CN213196477U - Main shaft supporting structure of drilling power head - Google Patents
Main shaft supporting structure of drilling power head Download PDFInfo
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- CN213196477U CN213196477U CN202021815269.2U CN202021815269U CN213196477U CN 213196477 U CN213196477 U CN 213196477U CN 202021815269 U CN202021815269 U CN 202021815269U CN 213196477 U CN213196477 U CN 213196477U
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- roller bearing
- tapered roller
- row tapered
- main shaft
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Abstract
The utility model provides a drilling unit head main shaft supporting structure, install the main shaft on the box including box and rotation, the end cover is covered to the box front end, is provided with first single-row tapered roller bearing and two one-way thrust ball bearings along the axial between the front end of main shaft and the box, and first single-row tapered roller bearing is located two one-way thrust ball bearings's the outside, is provided with the single-row tapered roller bearing of second between the rear end of main shaft and the box, and the single-row tapered roller bearing of second sets up back to back with first single-row tapered roller bearing. The utility model enables the main shaft to bear axial and radial loads simultaneously, meets the stress requirements of the processed products in the states of semi-finish boring, semi-finish milling plane and semi-finish countersinking plane, and realizes the expansion of the functions of the equipment; the function exchange is simple and convenient, the installation adjustment dimension is reliable, simultaneously, the main structure of the original drilling power head is not influenced, and the utilization rate of equipment is improved.
Description
Technical Field
The utility model belongs to the technical field of machining, especially, relate to a drilling unit head main shaft supporting structure.
Background
In the machining equipment, the Z25 drilling power head is a small power head commonly used in factories and used for drilling holes with the diameter smaller than that of the drill bit
The hole machining of the main shaft power head adopts two one-way thrust ball bearings and a single-row radial cylindrical roller bearing at the front end and a single-row radial ball bearing at the rear end, and the structure is characterized in that the large radial force and the relatively small axial force generated in drilling are mainly borne, and the machining precision is between IT10-IT13, so that the hole machining is generally used for machining products with low precision, such as drilling, expanding, hinging and the like. However, in order to realize the processing of boring and countersinking planes, a factory needs to purchase the same type of boring head and milling head to meet the technical requirements of product processing, and if the large-scale boring head is used, the same type of boring head and milling head is purchased, which is relatively high in cost.
Therefore, a main shaft supporting structure of the drilling power head is needed to be designed, the drilling power head is transformed into a multipurpose power head for semi-finish boring, semi-finish milling and semi-finish reaming a plane so as to meet the product requirement of semi-finish boring, semi-finish milling and semi-finish reaming the plane, and even reach the product requirement of finish boring, finish milling and finish reaming the plane when the cutting allowance is not large.
SUMMERY OF THE UTILITY MODEL
In view of the above prior art's shortcoming, the utility model aims to provide a drilling unit head main shaft bearing structure for drilling unit head only is applicable to and bores, expands, reams processing among the solution prior art, and can't possess the problem of bore hole and ream planar processing simultaneously.
For realize above-mentioned purpose and other relevant purpose, the utility model provides a drilling unit head main shaft bearing structure, install including box and rotation main shaft on the box, the box front end is covered and is equipped with the end cover, the front end of main shaft with be provided with first single-row tapered roller bearing and two one-way thrust ball bearings along the axial between the box, just first single-row tapered roller bearing is located two one-way thrust ball bearing's the outside, the rear end of main shaft with be provided with second single-row tapered roller bearing between the box, just second single-row tapered roller bearing with first single-row tapered roller bearing sets up back to back.
Furthermore, be provided with the clamping ring between two one-way thrust ball bearings, the clamping ring card is established on the box, first single-row tapered roller bearing's outer lane left end with be provided with the bush between the clamping ring, just first single-row tapered roller bearing's inner circle left end with be provided with the clamping ring between the one-way thrust ball bearing of clamping ring right-hand member.
Further, the main shaft has a step portion, and the right end of the inner ring of the first single-row tapered roller bearing abuts against the step portion.
Further, the right end of the outer ring of the first single-row tapered roller bearing is abutted to an adjusting sleeve, an adjusting plug screw is arranged at the right end of the adjusting sleeve, and the adjusting plug screw is in threaded connection with the end cover.
