CN217317105U - High-speed nut rotary feed screw device - Google Patents
High-speed nut rotary feed screw device Download PDFInfo
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- CN217317105U CN217317105U CN202220926219.4U CN202220926219U CN217317105U CN 217317105 U CN217317105 U CN 217317105U CN 202220926219 U CN202220926219 U CN 202220926219U CN 217317105 U CN217317105 U CN 217317105U
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Abstract
The utility model discloses a high-speed nut rotary feed screw device, which comprises a screw, a screw nut, a bearing unit and a driving unit; the screw rod is fixed on the machine tool through a screw rod seat; the bearing unit comprises a bearing inner fixing sleeve, a bearing outer fixing sleeve and a bearing assembly arranged between the bearing inner fixing sleeve and the bearing outer fixing sleeve, one end of the bearing inner fixing sleeve is fixedly connected with one end of the screw nut, and the other end of the bearing inner fixing sleeve is fixedly connected with the driving unit; the screw nut sets up at the lead screw, and drive unit includes first band pulley, second band pulley, hold-in range and driving motor, and first band pulley is connected with driving motor, and the second band pulley cover is on the lead screw and with bearing internal fixation muffjoint, is connected through the hold-in range between first band pulley and the second band pulley. The utility model discloses a rotatory feed screw device of high-speed nut has simple structure, and is small, advantages such as the heat dissipation of being convenient for and functioning speed height.
Description
Technical Field
The utility model belongs to the technical field of the digit control machine tool feed drive technique and specifically relates to a rotatory feed screw device of high-speed nut.
Background
In the field of numerical control machine tools, a screw driving device is a frequently-adopted design structure, particularly, a sliding table of a machine tool or a feeding motion of a main shaft, however, an existing screw driving device generally adopts a driving motor to be connected with a screw, the driving motor drives the screw to rotate, a screw nut is fixedly connected with a moving part, under the rotation of the screw, the screw nut is driven to move linearly, and then the moving part is driven, and the existing screw driving device has the following defects: because the volume and the mass of the screw rod are larger, the inertia of the screw rod is also larger, and a driving motor with larger power is required when the screw rod is driven to rotate, so that the volume and the cost of the whole driving device are increased; meanwhile, the existing screw driving device needs to sleeve the bearing unit outside the screw nut, so that the radial size of the screw nut assembly is increased, and further the whole volume of the screw driving device is increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides a rotatory feed screw device of high-speed nut to above problem.
The utility model discloses a technical means as follows:
a high-speed nut rotary feed screw device comprises a screw, a screw nut, a bearing unit and a driving unit;
the lead screw is fixed on the machine tool through a lead screw seat;
the bearing unit comprises a bearing inner fixing sleeve, a bearing outer fixing sleeve and a bearing assembly, the bearing outer fixing sleeve is sleeved on the bearing inner fixing sleeve, a bearing installation space is formed between the bearing outer fixing sleeve and the bearing inner fixing sleeve, the bearing assembly is installed in the bearing installation space, one end of the bearing inner fixing sleeve is a lead screw nut connecting end fixedly connected with one end of a lead screw nut, and the other end of the bearing inner fixing sleeve is a driving unit connecting end fixedly connected with a driving unit;
the screw nut is arranged on the screw, and one end of the screw nut is fixedly connected with the screw nut connecting end of the fixed sleeve in the bearing;
the drive unit comprises a first belt wheel, a second belt wheel, a synchronous belt and a drive motor, the first belt wheel is connected with the drive motor, the second belt wheel is sleeved on the lead screw and is fixedly connected with the drive unit connecting end of the bearing inner fixing sleeve, and the first belt wheel is connected with the second belt wheel through the synchronous belt.
Further, a bearing sealing ring is arranged at one end, close to the screw nut connecting end, between the bearing inner fixing sleeve and the bearing outer fixing sleeve.
Furthermore, an oil injection channel communicated with the bearing sealing ring is further arranged on the bearing outer fixing sleeve.
Further, a torque limiter is arranged between the driving motor and the first belt pulley.
