CN218984387U

CN218984387U - Prevent holding axle grinding machine main shaft structure

Info

Publication number: CN218984387U
Application number: CN202220697661.4U
Authority: CN
Inventors: 赵佳佳
Original assignee: Weihai Hongyu Cnc Machine Tool Co ltd
Current assignee: Weihai Hongyu Cnc Machine Tool Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2023-05-09
Anticipated expiration: 2032-03-28

Abstract

The utility model discloses a spindle structure of an anti-seizing grinding machine, which relates to the technical machinery manufacturing field and comprises a body shell, wherein a spindle is transversely arranged in the body shell in a penetrating and rotating manner, a single-row cylindrical roller bearing is arranged at the front end of the spindle and used for supporting the spindle, a bearing bush is arranged at the rear of the single-row cylindrical roller bearing and positioned at the outer side of the spindle, a bearing bush sleeve is arranged at the outer side of the bearing bush, and the bearing bush sleeve is fixed on the body shell. The bearing bush sleeve is fixed on a body shell, the bearing bush conical surface is matched with the bearing bush sleeve conical surface, the bearing bush adjusting nut is matched with the bearing bush, the gap between the main shaft and the bearing bush is adjusted by rotating the bearing bush adjusting nut, the cylindrical roller bearing is arranged at the front end of the bearing bush and used for supporting the main shaft, when the main shaft does not rotate, the gap between the main shaft and the bearing bush is ensured, as the two ends are provided with the rolling bearings, the rolling bearings are not contacted with the main shaft during rotation, the end face of the main shaft is never worn, and as long as sufficient lubrication is ensured, the bearing is not damaged.

Description

Prevent holding axle grinding machine main shaft structure

Technical Field

The utility model relates to the field of machine manufacturing, in particular to a spindle structure of an anti-seizing grinding machine.

Background

The grinding machine is a machine tool for grinding the surface of a workpiece by utilizing a grinding wheel, and belongs to high-precision processing equipment, a main shaft unit of the grinding machine is a core component of the whole equipment, and the main shaft unit of the high-precision grinding machine mostly adopts a bearing bush structure, wherein the dynamic pressure bearing bush structure is most used, and the bearing bush has large contact area with the main shaft, good rigidity and good shock resistance.

When the dynamic pressure bearing bush structure is started, the main shaft is in direct contact with the bearing bush, and when the rotating speed of the main shaft reaches a certain rotating speed, a pressure oil film is formed between the bearing bush and the main shaft, so that the main shaft floats, and the bearing bush is not in contact with the main shaft after the main shaft floats.

The bearing bush material is cast copper alloy, and the disadvantage of the dynamic pressure bearing bush structure is that the main shaft and the bearing bush rub each other in the main shaft starting process, the long-time starting of the main shaft can lead to the abrasion of the bearing bush and even the shaft holding, the abrasion can lead to the gap between the main shaft and the bearing bush to be enlarged, thereby influencing the main shaft precision, the shaft holding can lead to the scrapping of the bearing bush and the main shaft, and the maintenance is difficult.

Disclosure of Invention

The utility model aims at: in order to solve the problem that the dynamic pressure bearing bush rubs with the bearing bush in the main shaft starting process, the bearing bush is worn or even the bearing bush is worn after the main shaft is started for a long time, the gap between the main shaft and the bearing bush is enlarged due to the wear, so that the main shaft precision is affected, the bearing bush and the main shaft are scrapped due to the bearing bush, and the main shaft structure of the anti-seizing grinding machine is provided.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a prevent holding axle grinding machine spindle structure, includes the body shell, the inside horizontal rotation that runs through of body shell is provided with the main shaft, single row cylindrical roller bearing is installed to the main shaft front end and is used for supporting the main shaft, the main shaft outside is located single row cylindrical roller bearing's rear is provided with the axle bush, the outside of axle bush is provided with the axle bush cover, and the axle bush cover is fixed on the body shell, the outside of main shaft is located the rear of axle bush and is provided with the axle bush adjusting nut with axle bush complex axle bush adjusting nut, through rotatory axle bush adjusting nut adjustment main shaft and axle bush's clearance, the outside of main shaft is located the rear of axle bush adjusting nut and is connected with axial locating piece through the connecting rod that sets up the screw thread, and is connected through two sets of thrust bearing between main shaft and the axial locating piece matter, axial locating piece rear end is "cross" and distributes to have four sets of flutings before by the back in proper order, and the touch pin activity runs through the jackscrew, spring and touch pin in thrust bearing's position department, the rear end of main shaft passes through the thrust roller bearing.