Further, a base plate is arranged between the end cover and the box body, an end cover nut group is further arranged at the front end of the end cover, and the adjusting screw plug is in threaded connection with the end cover nut group.
Furthermore, the end cover nut group comprises a first end cover nut and a second end cover nut, the second end cover nut is covered on the adjusting screw, and the first end cover nut is located between the second end cover nut and the end cover.
Furthermore, a locking nut is sleeved in the middle of the main shaft, and a spacer is arranged between the locking nut and the one-way thrust ball bearing at the left end of the compression ring.
Further, the number of the locking nuts is two along the axial direction of the main shaft.
Furthermore, a first blocking sleeve and a second blocking sleeve are respectively arranged at the left end and the right end of the second single-row tapered roller bearing, the first blocking sleeve is abutted against the left end of the inner ring of the second single-row tapered roller bearing, the second blocking sleeve is abutted against the right end of the inner ring of the second single-row tapered roller bearing, and an adjusting ring is arranged between the second blocking sleeve and the right end of the outer ring of the second single-row tapered roller bearing.
Furthermore, the main shaft is provided with elastic retainer rings for shafts at the left end and the right end of the second single-row tapered roller bearing, and the elastic retainer rings are used for limiting the axial displacement of the first retaining sleeve and the second retaining sleeve respectively.
As described above, the utility model discloses a drilling unit head main shaft supporting structure has following beneficial effect:
the drilling power head platform is fully utilized, a stress structure of a main shaft bearing of the drilling power head is improved, and two single-row tapered roller bearings are arranged at the front end and the rear end of the main shaft back to back, so that the main shaft can bear axial and radial loads at the same time, the stress requirements of a processed product in the states of semi-precision boring, semi-precision milling plane and semi-precision spot facing plane are met, and the expansion of the function of equipment is realized;
the drilling power head can be interchanged between the drilling function and the state functions of semi-precision boring, semi-precision milling plane and semi-precision reaming plane, is simple and convenient, is reliable in installation and adjustment, does not affect the main body structure of the original drilling power head, and improves the utilization rate of equipment;
the geometric precision and the processing precision of the equipment are improved, and the processing quality of the product is stable and reliable;
and by adopting universal parts, the manufacturing is simple, the modification cost is low, and the capital of outsourcing equipment is saved.
Drawings
FIG. 1 is a schematic view of a drilling head spindle support structure;
fig. 2 is a schematic view of the main shaft supporting structure of the drilling power head of the present invention.
Description of reference numerals
1 a-a box body; 2 a-a main shaft; 3 a-a first spacer sleeve; 4 a-single row radial ball bearing; 5 a-a second spacer sleeve; 6 a-one-way thrust ball bearing; 7 a-a pressure ring; 8 a-one-way thrust ball bearing; 9 a-single row centripetal cylindrical roller bearing; 10 a-an adjusting sleeve; 11 a-end cap; 12 a-a liner;
1 b-a box body; 2 b-a main shaft; 3 b-elastic collar for shaft; 4 b-a first spacer sleeve; 5 b-a second single row tapered roller bearing; 6 b-an adjustment ring; 7 b-a second spacer sleeve; 8 b-elastic collar for shaft; 9 b-a locking nut; 10 b-spacer sleeve; 11 b-a one-way thrust ball bearing; 12 b-a pressure ring; 13 b-a one-way thrust ball bearing; 14 b-a first single row tapered roller bearing; 15 b-an adjusting sleeve; 16 b-end cap; 17 b-a first end cap nut; 18 b-adjusting screw plug; 19 b-second end cap nut; 20 b-a backing plate; 21 b-a clamping ring; 22 b-bushing.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Referring to fig. 1, the main shaft supporting structure of the drilling power head is characterized in that the main shaft is rotatably arranged in a box body 1a, an end cover 11a is arranged at the front end of the box body 1a, the front end of the main shaft 2a is supported by a single-row radial cylindrical roller bearing 9a and two one-way thrust ball bearings 6a and 8a, the rear end of the main shaft is supported by a single-row radial ball bearing 4a, the main shaft mainly bears large radial force and relatively small axial force generated in drilling, the machining precision is between IT10 and IT13, and the main shaft supporting structure is suitable for machining products with low precision such as drilling, expanding and hinging.
