CN219485341U

CN219485341U - Spindle grinding device

Info

Publication number: CN219485341U
Application number: CN202320431700.0U
Authority: CN
Inventors: 魏志伟; 高树刚; 王辉
Original assignee: Anyang Fuwode Machinery Co ltd
Current assignee: Anyang Fuwode Machinery Co ltd
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-08-08
Anticipated expiration: 2033-03-09

Abstract

The utility model relates to a spindle grinding device which comprises a supporting seat and a spindle assembly arranged in the supporting seat, wherein the spindle assembly comprises a spindle body and a sleeve, the spindle body is inserted into the sleeve, a front end cover, a front locking ring, a front bearing group, a pre-tightening assembly, a rear bearing group, a rear locking ring and a rear end cover are sequentially arranged in a gap between the spindle body and the sleeve along the axial direction, a first boss is arranged in the middle of the inner wall of the sleeve, the front bearing group is arranged on the front side of the first boss through the front end cover and the front locking ring, the rear bearing group is arranged on the rear side of the first boss through the rear end cover and the rear locking ring, and the pre-tightening assembly is positioned between the rear bearing group and the first boss. The utility model has the beneficial effects of preventing dust and moisture from entering the main shaft, ensuring the stable operation of the main shaft, and the like.

Description

Spindle grinding device

Technical Field

The utility model relates to a main shaft machining device, in particular to a main shaft grinding machining device, and belongs to the technical field of main shafts.

Background

High-speed cutting, precision manufacturing and numerical control technologies have become important components of modern advanced manufacturing technologies, and are important bases for realizing the development of the national manufacturing technology and equipment industry to the modern technology direction. The use condition of the grinding main shaft has the characteristic of more dust impurities, so that the dust prevention technology of the grinding main shaft has high requirements; in addition, in the grinding process, the main shaft is generally high in rotating speed, and the main shaft can shake severely due to slight jumping, so that the main shaft is damaged, and the grinding main shaft is required to have high stability.

For example, a "precision grinding spindle" disclosed in chinese patent literature, the publication number CN218254546U, includes a spindle housing in which a spindle is mounted. Through optimizing the structure inside the main shaft shell, and then the assembly process of simplified main shaft, be convenient for processing and manufacturing and later maintenance, the bearing of selecting simultaneously is big ball diameter bearing to the overload performance of main shaft is higher, and precision and rotation speed promote by a wide margin. The front end and the rear end of the grinding main shaft are not provided with sealing devices at the pressing covers, dust easily enters the main shaft in the grinding process, in addition, when the main shaft bearing generates axial movement in grinding, the main reason is that the gap of the main shaft rear bearing is bigger, so that an operator is required to adjust the gap of the main shaft rear bearing, and the grinding main shaft is inconvenient to adjust the gap of the bearing, so that the main shaft jumps.

Disclosure of Invention

The utility model mainly aims at the problems existing in the prior art and provides a main shaft grinding device.

The aim of the utility model is mainly achieved by the following scheme:

the main shaft grinding device comprises a supporting seat and a main shaft assembly arranged in the supporting seat, wherein the main shaft assembly comprises a main shaft body and a sleeve, the main shaft body is inserted into the sleeve, a front end cover, a front locking ring, a front bearing group, a pre-tightening assembly, a rear bearing group, a rear locking ring and a rear end cover are sequentially arranged in a gap between the main shaft body and the sleeve along the axial direction, a first boss is arranged in the middle of the inner wall of the sleeve, the front bearing group is arranged on the front side of the first boss through the front end cover and the front locking ring, the rear bearing group is arranged on the rear side of the first boss through the rear end cover and the rear locking ring, and the pre-tightening assembly is positioned between the rear bearing group and the first boss.

Preferably, the front side of the first boss and the rear side of the front locking ring respectively abut against two sides of the outer ring of the front bearing group, the outer wall of the front locking ring is fixedly connected with the inner wall of the sleeve, the inner wall of the front end cover is fixedly connected with the outer wall of the main shaft body, and the rear side of the front end cover abuts against the front side of the inner ring of the front bearing group.

Preferably, the rear side of the pre-tightening assembly and the front side of the rear locking ring respectively abut against two sides of the outer ring of the rear bearing group, the outer wall of the rear locking ring is fixedly connected with the inner wall of the sleeve, the inner wall of the rear end cover is fixedly connected with the outer wall of the main shaft body, and the front side of the rear end cover abuts against the rear side of the inner ring of the rear bearing group.

