CN214559340U - Clearance-eliminating pre-tightening device of numerical control machine tool - Google Patents
Clearance-eliminating pre-tightening device of numerical control machine tool Download PDFInfo
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- CN214559340U CN214559340U CN202120522735.6U CN202120522735U CN214559340U CN 214559340 U CN214559340 U CN 214559340U CN 202120522735 U CN202120522735 U CN 202120522735U CN 214559340 U CN214559340 U CN 214559340U
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Abstract
The utility model relates to a clearance-eliminating pre-tightening device of a numerical control machine tool, belonging to the technical field of numerical control machine tools, relating to the field of clearance-eliminating pre-tightening devices of a rotating shaft and a rack and pinion transmission shaft of the numerical control machine tool, in particular to a clearance-eliminating pre-tightening device of a numerical control machine tool, comprising a reduction gearbox fixedly connected with a rotating workbench of the machine tool, wherein a first worm and a second worm are arranged in the reduction gearbox; the first worm is connected with a first worm wheel in a meshed mode, the first worm wheel is connected with the reduction gearbox in a rotating mode through a first gear shaft, a first pinion is fixedly connected to the first worm wheel, the first pinion is sleeved on the first gear shaft, and the rotating axes of the first worm wheel and the first pinion and the central axis of the first gear shaft are located on the same straight line; the utility model provides a digit control machine tool rotation axis positive reverse pivoted crack and pretension difficult problem disappear to it has driven high rigidity, high accuracy, high stationarity. Simple structure, convenient adjustment and low manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of the digit control machine tool, a clearance preloading device field that disappears of digit control machine tool rotation axis and rack and pinion transmission shaft is related to, concretely relates to digit control machine tool clearance preloading device that disappears.
Background
The numerical control machining center is a high-efficiency automatic machine tool which consists of mechanical equipment and a numerical control system and is suitable for machining complex parts. The numerical control machining center is one of numerical control machines with highest yield and most extensive application in the world at present. The comprehensive processing capacity is strong, a workpiece can finish more processing contents after being clamped once, the processing precision is high, batch workpieces with medium processing difficulty are processed, the efficiency is 5-10 times that of common equipment, especially, the batch processing method can finish processing which cannot be finished by a plurality of common equipment, and the batch processing method is more suitable for single-piece processing or medium-small batch multi-variety production with complex shapes and high precision requirements.
At present, most of mechanical transmission of a numerical control turntable of a numerical control machine tool adopts a 1-level worm gear and a variable-lead worm for adjusting a clearance, and because the clearance exists on the tooth side, the clearance can only be reduced, and the clearance cannot be eliminated and pre-tightened.
The double-output anti-backlash gear box is adopted, but the manufacturing difficulty is high, the price is high, and the adjustment is not changed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a can realize the zero clearance transmission of the complete driving chain of servo motor to final executive component workstation to can apply required pretightning force to complete driving chain, improve the transmission rigidity of rotation axis, transmission error, and a digit control machine tool backlash preloading device of reverse error.
The utility model relates to a clearance-eliminating pre-tightening device of a numerical control machine tool, which comprises a reduction gearbox fixedly connected with a rotary worktable of the machine tool, wherein a first worm and a second worm are arranged in the reduction gearbox;
the first worm is connected with a first worm wheel in a meshed mode, the first worm wheel is connected with the reduction gearbox in a rotating mode through a first gear shaft, a first pinion is fixedly connected to the first worm wheel, the first pinion is sleeved on the first gear shaft, and the rotating axes of the first worm wheel and the first pinion and the central axis of the first gear shaft are located on the same straight line;
the second worm is connected with a second worm wheel which is rotationally connected with the reduction gearbox through a second gear shaft, the second worm wheel is fixedly connected with a second pinion, the second pinion is sleeved on the second gear shaft, and the rotation axes of the second worm wheel and the second pinion and the central axis of the second gear shaft are positioned on the same straight line;
the first gear shaft and the second gear shaft are arranged in parallel, the lead and the modulus of the first worm and the second worm are equal, the rotation directions are the same, the tooth number and the modulus of the first pinion and the second pinion are the same, and the tooth number and the modulus of the first worm wheel and the second worm wheel are the same;
the first pinion and the second pinion are both meshed with a workbench large gear ring for driving the rotary workbench of the machine tool to rotate;
the first worm and the second worm are connected through a connecting device, and the connecting device drives the first worm and the second worm to synchronously rotate.