In order to can make full use of equipment, make the drilling unit head can expand application range, make it possess half smart bore hole, half finish milling plane and half smart planar function of reaming, refer to fig. 2 and show, the utility model provides a drilling unit head main shaft bearing structure, make full use of drilling head platform reforms transform the atress structure that the drilling head bore bearing. Drilling unit head main shaft bearing structure includes box 1b and rotates and installs main shaft 2b on the box 1b, box 1b front end covers and is equipped with end cover 16b, main shaft 2 b's front end with be provided with first single row tapered roller bearing 14b and two one-way thrust ball bearings 11b along the axial between the box 1b, just first single row tapered roller bearing 14b is located two one-way thrust ball bearings 11 b's the outside, main shaft 2 b's rear end with be provided with second single row tapered roller bearing 5b between the box 1b, just second single row tapered roller bearing 5b with first single row tapered roller bearing 14b sets up back to back.
Specifically, the single-row radial cylindrical roller bearing 9a (adopting the model D2212) which mainly bears the radial force at the front end in fig. 1 is replaced by the first single-row tapered roller bearing 14b (adopting the model D7212) which can simultaneously bear the axial load and the radial load in fig. 2, the single-row radial ball bearing 4a (adopting the model 211) which mainly bears the radial force and the axial force at the rear end in fig. 1 is replaced by the second single-row tapered roller bearing 5b (adopting the model D7211) which can simultaneously bear the axial load and the radial load, and the second single-row tapered roller bearing 5b and the first single-row tapered roller bearing 14b are arranged back to back. Therefore, on one hand, the stress condition is considered, so that the cutting force borne by the main shaft 2b meets the stress requirement of a processed product in a semi-finish boring semi-finish milling plane and semi-finish reaming plane state; on the other hand, the mounting mode is considered, back-to-back mounting is adopted, all bearings and other auxiliary parts can be mounted on the main shaft 2b, and then the assembled main shaft 2b is mounted in the box body 1b, so that the mounting position is ensured, and the mounting is convenient.
Wherein, be provided with clamping ring 12b between two one-way thrust ball bearing 11b, clamping ring 12b card is established on box 1b, clamping ring 12 b's outer wall with box 1 b's inner wall supports and leans on, and clamping ring 12 b's inner wall cover is established on main shaft 2b, first single-row tapered roller bearing 14 b's outer lane left end with be provided with bush 22b between the clamping ring 12b, bush 22 b's outer wall with box 1 b's inner wall supports and leans on, just first single-row tapered roller bearing 14 b's inner circle left end with be provided with clamping ring 21b between the one-way thrust ball bearing 11b of clamping ring 12b right-hand member. Specifically, it is considered that the inner diameter and the outer diameter of the replaced first single-row tapered roller bearing 14b are the same as those of the original single-row radial cylindrical roller bearing 9a, but the structure and the thickness are different, and the axial lengths of the pressing ring 7a and the bush 12a on the original main shaft 2a need to be adjusted according to the required thickness of the replaced bearing.
The main shaft 2b has a stepped portion, and the right end of the inner ring of the first single-row tapered roller bearing 14b abuts against the stepped portion.
In addition, the right end of the outer ring of the first single-row tapered roller bearing 14b is abutted against an adjusting sleeve 15b, the outer wall of the adjusting sleeve 15b is abutted against the inner walls of the box body 1b and the end cover 16b, an adjusting screw plug 18b is arranged at the right end of the adjusting sleeve 15b, and the adjusting screw plug 18b is in threaded connection with the end cover 16 b. Specifically, the thickness of the adjusting sleeve 15b needs to be adjusted according to the thickness of the outer ring of the first single-row roller bearing.
A backing plate 20b is arranged between the end cover 16b and the box body 1b, an end cover 16b nut group is further arranged at the front end of the end cover 16b, and the adjusting screw plug 18b is in threaded connection with the end cover 16b nut group. The end cover 16b nut set comprises a first end cover nut 17b and a second end cover nut 19b, the second end cover nut 19b is arranged on the adjusting screw plug 18b in an overlapping mode, and the first end cover nut 17b is located between the second end cover nut 19b and the end cover 16 b.
If the axial play of the first single-row tapered roller bearing 14b and the two one-way thrust ball bearings 11b needs to be adjusted, the lengths of the compression ring 12b, the bush 22b, the adjusting sleeve 15b and the backing plate 20b in the axial direction can be adjusted according to requirements.