Preferably, the pretension assembly comprises a front spring seat, a pretension spring and a rear spring seat, wherein two ends of the pretension spring are respectively connected between the front spring seat and the rear spring seat, the front side of the front spring seat is propped against the rear side of the first boss, and the rear side of the rear spring seat is propped against the front side of the outer ring of the rear bearing group.

Preferably, a plurality of long-strip-shaped adjusting holes are formed in the outer wall of the rear spring seat along the axial direction of the rear spring seat, the length direction of each adjusting hole is consistent with the axial direction of the main shaft body, through holes corresponding to the adjusting holes are formed in the sleeve, and adjusting bolts are arranged in the through holes.

Preferably, the inner rings of the front bearing group and the rear bearing group are in interference fit with the main shaft body, and the outer rings of the front bearing group and the rear bearing group are in clearance fit with the sleeve.

Preferably, the front bearing set and the rear bearing set are both angular contact ball bearing sets.

Preferably, the front end of the main shaft body is provided with a mounting seat through a first fixing bolt, and the mounting seat is provided with a grinding wheel through a clamping ring.

Preferably, the rear end of the main shaft body is provided with a belt pulley through a second fixing bolt.

Therefore, compared with the prior art, the utility model has the following advantages:

(1) According to the utility model, the front end cover, the front locking ring, the rear locking ring and the rear end cover are arranged, so that the dustproof effect is good, and the service life of the main shaft can be prolonged;

(2) The utility model can bear radial load and axial load simultaneously through the front bearing group and the rear bearing group, and in addition, the axial clearance of the rear bearing group can be conveniently adjusted and removed through the pre-tightening assembly, so that the runout of the main shaft is small when the main shaft runs, and the machining precision of a workpiece is ensured.

Drawings

FIG. 1 is a schematic view of a construction of the present utility model;

FIG. 2 is a schematic plan view of the present utility model;

FIG. 3 is a cross-sectional view of the present utility model;

fig. 4 is an enlarged view at a in fig. 3;

fig. 5 is an enlarged view at B in fig. 3;

fig. 6 is a schematic view of the structure of the pretensioning assembly in the present utility model.

Illustration of: 1-supporting seat, 2-main shaft body, 3-sleeve, 4-front end housing, 5-front locking ring, 6-front bearing group, 7-pretension subassembly, 8-back bearing group, 9-back locking ring, 10-rear end housing, 11-first boss, 12-front spring seat, 13-pretension spring, 14-back spring seat, 15-regulation hole, 16-through hole, 17-adjusting bolt, 18-first fixing bolt, 19-mount pad, 20-clamp ring, 21-emery wheel, 22-second fixing bolt, 23-belt pulley.

Detailed Description

The technical scheme of the utility model is further specifically described below through specific embodiments and with reference to the accompanying drawings. It should be understood that the practice of the utility model is not limited to the following examples, but is intended to be within the scope of the utility model in any form and/or modification thereof.

In the present utility model, unless otherwise specified, all parts and percentages are by weight, and the equipment, materials, etc. used are commercially available or are conventional in the art. The methods in the following examples are conventional in the art unless otherwise specified. The components and devices in the following examples are, unless otherwise indicated, all those components and devices known to those skilled in the art, and their structures and principles are known to those skilled in the art from technical manuals or by routine experimentation.

Example 1:

as shown in fig. 1, 2 and 3, the utility model provides a technical scheme, namely a spindle grinding device, which consists of a supporting seat 1 and a spindle assembly arranged in the supporting seat 1, wherein the supporting seat 1 is used for installing and fixing the spindle assembly and can drive the spindle assembly to move for grinding.

Specifically, above-mentioned main shaft subassembly includes main shaft body 2 and sleeve 3, main shaft body 2 is pegged graft in sleeve 3, and be equipped with front end housing 4 in proper order along the axial in the clearance of main shaft body 2 and sleeve 3, preceding locking ring 5, preceding bearing group 6, pretension subassembly 7, back bearing group 8, back locking ring 9 and rear end housing 10, the inner wall middle part of sleeve 3 is integrative to be equipped with the first boss 11 of inwards extending, preceding bearing group 6 passes through front end housing 4 and preceding locking ring 5 and installs in the front side of first boss 11, back bearing group 8 passes through rear end housing 10 and back locking ring 9 and installs in the rear side of first boss 11, and pretension subassembly 7 is located between back bearing group 8 and the first boss 11, the axial clearance of back bearing group 8 can be adjusted and got rid of to pretension subassembly 7, make main shaft body 2 during operation axial runout little.