Further, the bearing assembly comprises two groups of angular contact ball bearings which are symmetrically arranged, and each group of angular contact ball bearings comprises at least one angular contact ball bearing.
Furthermore, the bearing internal fixation sleeve is of a stepped shaft sleeve structure, an external thread is arranged at one end, close to the connecting end of the driving unit, of the bearing internal fixation sleeve, and the bearing assembly is fixed on the bearing internal fixation sleeve through a locking nut.
And the pressing cover is fixedly connected with one ends, close to the connecting end of the driving unit, of the sliding table and the bearing outer fixing sleeve through screws respectively.
Furthermore, a cooling channel arranged along the axial direction of the screw rod is also arranged in the screw rod.
Compared with the prior art, the utility model discloses a rotatory feed screw device of high-speed nut has following beneficial effect: the screw device disclosed by the utility model directly drives the screw nut to rotate through the driving unit, so that the sliding table is driven to move through the screw nut; meanwhile, as the motion inertia of the whole device is small, the high-speed rotary feeding of the screw nut can be realized; furthermore, as the lead screw nut and the bearing unit are arranged along the axial direction of the lead screw, the overall outer diameter of the lead screw nut and the bearing unit is reduced, and further the volume of the lead screw device is reduced.
Drawings
Fig. 1 is a structural diagram of a high-speed nut rotating feed screw device disclosed by the utility model;
FIG. 2 is an enlarged partial view of the dashed box of FIG. 1;
in the figure: 1. the screw rod, 10, a screw rod seat, 11, a cooling channel, 2, a screw rod nut, 20, a screw rod nut connecting flange, 3, a bearing unit, 30, a bearing inner fixing sleeve, 300, a bearing inner fixing sleeve connecting flange, 31, a bearing outer fixing sleeve, 32, a bearing assembly, 33, a bearing installation space, 34, a screw rod nut connecting end, 35, a driving unit connecting end, 36, a bearing sealing ring, 37, an oil injection channel, 38, a gland, 39, a locking nut, 4, a driving unit, 40, a first belt pulley, 41, a second belt pulley, 42, a synchronous belt, 43, a driving motor, 44 and a torque limiter.
Detailed Description
As shown in fig. 1 and fig. 2, the high-speed nut rotating feed screw device disclosed by the present invention comprises a screw 1, a screw nut 2, a bearing unit 3 and a driving unit 4;
two ends of the screw rod 1 are fixed on the machine tool through a screw rod seat 10;
the bearing unit 3 comprises a bearing inner fixing sleeve 30, a bearing outer fixing sleeve 31 and a bearing assembly 32, the bearing outer fixing sleeve 31 is sleeved on the bearing inner fixing sleeve 30, a bearing installation space 33 is formed between the bearing outer fixing sleeve 31 and the bearing inner fixing sleeve 30, the bearing assembly 32 is installed in the bearing installation space 33, one end of the bearing inner fixing sleeve 30 is a lead screw nut connecting end 34 fixedly connected with one end of a lead screw nut 2, and the other end of the bearing inner fixing sleeve 30 is a driving unit connecting end 35 fixedly connected with a driving unit 4;
the screw nut 2 is arranged on the screw 1, and one end of the screw nut is fixedly connected with the screw nut connecting end 34 of the bearing inner fixing sleeve 30, preferably, the screw and the screw nut adopt a standard screw structure so as to be convenient for purchasing, and further, the design and manufacturing cost of the machine tool is reduced;
the driving unit 4 includes a first belt wheel 40, a second belt wheel 41, a synchronous belt 42 and a driving motor 43, the first belt wheel 40 is connected to the driving motor 43, the second belt wheel 41 is sleeved on the screw rod 1 and is fixedly connected to the driving unit connecting end 35 of the bearing inner fixing sleeve 30, the first belt wheel 40 is connected to the second belt wheel 41 through the synchronous belt 42, and the driving motor is a servo motor in this embodiment.