By adopting the scheme, the single-row cylindrical roller bearing is arranged at the front end of the bearing bush, the double-row cylindrical roller bearing at the rear end is used for supporting the rear end of the main shaft, and the rolling bearings are used at the two ends and are not contacted with the main shaft during rotation, so that the end face of the main shaft is never worn.

In a preferred embodiment of the present utility model, the contact surface of the bearing bush and the bearing bush sleeve is a conical surface matched with each other.

By adopting the scheme, the gap between the main shaft and the bearing bush is adjusted by rotating the bearing bush adjusting nut.

In a preferred embodiment of the utility model, the rear part of the jackscrew is provided with a "straight" slot.

By adopting the scheme, the screwing of the jackscrew is facilitated.

In a preferred embodiment of the present utility model, the front end of the contact pin has a semicircular arc structure.

By adopting the scheme, the front end of the touch pin has good stress effect.

In a preferred embodiment of the utility model, the bushing is fastened to the inside of the body shell by means of connecting bolts.

Through adopting above-mentioned scheme, the axle bush cover is connected with the casing is detachable, convenient assembly.

Compared with the prior art, the utility model has the beneficial effects that:

the bearing bush sleeve is fixed on a body shell, the bearing bush conical surface is matched with the bearing bush sleeve conical surface, the bearing bush adjusting nut is matched with the bearing bush, the gap between the main shaft and the bearing bush is adjusted by rotating the bearing bush adjusting nut, the cylindrical roller bearing is arranged at the front end of the bearing bush and used for supporting the main shaft, when the main shaft does not rotate, the gap between the main shaft and the bearing bush is ensured, as the two ends are provided with the rolling bearings, the rolling bearings are not contacted with the main shaft during rotation, the end face of the main shaft is never worn, and as long as sufficient lubrication is ensured, the bearing is not damaged.

Drawings

FIG. 1 is a cross-sectional view of the present utility model;

fig. 2 is an enlarged view of a of fig. 1 according to the present utility model.

In the figure: 1. a body shell; 2. a main shaft; 3. single row cylindrical roller bearings; 4. bearing bush; 5. bearing bush sleeve; 6. bearing bush adjusting nut; 7. a thrust bearing; 8. double-row cylindrical roller bearings; 9. a touch pin; 10. a spring; 11. a jackscrew; 12. a connecting rod; 13. an axial positioning block; 14. and (5) connecting bolts.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, a spindle structure of an anti-seizing grinding machine comprises a body shell 1, a spindle 2 is arranged in the body shell 1 in a transversely penetrating and rotating manner, a single-row cylindrical roller bearing 3 is arranged at the front end of the spindle 2 and used for supporting the spindle 2, a bearing bush 4 is arranged at the rear of the single-row cylindrical roller bearing 3 and positioned at the outer side of the spindle 2, a bearing bush sleeve 5 is arranged at the outer side of the bearing bush 4, the bearing bush 4 and the bearing bush sleeve 5 are fixed on the body shell 1, a conical surface matched with the bearing bush 4 is formed in the contact surface of the bearing bush 4, a bearing bush adjusting nut 6 matched with the bearing bush 4 is arranged at the outer side of the spindle 2, a gap between the spindle 2 and the bearing bush 4 is adjusted through rotating the bearing bush adjusting nut 6, an axial positioning block 13 is connected to the rear of the spindle 2 through a connecting rod 12 provided with threads, two groups of thrust bearings 7 are connected with each other through two groups of thrust bearings 7, four groups of grooves are distributed at the rear ends of the axial positioning block 13 in a cross shape, jackscrews 11, springs 10 and pins 9 are sequentially assembled in the grooves in sequence before the rear, the grooves are movably penetrating through the contact surfaces of the bearing bush sleeve 5, bearing pins 9 are in the positions of the grooves, a matched with the thrust pins 4 are matched with the bearing pins, and the thrust pins are pressed at the front ends of the two groups of the thrust pins 11 through the jack screws 11 through the two groups of the thrust pins, and the jack screws 11 are conveniently pressed by the jack screws, and the jack screws 11 are in the axial positioning pins 11, and are connected by the two through the axial positioning pins 11 through the axial positioning pins and are in the axial positioning bolts, and are in the axial positioning 11, and are conveniently and are in the bearing pins and are in the bearing positions and are in the high by the bearing 11.