Specifically, the inner rings of the front bearing group 6 and the rear bearing group 8 are in interference fit with the main shaft body 2, the outer rings of the front bearing group 6 and the rear bearing group 8 are in clearance fit with the sleeve 3, the front bearing group 6 and the rear bearing group 8 are angular contact ball bearing groups, and the angular contact ball bearings can bear radial load and axial load at the same time and can work at a higher rotating speed.

Example 2:

as shown in fig. 3, 4 and 5, the present utility model provides another technical solution, and the difference between the main shaft grinding device and the embodiment 1 is that the front side of the first boss 11 and the rear side of the front locking ring 5 respectively press against two sides of the outer ring of the front bearing group 6, the outer wall of the front locking ring 5 is in threaded connection with the inner wall of the sleeve 3, the inner wall of the front end cover 4 is in threaded connection with the outer wall of the main shaft body 2, and the rear side of the front end cover 4 presses against the front side of the inner ring of the front bearing group 6; specifically, the rear side of front end housing 4 is equipped with annular recess, and preceding locking ring 5 is located the recess, and is equipped with the shoulder that the cooperation was used between the outer wall of preceding locking ring 5 and the inner wall of recess, plays dustproof effect, and the outer wall cladding of recess in addition is at sleeve 3's front end outward flange, further improves dustproof effect.

The rear side of the pre-tightening assembly 7 and the front side of the rear locking ring 9 are respectively propped against two sides of the outer ring of the rear bearing group 8, the outer wall of the rear locking ring 9 is in threaded connection with the inner wall of the sleeve 3, the inner wall of the rear end cover 10 is in threaded connection with the outer wall of the main shaft body 2, the front side of the rear end cover 10 is propped against the rear side of the inner ring of the rear bearing group 8, and a shoulder matched with the wall surface contacted by the rear end cover 10 and the rear locking ring 9 is arranged between the wall surfaces, so that a good dustproof effect is achieved.

Example 3:

as shown in fig. 3 and 6, the present utility model provides another technical solution, and the difference between the spindle grinding device and embodiment 1 is that the pre-tightening assembly 7 is composed of a front spring seat 12, a pre-tightening spring 13 and a rear spring seat 14, the front spring seat 12, the pre-tightening spring 13 and the rear spring seat 14 are all sleeved on the outer wall of the spindle body 2, the rear side of the front spring seat 12 and the front side of the rear spring seat 14 are both provided with grooves, two ends of the pre-tightening spring 13 are respectively connected in the grooves between the front spring seat 12 and the rear spring seat 14, the front side of the front spring seat 12 is pressed against the rear side of the first boss 11, the rear side of the rear spring seat 14 is pressed against the front side of the outer ring of the rear bearing set 8, and the pre-tightening assembly 7 is used for eliminating the axial gap of the rear bearing set 8.

Specifically, the outer wall of the rear spring seat 14 is provided with two long adjusting holes 15 along the axial direction of the outer wall, the length direction of each adjusting hole 15 is consistent with the axial direction of the main shaft body 2, a through hole 16 corresponding to each adjusting hole 15 is formed in the sleeve 3, an adjusting bolt 17 is connected to the inner thread of each through hole 16, the inner end of each adjusting bolt 17 is abutted to each adjusting hole 15, axial displacement compensation can be carried out according to the thermal expansion and contraction amount of the main shaft body 2 under actual operation, the radial and axial runout precision of the main shaft body 2 is guaranteed, and then the stability of the main shaft operation is guaranteed.

Example 4:

as shown in fig. 1 and 2, the present utility model provides another technical solution, and the difference between the main shaft grinding device and the embodiment 1 is that the front end of the main shaft body 2 is provided with a mounting seat 19 through a first fixing bolt 18, the mounting seat 19 is provided with a grinding wheel 21 through a clamping ring 20, the clamping ring 20 is in threaded connection with the front protruding position of the mounting seat 19, and the grinding wheel 21 is clamped through the mounting seat 19 and the clamping ring 20, so that the installation and the disassembly are convenient.