The middle part cover of main shaft 2b is equipped with lock nut 9b, lock nut 9b with be provided with spacer 10b between the one-way thrust ball bearing 11b of clamping ring 12b left end. Specifically, the spacer sleeve 10b is sleeved on the main shaft 2b, and the two locking nuts 9b are arranged along the axial direction of the main shaft 2b so as to enhance the locking force of the two locking nuts and ensure that the bearing of the one-way thrust ball bearing 11b cannot move in the axial direction.
The rear end of the main shaft 2b is replaced by an original single-row radial ball bearing 4a (adopting a model 211) to form a second single-row tapered roller bearing 5b (adopting a model D7211) capable of bearing axial and radial loads, a first retaining sleeve 4b and a second retaining sleeve 7b are respectively arranged at the left end and the right end of the second single-row tapered roller bearing 5b, the first retaining sleeve 4b is abutted against the left end of an inner ring of the second single-row tapered roller bearing 5b, the second retaining sleeve 7b is abutted against the right end of the inner ring of the second single-row tapered roller bearing 5b, and an adjusting ring 6b is arranged between the second retaining sleeve 7b and the right end of an outer ring of the second single-row tapered roller bearing 5 b. Specifically, it is considered that the replaced second single-row tapered roller bearing 5b has the same inner diameter and outer diameter as the original single-row radial ball bearing 4a, but the structure and thickness are different, the structure of the first retaining sleeve 3a and the second retaining sleeve 5a on the original main shaft 2a needs to be changed according to the replaced bearing, and the first retaining sleeve 4b and the second retaining sleeve 7b are changed to respectively limit the inner ring and the outer ring of the second single-row tapered roller bearing 5b in the axial direction, and meanwhile, an adjusting ring 6b is arranged to adjust the pretightening force of the outer ring of the second single-row tapered roller bearing 5 b.
And, the main shaft 2b is provided with elastic collars 3b for shaft at both left and right ends of the second single-row tapered roller bearing 5b, which respectively limit axial displacements of the first and second retaining sleeves 4b, 7 b.
If the axial clearance of the second single-row tapered roller bearing 5b needs to be adjusted, the respective axial lengths of the first retaining sleeve 4b, the second retaining sleeve 7b and the adjusting ring 6b can be adjusted according to requirements.
The drilling power head can respectively execute different processing operations according to the requirements, and when the drilling operation (drilling, expanding and reaming) needs to be executed, the structure in the figure 1 is adopted; when the semi-fine boring and semi-fine milling plane and semi-fine countersinking plane operation needs to be executed, the structure in the figure 2 is adopted, the structure of the main shaft 2b does not need to be changed, only the support part before modification and the support part after modification are distinguished in the function exchange process, and the corresponding part is replaced according to the function requirement.
The support member prior to modification comprises: a single-row radial cylindrical roller bearing 9a (adopting a model D2212) at the front end of the main shaft 2a, a single-row radial ball bearing 4a (adopting a model 211) at the rear end of the main shaft 2a, a first retaining sleeve 3a, a second retaining sleeve 5a, a pressure ring 7a, an adjusting sleeve 10a and a bushing 12 a; the retrofitted support member comprises: the device comprises a first single-row tapered roller bearing 14b (adopting a model D7212) at the front end of a main shaft 2b, a second single-row tapered roller bearing 5b (adopting a model D7211) at the rear end of the main shaft 2b, a first retaining sleeve 4b, an adjusting ring 6b, a second retaining sleeve 7b, a pressing ring 12b, an adjusting sleeve 15b, a bushing 22b and a pressing ring 21 b.
Through tests, the geometric precision of the modified equipment is improved, and specifically, the near-end runout of the main shaft 2b of the original equipment before modification is 0.05mm, and the far-end runout is 0.15 mm; the near end of the main shaft 2b of the improved equipment has a runout of 0.015mm, and the far end has a runout of 0.035 mm.
In addition, the machining precision of the equipment is improved from IT10-IT13 before modification to that the boring hole reaches IT8, and the milling surface reaches IT 9.