Preferably, the central axes of the first worm and the second worm are located on the same straight line.
Preferably, the connecting means is a coupling.
Preferably, the reduction gearbox is fixedly arranged on a base of a workbench of the machine tool.
The utility model has simple structure and convenient use, the servo motor drives the first worm and the second worm which are connected in series, the two worms rotate simultaneously to drive the two worm wheels to rotate, the two worm wheels drive the two pinions which are coaxially fixed to rotate in the same direction to drive the big gear which is fixed on the workbench to rotate the workbench; when gap adjustment and pre-tightening are carried out, a connecting device for connecting a first worm and a second worm is loosened, the first worm is rotated, a first worm wheel drives a first small gear to rotate, the first small gear drives a large gear ring of a workbench to rotate, the large gear ring pushes a second small gear to rotate, the second small gear drives a second worm wheel to rotate, the tooth side surface of the second worm wheel abuts against the tooth side surface of the second worm, and the second worm cannot rotate due to the self-locking property of the worm and gear, so that the complete gap elimination of the whole transmission chain is realized; under the condition of complete backlash elimination, a certain torque is applied to the first worm, so that a transmission contact point on the whole transmission chain generates pre-pressure, namely the pre-tightening load of the whole transmission chain is realized. At this time, the connecting device connecting the first worm and the second worm is locked, and the backlash and the pretightening force are kept.
Drawings
Fig. 1 is a schematic view of the usage state of the present invention.
Reference numerals: 1-a first worm, 2-a first worm gear, 3-a first pinion, 4-a coupler, 5-a second worm, 6-a second worm gear, 7-a second pinion, 8-a workbench big gear ring, 9-a workbench base and 10-a servo motor.
Detailed Description
The utility model relates to a clearance-eliminating pre-tightening device of a numerical control machine tool, which comprises a reduction gearbox fixedly connected with a rotary worktable of the machine tool, wherein a first worm 1 and a second worm 5 are arranged in the reduction gearbox;
the first worm 1 is connected with a first worm wheel 2 in a meshed mode, the first worm wheel 2 is connected with the reduction gearbox in a rotating mode through a first gear shaft, a first pinion 3 is fixedly connected to the first worm wheel 2, the first pinion 3 is sleeved on the first gear shaft, and the rotating axes of the first worm wheel 2 and the first pinion 3 and the central axis of the first gear shaft are located on the same straight line;
the second worm 5 is connected with a second worm wheel 6, the second worm wheel 6 is rotationally connected with the reduction gearbox through a second gear shaft, the second worm wheel 6 is fixedly connected with a second pinion 7, the second pinion 7 is sleeved on the second gear shaft, and the rotation axes of the second worm wheel 6 and the second pinion 7 and the central axis of the second gear shaft are positioned on the same straight line;
the first gear shaft and the second gear shaft are arranged in parallel, the modulus and the lead of the first worm 1 and the lead of the second worm 5 are equal, the rotation directions are the same, the tooth number and the modulus of the first pinion 3 and the second pinion 7 are the same, and the tooth number and the modulus of the first worm wheel 2 and the second worm wheel 6 are the same;
the first pinion 3 and the second pinion 7 are both meshed with a workbench large gear ring 8 for driving a rotary workbench of a machine tool to rotate;
the first worm 1 and the second worm 5 are connected through a connecting device, and the connecting device drives the first worm 1 and the second worm 5 to synchronously rotate.
The central axes of the first worm 1 and the second worm 5 are located on the same straight line.
The connecting device is a coupling 4.
The reduction gearbox is fixedly arranged on a workbench base 9 of the machine tool.