In addition, the rear end of the main shaft body 2 is mounted with a pulley 23 through a second fixing bolt 22, and the pulley 23 is conveniently mounted and dismounted.

According to the spindle grinding device, the front end cover, the front locking ring, the rear locking ring and the rear end cover are arranged, so that the spindle grinding device has a good dustproof effect, and the service life of the spindle can be prolonged; through the preceding bearing group and the back bearing group that set up, can bear radial load and axial load simultaneously, in addition through the pretension subassembly that sets up, be convenient for adjust and get rid of the axial clearance of back bearing group, it is little to beat when making the main shaft operation, guarantees the machining precision of work piece, and the practicality is strong.

It should be understood that this example is only illustrative of the utility model and is not intended to limit the scope of the utility model. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. The main shaft abrasive machining device comprises a supporting seat (1) and a main shaft assembly arranged in the supporting seat (1), and is characterized in that: the main shaft subassembly includes main shaft body (2) and sleeve (3), main shaft body (2) are pegged graft in sleeve (3), and are equipped with front end housing (4), preceding locking ring (5), preceding bearing group (6), pretension subassembly (7), back bearing group (8), back locking ring (9) and rear end cap (10) in proper order along the axial in the clearance of main shaft body (2) and sleeve (3), the inner wall middle part of sleeve (3) is equipped with first boss (11), preceding bearing group (6) are installed in the front side of first boss (11) through front end housing (4) and preceding locking ring (5), back bearing group (8) are installed in the rear side of first boss (11) through rear end cap (10) and back locking ring (9), and pretension subassembly (7) are located between back bearing group (8) and first boss (11).

2. The spindle grinding apparatus as set forth in claim 1, wherein: the front side of first boss (11) and the rear side of preceding locking ring (5) support respectively and press in the outer lane both sides of preceding bearing group (6), fixed connection between the outer wall of preceding locking ring (5) and the inner wall of sleeve (3), fixed connection between the inner wall of front end housing (4) and the outer wall of main shaft body (2), and the rear side of front end housing (4) supports the inner circle front side of pressing in preceding bearing group (6).

3. The spindle grinding apparatus according to claim 2, wherein: the rear side of pretension subassembly (7) and the front side of back locking ring (9) support respectively and press in the outer lane both sides of back bearing group (8), fixed connection between the outer wall of back locking ring (9) and the inner wall of sleeve (3), fixed connection between the inner wall of rear end cap (10) and the outer wall of main shaft body (2), and the front side of rear end cap (10) supports the inner circle rear side at back bearing group (8).

4. The spindle grinding apparatus as set forth in claim 1, wherein: the pre-tightening assembly (7) comprises a front spring seat (12), a pre-tightening spring (13) and a rear spring seat (14), wherein two ends of the pre-tightening spring (13) are respectively connected between the front spring seat (12) and the rear spring seat (14), the front side of the front spring seat (12) is propped against the rear side of the first boss (11), and the rear side of the rear spring seat (14) is propped against the front side of the outer ring of the rear bearing group (8).

5. The spindle grinding apparatus as set forth in claim 4, wherein: the outer wall of the rear spring seat (14) is provided with a plurality of long-strip-shaped adjusting holes (15) along the axial direction of the rear spring seat, the length direction of the adjusting holes (15) is consistent with the axial direction of the main shaft body (2), the sleeve (3) is provided with through holes (16) corresponding to the adjusting holes (15), and the through holes (16) are internally provided with adjusting bolts (17).

6. The spindle grinding apparatus as set forth in claim 1, wherein: the inner rings of the front bearing group (6) and the rear bearing group (8) are in interference fit with the main shaft body (2), and the outer rings of the front bearing group (6) and the rear bearing group (8) are in clearance fit with the sleeve (3).

7. The spindle grinding apparatus as set forth in claim 6, wherein: the front bearing group (6) and the rear bearing group (8) are both angular contact ball bearing groups.

8. The spindle grinding apparatus as set forth in claim 1, wherein: the front end of the main shaft body (2) is provided with a mounting seat (19) through a first fixing bolt (18), and the mounting seat (19) is provided with a grinding wheel (21) through a clamping ring (20).

9. The spindle grinding apparatus as set forth in claim 1, wherein: the rear end of the main shaft body (2) is provided with a belt pulley (23) through a second fixing bolt (22).