Specifically, the lead screw nut 2 is equipped with the lead screw nut connection method even 20 towards the one end of bearing unit 3, bearing internal fixation sleeve 30 is the step shaft sleeve structure, the one end that bearing internal fixation sleeve 30 is close to drive unit link 35 is equipped with the external screw thread, bearing assembly 32 fixes through lock nut 39 on the bearing internal fixation sleeve 30, through the inner circle butt of lock nut and bearing in order to injecing the bearing at bearing internal fixation sleeve promptly, bearing internal fixation sleeve 30 is equipped with bearing internal fixation sleeve flange 300 towards the one end of lead screw nut 2, through screw fixed connection between lead screw nut connection method even 20 and the bearing internal fixation sleeve flange 300, the one end that is equipped with lock nut still is equipped with gland 38, gland 38 is close to the one end fixed connection of drive unit link with slip table and bearing external fixation sleeve 31 respectively through the screw, the gland is in butt joint with the outer lane one end of bearing in order to be used for prescribing the bearing inner race in the bearing external fixation sleeve, has the through-hole in the middle of the second band pulley 41, and the second band pulley passes through the through-hole cover on the lead screw and through screw and bearing internal fixation sleeve fixed connection.
The screw device disclosed by the utility model directly drives the screw nut to rotate through the driving unit, so that the sliding table is driven to move through the screw nut; meanwhile, the motion inertia of the whole device is small, so that the high-speed rotary feeding of the lead screw nut can be realized; furthermore, as the screw nut and the bearing unit are arranged along the axial direction of the screw, the overall external diameter of the screw nut and the bearing unit is reduced, especially a bearing with smaller diameter can be adopted, the rotational inertia is further reduced, the volume of the screw device is further reduced, and simultaneously, because the screw nut and the bearing unit are arranged along the axial direction of the screw, the screw nut is completely exposed, the heat dissipation of the screw nut is convenient, the performance and the service life of the screw are improved, and furthermore, because the screw nut is connected through the bearing unit, and two ends of the screw are fixed, the screw is equivalent to three supporting points, the driving force applied by the driving unit is close to the screw nut, and the rigidity of the screw rod is further improved, so that the screw rod nut can rotate at a high speed, the safe rotating speed between the screw rod and the screw rod nut is greatly improved, and the movement performance of the machine tool is further improved.
Further, a bearing sealing ring 36 is arranged at one end, close to the lead screw nut connecting end 34, between the bearing inner fixing sleeve 30 and the bearing outer fixing sleeve 31, an oil filling channel 37 communicated with the bearing sealing ring 36 is further arranged on the bearing outer fixing sleeve 31, and due to the arrangement of the bearing sealing ring structure and the oil filling channel, sealing of a bearing assembly can be achieved, the performance of a bearing is guaranteed, the performance of the whole lead screw device is further guaranteed, and the service life of the lead screw device is prolonged.
Further, a torque limiter 44 is further arranged between the driving motor 43 and the first belt pulley 40, and due to the arrangement of the torque limiter, when overload is caused due to machine tool collision or other reasons, the torque limiter slips, so that the driving unit is protected from being damaged.
Further, the bearing assembly 32 includes two sets of angular contact ball bearings symmetrically arranged, each set of angular contact ball bearing includes at least one angular contact ball bearing, in this embodiment, each set has two angular contact ball bearings, the two sets of angular contact ball bearings are separated by a spacer, and only the angular contact ball bearing can bear the axial force generated between the lead screw and the lead screw nut and can also bear the radial force generated by the driving motor through the synchronous belt, so as to ensure the performance between the lead screw and the lead screw, improve the service life, and preferably, the angular contact ball bearing with the pressure angle of 60 degrees is adopted.