When the automatic backlash eliminating device is used, the first worm 1 is connected with a servo motor 10 on a machine tool, the servo motor 10 is used as a power source, a connecting device for connecting the first worm 1 and the second worm 5 is loosened, the first worm 1 is rotated, the first worm wheel drives the first small gear 3 to rotate, the first small gear 3 drives the large gear ring 8 of the workbench to rotate, the large gear ring pushes the second small gear 7 to rotate, the second small gear 7 drives the second worm wheel 6 to rotate, the tooth side surface of the second worm wheel 6 abuts against the tooth side surface of the second worm 5, and the second worm 5 cannot rotate due to the self-locking property of the worm wheel and worm, so that the complete backlash eliminating of the whole transmission chain is realized; under the condition of complete backlash elimination, a certain torque is applied to the first worm 1 again, so that a transmission contact point on the whole transmission chain generates pre-pressure, namely the pre-tightening load of the whole transmission chain is realized. At this time, the connecting device connecting the first worm 1 and the second worm 5 is locked, and the backlash and the pretightening force are kept.
The utility model provides a digit control machine tool rotation axis positive reverse pivoted crack and pretension difficult problem disappear to it has driven high rigidity, high accuracy, high stationarity. Simple structure, convenient adjustment and low manufacturing cost.
Claims (4)
1. A clearance-eliminating pre-tightening device of a numerical control machine tool comprises a reduction gearbox fixedly connected with a rotary worktable of the machine tool, and is characterized in that a first worm (1) and a second worm (5) are arranged in the reduction gearbox;
the first worm (1) is connected with a first worm wheel (2) in a meshed mode, the first worm wheel (2) is connected with the reduction gearbox in a rotating mode through a first gear shaft, a first pinion (3) is fixedly connected to the first worm wheel (2), the first pinion (3) is sleeved on the first gear shaft, and the rotating axes of the first worm wheel (2) and the first pinion (3) and the central axis of the first gear shaft are located on the same straight line;
the second worm (5) is connected with a second worm wheel (6), the second worm wheel (6) is rotationally connected with the reduction gearbox through a second gear shaft, a second pinion (7) is fixedly connected to the second worm wheel (6), the second pinion (7) is sleeved on a second gear shaft, and the rotating axes of the second worm wheel (6) and the second pinion (7) and the central axis of the second gear shaft are positioned on the same straight line;
the first gear shaft and the second gear shaft are arranged in parallel, the lead and the modulus of the first worm (1) and the second worm (5) are equal, the turning directions are the same, the tooth number and the modulus of the first pinion (3) and the second pinion (7) are the same, and the tooth number and the modulus of the first worm wheel (2) and the second worm wheel (6) are the same;
the first small gear (3) and the second small gear (7) are both meshed with a workbench big gear ring (8) for driving a rotary workbench of a machine tool to rotate;
the first worm (1) and the second worm (5) are connected through a connecting device, and the connecting device drives the first worm (1) and the second worm (5) to synchronously rotate.
2. The backlash-eliminating and pre-tightening device for the numerical control machine tool as claimed in claim 1, wherein the central axes of the first worm (1) and the second worm (5) are located on the same straight line.
3. A backlash-eliminating pretensioning device for a numerically controlled machine tool according to claim 2, characterized in that the connecting means is a coupling (4).
4. The backlash-eliminating and pre-tightening device for the numerical control machine tool as claimed in claim 3, wherein the reduction gearbox is fixedly arranged on a base (9) of a workbench of the machine tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120522735.6U CN214559340U (en) | 2021-03-12 | 2021-03-12 | Clearance-eliminating pre-tightening device of numerical control machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120522735.6U CN214559340U (en) | 2021-03-12 | 2021-03-12 | Clearance-eliminating pre-tightening device of numerical control machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214559340U true CN214559340U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120522735.6U Active CN214559340U (en) | 2021-03-12 | 2021-03-12 | Clearance-eliminating pre-tightening device of numerical control machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214559340U (en) |
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2021
- 2021-03-12 CN CN202120522735.6U patent/CN214559340U/en active Active
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