In summary, in the drilling power head spindle supporting structure provided by the embodiment of the present invention, the drilling power head platform is fully utilized, the stress structure of the drilling power head spindle bearing is modified, and two single-row tapered roller bearings arranged back to back at the front and rear ends of the spindle enable the spindle to simultaneously bear axial and radial loads, thereby satisfying the stress requirements of the processed product in the states of semi-precision boring, semi-precision milling plane and semi-precision reaming plane, and realizing the expansion of the device functions; the drilling power head can be interchanged between the drilling function and the state functions of semi-precision boring, semi-precision milling plane and semi-precision reaming plane, is simple and convenient, is reliable in installation and adjustment, does not affect the main body structure of the original drilling power head, and improves the utilization rate of equipment; the geometric precision and the processing precision of the equipment are improved, and the processing quality of the product is stable and reliable; and by adopting universal parts, the manufacturing is simple, the modification cost is low, and the capital of outsourcing equipment is saved.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a drilling unit head main shaft supporting structure, includes the box and rotates to install main shaft on the box, the cover is equipped with its characterized in that to the box front end: the front end of main shaft with be provided with first single-row tapered roller bearing and two one-way thrust ball bearings along the axial between the box, just first single-row tapered roller bearing is located two one-way thrust ball bearing's the outside, the rear end of main shaft with be provided with second single-row tapered roller bearing between the box, just second single-row tapered roller bearing with first single-row tapered roller bearing sets up back to back.
2. The drilling head spindle support structure of claim 1, wherein: the compression ring is arranged between the two one-way thrust ball bearings, the compression ring is clamped on the box body, the outer ring left end of the first single-row tapered roller bearing is provided with a lining between the compression ring, and the inner ring left end of the first single-row tapered roller bearing is provided with a compression ring between the one-way thrust ball bearings at the right end of the compression ring.
3. The drilling head spindle support structure of claim 2, wherein: the main shaft is provided with a step part, and the right end of the inner ring of the first single-row tapered roller bearing is abutted against the step part.
4. The drilling head spindle support structure of claim 2, wherein: the right end of the outer ring of the first single-row tapered roller bearing is abutted to an adjusting sleeve, an adjusting plug screw is arranged at the right end of the adjusting sleeve, and the adjusting plug screw is in threaded connection with the end cover.
5. The drilling head spindle support structure of claim 4, wherein: the adjusting screw plug is characterized in that a base plate is arranged between the end cover and the box body, an end cover nut group is further arranged at the front end of the end cover, and the adjusting screw plug is in threaded connection with the end cover nut group.
6. The drilling head spindle support structure of claim 5, wherein: the end cover nut group comprises a first end cover nut and a second end cover nut, the second end cover nut is arranged on the adjusting screw in a covering mode, and the first end cover nut is located between the second end cover nut and the end cover.
7. The drilling head spindle support structure of claim 2, wherein: the middle part cover of main shaft is equipped with lock nut, lock nut with be provided with the spacer between the one-way thrust ball bearing of clamping ring left end.
8. The drilling head spindle support structure of claim 7, wherein: two locking nuts are arranged along the axial direction of the main shaft.
9. The drilling head spindle support structure of claim 1, wherein: the left end and the right end of the second single-row tapered roller bearing are respectively provided with a first blocking sleeve and a second blocking sleeve, the first blocking sleeve is abutted to the left end of the inner ring of the second single-row tapered roller bearing, the second blocking sleeve is abutted to the right end of the inner ring of the second single-row tapered roller bearing, and an adjusting ring is arranged between the second blocking sleeve and the right end of the outer ring of the second single-row tapered roller bearing.
10. The drilling head spindle support structure of claim 9, wherein: and elastic collars for shafts are arranged at the left end and the right end of the main shaft, which are positioned on the second single-row tapered roller bearing, and are used for respectively limiting the axial displacement of the first blocking sleeve and the second blocking sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021815269.2U CN213196477U (en) | 2020-08-27 | 2020-08-27 | Main shaft supporting structure of drilling power head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021815269.2U CN213196477U (en) | 2020-08-27 | 2020-08-27 | Main shaft supporting structure of drilling power head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213196477U true CN213196477U (en) | 2021-05-14 |
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ID=75841630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021815269.2U Active CN213196477U (en) | 2020-08-27 | 2020-08-27 | Main shaft supporting structure of drilling power head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213196477U (en) |
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2020
- 2020-08-27 CN CN202021815269.2U patent/CN213196477U/en active Active
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