 5, so that the cylinder body 9 is convenient to process and high in processing precision, the braking force is improved, and meanwhile, the cylinder body has the advantage of convenience in assembly.

The static friction plate 6 is annular, and the lateral part of static friction plate 6 is equipped with a plurality of through-holes 6a that run through, and the cross-section of through-hole 6a includes two circular portions and arc portion, and arc portion and the coaxial setting of static friction plate 6, the both ends and the circular portion of arc portion communicate, have improved the brake effect, have better radiating effect simultaneously, and as preferred, through-hole 6a adopts round hole or elliptical aperture. The number of the dynamic friction plates 7 and the number of the static friction plates 6 are two, the dynamic friction plates 7 and the static friction plates 6 are arranged at intervals in sequence, and the inner sides of the static friction plates 6 can abut against the dynamic friction plates 7. An annular partition plate 10 is arranged between the static friction plates 6, the partition plate 10 is fixedly connected to the rear positioning seat 5, the partition plate 10 is located between the outer sides of the two static friction plates 6, and the thickness of the partition plate 10 is larger than that of the movable plate.

The outer side of one end of box 1 has linked firmly position sleeve 11, and workstation 4 is located the outer end of position sleeve 11, and the cover is equipped with go-between 12 on pivot 2, and go-between 12 links firmly with pivot 2 through the screw with pivot 2 coaxial setting, is equipped with bearing 14 between go-between 12 and the position sleeve 11, has simplified processing technology, guarantees the reliability of bearing 14 contact, has improved stability and rigidity.

As another mode, as shown in fig. 5, a positioning sleeve 11 is fixedly connected to an outer side of one end of the box body 1, the workbench 4 is located at an outer end of the positioning sleeve 11, a first connection ring 12 is sleeved on the rotating shaft 2, the first connection ring 12 is coaxially arranged with the rotating shaft 2 and fixedly connected with the rotating shaft 2 through a screw, a second connection ring 13 is sleeved on an outer side of the first connection ring 12, the second connection ring 13 is coaxially arranged with the first connection ring 12, the first connection ring 12 is fixedly connected with the box body 1, a bearing 14 is arranged between the first connection ring 12 and the second connection ring 13, and the first connection ring 12 and the second connection ring 13 are located on an inner side of the positioning sleeve 11.

When the brake device works, the motor 3c drives the rotating shaft 2 to rotate through the worm 3a of the worm wheel 3b so as to drive the workbench 4 to rotate, when the rotating shaft 2 needs to be braked and positioned, the motor 3c stops working, then the moving and static friction plates 6 are pushed to move through the movement of the piston 8 so that the static friction plates 6 are tightly pressed on the moving friction plates 7, the positioning brake on the rotating shaft 2 is realized, and the brake device has the advantages of good brake effect and long service life. The static friction plates 6 and the dynamic friction plates 7 which are arranged at intervals are abutted against each other, so that the brake device has the advantage of good brake effect. The rotating shaft 2 and the workbench 4 are of an integral structure, and as another mode, the rotating shaft 2 can be fixedly connected with the workbench 4 through screws.

As another mode, as shown in fig. 5, two pistons 8 capable of moving axially are arranged on the rear positioning seat 5, the two pistons 8 are respectively symmetrically arranged on two sides of the rotating shaft 2, the two pistons 8 can both push the static friction plate 6 to abut against the dynamic friction plate 7, and outer dead points of the two pistons 8 are different. When the rotating shaft 2 needs to be braked and positioned, one piston 8 pushes the static friction plate 6 to abut against the dynamic friction plate 7, meanwhile, the other piston 8 pushes the static friction plate 6 to abut against the dynamic friction plate 7 to realize braking again, the partition plate 10 is located between the outer sides of the two static friction plates 6, the thickness of the partition plate 10 is larger than that of the dynamic plate, the outer dead points of the two pistons 8 are different, and particularly when the other piston 8 realizes secondary braking, the braking pressure is high, and the braking effect is improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the box 1, the rotating shaft 2, the driving mechanism 3, the worm 3a, the worm wheel 3b, the motor 3c, the working table 4, the rear positioning seat 5, the positioning groove 5a, the static friction plate 6, the through hole 6a, the dynamic friction plate 7, the piston 8, the cylinder 9, the annular shoulder 9a, the partition plate 10, the positioning sleeve 11, the first connecting ring 12, the second connecting ring 13, the bearing 14 and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. Numerical control revolving stage, including box (1), box (1) in wear to be equipped with pivot (2) and drive pivot (2) pivoted actuating mechanism (3), the one end of pivot (2) be equipped with workstation (4), workstation (4) be located the one end of box (1), its characterized in that, box (1) on the other end link firmly back positioning seat (5), back positioning seat (5) on the location have static friction piece (6), pivot (2) on link firmly dynamic friction piece (7), back positioning seat (5) on be equipped with piston (8) that can axial displacement, piston (8) can promote static friction piece (6) support and lean on dynamic friction piece (7).