Further, still be equipped with the cooling channel 11 that sets up along the lead screw axial in the lead screw 1, specifically, the center at the lead screw has the cooling channel who runs through the lead screw both ends along axial direction processing, through to cooling channel injection coolant liquid, the arrow point is the flow direction of coolant liquid in the picture, can be further to the lead screw and lead screw nut cool down, guarantees lead screw and lead screw nut's performance and life.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (8)
1. A high-speed nut rotary feed screw device is characterized in that: comprises a screw rod, a screw rod nut, a bearing unit and a driving unit;
the lead screw is fixed on the machine tool through a lead screw seat;
the bearing unit comprises a bearing inner fixing sleeve, a bearing outer fixing sleeve and a bearing assembly, the bearing outer fixing sleeve is sleeved on the bearing inner fixing sleeve, a bearing installation space is formed between the bearing outer fixing sleeve and the bearing inner fixing sleeve, the bearing assembly is installed in the bearing installation space, one end of the bearing inner fixing sleeve is a lead screw nut connecting end fixedly connected with one end of a lead screw nut, and the other end of the bearing inner fixing sleeve is a driving unit connecting end fixedly connected with a driving unit;
the screw nut is arranged on the screw, and one end of the screw nut is fixedly connected with the screw nut connecting end of the fixed sleeve in the bearing;
the drive unit comprises a first belt wheel, a second belt wheel, a synchronous belt and a drive motor, the first belt wheel is connected with the drive motor, the second belt wheel is sleeved on the lead screw and is fixedly connected with the drive unit connecting end of the bearing inner fixing sleeve, and the first belt wheel is connected with the second belt wheel through the synchronous belt.
2. The high-speed nut-rotating feed screw device of claim 1, wherein: and a bearing sealing ring is arranged at one end, close to the connecting end of the screw nut, between the bearing inner fixing sleeve and the bearing outer fixing sleeve.
3. The high speed nut-rotating feed screw device of claim 2, wherein: and an oil injection channel communicated with the bearing sealing ring is also arranged on the bearing outer fixing sleeve.
4. A high speed nut-rotating feed screw device as claimed in any one of claims 1 to 3, wherein: and a torque limiter is also arranged between the driving motor and the first belt pulley.
5. The high speed nut-rotating feed screw device of claim 4, wherein: the bearing assembly comprises two groups of angular contact ball bearings which are symmetrically arranged, and each group of angular contact ball bearings comprises at least one angular contact ball bearing.
6. The high speed nut-rotating feed screw device of claim 1, wherein: the bearing inner fixing sleeve is of a stepped shaft sleeve structure, an external thread is arranged at one end, close to the connecting end of the driving unit, of the bearing inner fixing sleeve, and the bearing assembly is fixed on the bearing inner fixing sleeve through a locking nut.
7. The high-speed nut-rotating feed screw device of claim 6, wherein: the bearing fixing device is characterized by further comprising a gland, wherein the gland is fixedly connected with one end, close to the connecting end of the driving unit, of the sliding table and the bearing outer fixing sleeve through screws.
8. A high speed nut-rotating feed screw device as claimed in any one of claims 1 to 3, wherein: and a cooling channel arranged along the axial direction of the screw rod is also arranged in the screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220926219.4U CN217317105U (en) | 2022-04-20 | 2022-04-20 | High-speed nut rotary feed screw device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220926219.4U CN217317105U (en) | 2022-04-20 | 2022-04-20 | High-speed nut rotary feed screw device |
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| Publication Number | Publication Date |
|---|---|
| CN217317105U true CN217317105U (en) | 2022-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220926219.4U Active CN217317105U (en) | 2022-04-20 | 2022-04-20 | High-speed nut rotary feed screw device |
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| CN (1) | CN217317105U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023202086A1 (en) * | 2022-04-20 | 2023-10-26 | 科德数控股份有限公司 | High-speed nut rotating feeding lead screw device |
| CN117344616A (en) * | 2023-12-05 | 2024-01-05 | 新乡县祥宏建筑材料有限公司 | Dustproof road body cutting device for road maintenance |
-
2022
- 2022-04-20 CN CN202220926219.4U patent/CN217317105U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023202086A1 (en) * | 2022-04-20 | 2023-10-26 | 科德数控股份有限公司 | High-speed nut rotating feeding lead screw device |
| CN117344616A (en) * | 2023-12-05 | 2024-01-05 | 新乡县祥宏建筑材料有限公司 | Dustproof road body cutting device for road maintenance |
| CN117344616B (en) * | 2023-12-05 | 2024-02-27 | 新乡县祥宏建筑材料有限公司 | Dustproof road body cutting device for road maintenance |
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