Referring to fig. 1, the bearing bush sleeve 5 is fixed on the inner side of the body shell 1 through a connecting bolt 14, so that the bearing bush sleeve 5 and the body shell 1 can be detachably connected and fixed, and the assembly and the maintenance are convenient.

Working principle: the bearing bush sleeve 5 is fixed on the body shell 1, the conical surface of the bearing bush 4 is matched with the conical surface of the bearing bush sleeve 5, the bearing bush adjusting nut 6 is matched with the bearing bush 4, the gap between the main shaft 2 and the bearing bush 4 is adjusted by rotating the bearing bush adjusting nut 6, the single-row cylindrical roller bearing 3 is arranged at the front end of the bearing bush 4 and is used for supporting the main shaft 2, when the main shaft 2 does not rotate, the main shaft 2 and the bearing bush 4 are ensured to be directly in gap (if the main shaft 2 is not in direct contact with the bearing bush 4 due to the gravity, the main shaft 2 and the bearing bush 4 are started to be rubbed with each other instantly, and a static pressure oil film can be formed to protect the main shaft 2 and the bearing bush 4 from contacting each other after a certain rotating speed is reached), and after the cylindrical roller bearing is arranged, the main shaft 2 and the bearing bush 4 can be kept not in contact with each other all the time;

the rear end double-row cylindrical roller bearing 8 is used for supporting the rear end of the main shaft 2, two groups of thrust bearings 7 are used for axial positioning, the pressure of a spring 10 is regulated through a jackscrew 11 to press on a contact pin 9 to regulate the rigidity of the axial positioning, and as the rolling bearings are used at the two ends, the rolling bearings are not contacted with the main shaft 2 during rotation, the end face of the main shaft 2 is never worn, and as long as sufficient lubrication is ensured, the bearings are not damaged.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a prevent holding axle grinding machine spindle structure, includes the body shell, the inside transverse running through of body shell rotates and is provided with main shaft, its characterized in that: the front end of the main shaft is provided with a single-row cylindrical roller bearing for supporting the main shaft, the rear of the main shaft outside the single-row cylindrical roller bearing is provided with a bearing bush, the outer side of the bearing bush is provided with a bearing bush sleeve, the bearing bush sleeve is fixed on a body shell, the rear of the main shaft outside the bearing bush is provided with a bearing bush adjusting nut matched with the bearing bush, the gap between the main shaft and the bearing bush is adjusted by rotating the bearing bush adjusting nut, the rear of the main shaft outside the bearing bush adjusting nut is connected with an axial positioning block through a connecting rod provided with threads, the main shaft is connected with an axial positioning block through two groups of thrust bearings, four groups of grooves are distributed at the rear end of the axial positioning block in a cross shape, jackscrews, springs and touch pins are sequentially assembled from back to front in the grooves, the touch pins movably penetrate through the grooves to be propped against the position of the thrust bearings, and the rear end of the main shaft is connected with the body shell through the cylindrical roller bearing.

2. The anti-seize grinding machine spindle structure as defined in claim 1, wherein: the contact surface of the bearing bush and the bearing bush sleeve is a conical surface matched with each other.

3. The anti-seize grinding machine spindle structure as defined in claim 1, wherein: the rear part of the jackscrew is provided with a straight groove.

4. The anti-seize grinding machine spindle structure as defined in claim 1, wherein: the front end of the contact pin is in a semicircular arc structure.

5. The anti-seize grinding machine spindle structure as defined in claim 1, wherein: the bearing bush sleeve is fixed on the inner side of the body shell through a connecting bolt.