2. The numerical control rotary table according to claim 1, wherein the rear positioning seat (5) is annular and the rear positioning seat (5) has a positioning groove (5a) with a notch facing to the outer end, a cylinder (9) and a piston (8) are arranged in the positioning groove (5a), the cylinder (9) and the piston (8) are annular and the rear positioning seat (5), the cylinder (9) and the piston (8) are coaxially arranged.

3. The numerical control rotary table according to claim 2, wherein a raised annular shoulder is arranged in the middle of the inner end of the cylinder body (9), the annular shoulder and the rear positioning seat (5) are coaxially arranged, and a cavity for the piston (8) to reciprocate is formed between the annular shoulder and the inner side wall of the rear positioning seat (5).

4. The numerical control turntable according to claim 1, wherein two axially movable pistons (8) are arranged on the rear positioning seat (5), the two pistons (8) are respectively located at two sides of the rotating shaft (2), and both pistons (8) can push the static friction plate (6) to abut against the dynamic friction plate (7).

5. Numerical control turntable according to claim 4, characterized in that said pistons (8) are symmetrically arranged on both sides of said rotating shaft (2) and the outer dead centers of said two pistons (8) are different.

6. The numerical control turntable according to claim 1, 2, 3, 4 or 5, wherein the driving mechanism (3) comprises a worm (3a) axially arranged on the box body (1) and a motor (3c) driving the worm (3a) to rotate, the rotating shaft (2) is sleeved and fixedly connected with a worm wheel (3b), and the worm (3a) is meshed with the worm wheel (3 b).

7. The numerical control rotary table according to claim 1, 2, 3, 4 or 5, wherein the static friction plate (6) is annular, and a plurality of through holes (6a) are formed in the side part of the static friction plate (6).

8. The numerical control rotary table according to claim 1, 2, 3, 4 or 5, wherein the number of the dynamic friction plates (7) and the number of the static friction plates (6) are two, the dynamic friction plates (7) and the static friction plates (6) are sequentially arranged at intervals, and the inner sides of the static friction plates (6) can abut against the dynamic friction plates (7).

9. The numerical control rotary table according to claim 1, 2, 3, 4 or 5, wherein an annular partition plate (10) is arranged between the static friction plates (6), the partition plate (10) is fixedly connected to the rear positioning seat (5), the partition plate (10) is positioned between the outer sides of the two static friction plates (6), and the thickness of the partition plate (10) is greater than that of the movable plate.

10. The numerical control rotary table according to claim 1, 2, 3, 4 or 5, wherein a positioning sleeve (11) is fixedly connected to the outer side of one end of the case body (1), the workbench (4) is located at the outer end of the positioning sleeve (11), a first connecting ring (12) is sleeved on the rotating shaft (2), the first connecting ring (12) and the rotating shaft (2) are coaxially arranged and fixedly connected with the rotating shaft (2) through screws, a second connecting ring (13) is sleeved on the outer side of the first connecting ring (12), the second connecting ring (13) and the first connecting ring (12) are coaxially arranged and the first connecting ring (12) and the case body (1) are fixedly connected, and a bearing (14) is arranged between the first connecting ring (12) and the second connecting ring (13).