阅读说明：本技术 一种用于防止主轴下垂的固定装置及磨床 (Fixing device for preventing main shaft from sagging and grinding machine ) 是由 许相阳 刘宝钢 李利强 焦维鹏 孙传坤 于 2021-09-30 设计创作，主要内容包括：本发明公开了一种用于防止主轴下垂的固定装置及磨床,主要涉及大型磨削设备改进领域。包括固定支架、拉杆、压板、拧紧螺母；所述固定支架位于磨床主轴后端的下方,且所述固定支架固定安装在磨床的底座上,所述压板的底面设有与磨床主轴后端的外伸部分相配合的压迫曲面,所述拉杆为2根且分别设置于压迫曲面的两侧,所述拉杆的两端设有与其同向延伸的螺柱,拉杆上端的所述螺柱贯穿压板并与拧紧螺母螺纹连接,拉杆下端的所述螺柱贯穿固定支架并与拧紧螺母螺纹连接。本发明的有益效果在于：它能够防止主轴变形下垂,减少加工误差,提升加工精度。(The invention discloses a fixing device for preventing a main shaft from sagging and a grinding machine, and mainly relates to the field of improvement of large-scale grinding equipment. Comprises a fixed bracket, a pull rod, a pressure plate and a tightening nut; the utility model discloses a grinding machine, including clamp plate, pull rod, fixed bolster, clamp plate, pull rod, the fixed bolster is located the below of grinding machine main shaft rear end, just fixed bolster fixed mounting is on the base of grinding machine, the bottom surface of clamp plate is equipped with the oppression curved surface with the overhanging matched with of grinding machine main shaft rear end, the pull rod is 2 and sets up respectively in the both sides of oppression curved surface, the both ends of pull rod are equipped with rather than the syntropy extended double-screw bolt, the pull rod upper end the double-screw bolt run through the clamp plate and with screw up nut threaded connection, the pull rod lower extreme the double-screw bolt run through the fixed bolster and with screw up nut threaded connection. The invention has the beneficial effects that: the spindle can be prevented from deforming and sagging, machining errors are reduced, and machining precision is improved.)

1. A fixing device for preventing a main shaft from sagging is characterized by comprising a fixing support, a pull rod, a pressing plate and a tightening nut;

the fixed bracket is positioned below the rear end of the main shaft of the grinding machine and is fixedly arranged on the base of the grinding machine,

the bottom surface of the pressure plate is provided with a pressing curved surface matched with the overhanging part at the rear end of the main shaft of the grinding machine,

the pull rod is 2 and sets up respectively in the both sides of oppression curved surface, the both ends of pull rod are equipped with rather than the syntropy extended double-screw bolt, the double-screw bolt of pull rod upper end run through the clamp plate and with screw up nut threaded connection, the double-screw bolt of pull rod lower extreme run through the fixed bolster and with screw up nut threaded connection.

2. The fixing device for preventing the main shaft from sagging as claimed in claim 1, wherein the pressing curved surface is an arc-shaped curved surface, the inner diameter of the pressing curved surface is adapted to the diameter of the overhanging portion at the rear end of the main shaft of the grinding machine, and the arc-shaped curved surface is in contact with the top peripheral surface of the overhanging portion at the rear end of the main shaft of the grinding machine.

3. The fixing device for preventing the main shaft from sagging as claimed in claim 1, wherein the pressing curved surface is centrally disposed on a bottom surface of the fixing bracket, and the pulling rod is disposed in bilateral symmetry with respect to the fixing bracket.

4. The fixing device for preventing the main shaft from sagging as claimed in claim 1, wherein the two sides of the pressure plate are respectively provided with a first through hole, the stud at the upper end of the pull rod penetrates through the first through hole and is in clearance fit with the first through hole, the fixing bracket is provided with two second through holes corresponding to the first through hole, and the stud at the lower end of the pull rod penetrates through the second through holes and is in clearance fit with the second through holes.

5. The fixing device for preventing the main shaft from sagging as claimed in claim 1, wherein the rear side of the pressing plate is provided with a baffle plate, and the center of the baffle plate is provided with an arc-shaped receding groove.

6. A grinding machine comprising a headstock in which is mounted a grinding machine spindle, characterised in that an overhang at the rear end of the grinding machine spindle is fitted with a fixing means for preventing the spindle from sagging as claimed in any one of claims 1 to 5.

Technical Field

The invention relates to the field of improvement of large-scale grinding equipment, in particular to a fixing device for preventing a main shaft from sagging and a grinding machine.

Background

Heavy cylindrical grinder is because of the overhanging more of the inside main shaft of headstock during processing, and the unable support in overhanging department bottom, thereby the overhanging axle position of headstock can take place to hang down when the large-scale axle type part of former grinding machine processing.

Disclosure of Invention

The invention aims to provide a fixing device for preventing a main shaft from sagging and a grinding machine, which can prevent the main shaft from deforming and sagging, reduce machining errors and improve machining precision.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a fixing device for preventing a main shaft from sagging comprises a fixing support, a pull rod, a pressing plate and a tightening nut;

the fixed bracket is positioned below the rear end of the main shaft of the grinding machine and is fixedly arranged on the base of the grinding machine,

the bottom surface of the pressure plate is provided with a pressing curved surface matched with the overhanging part at the rear end of the main shaft of the grinding machine,

the pull rod is 2 and sets up respectively in the both sides of oppression curved surface, the both ends of pull rod are equipped with rather than the syntropy extended double-screw bolt, the double-screw bolt of pull rod upper end run through the clamp plate and with screw up nut threaded connection, the double-screw bolt of pull rod lower extreme run through the fixed bolster and with screw up nut threaded connection.

The pressing curved surface is an arc-shaped curved surface, the inner diameter of the pressing curved surface is matched with the diameter of the extending part at the rear end of the grinding machine spindle, and the arc-shaped curved surface is in contact with the circumferential surface of the top of the extending part at the rear end of the grinding machine spindle.

The compression curved surface is arranged on the bottom surface of the fixed support in the middle, and the pull rods are arranged in bilateral symmetry relative to the fixed support.

The two sides of the pressing plate are respectively provided with a first through hole, the stud at the upper end of the pull rod penetrates through the first through hole and is in clearance fit with the first through hole, the fixed support is provided with two second through holes corresponding to the first through hole, and the stud at the lower end of the pull rod penetrates through the second through holes and is in clearance fit with the second through holes.

The rear side of the pressing plate is provided with a baffle, and the center of the baffle is provided with an arc-shaped abdicating groove.

The grinding machine comprises a headstock, a grinding machine spindle is mounted in the headstock, and the fixing device for preventing the spindle from sagging is mounted on the overhanging part at the rear end of the grinding machine spindle.

Compared with the prior art, the invention has the beneficial effects that:

when the grinding machine works, the machining precision of the small shaft part can be maintained when the small shaft part is ground, especially when a large wind power main shaft is ground, the machining precision can still be maintained, and the problem that the precision cannot be guaranteed when the large shaft part is ground is solved. And the downward pressure of the overhanging part at the rear end of the main shaft can be adjusted according to the weight of the workpiece.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention (side view of the grinding machine).

Fig. 2 is a right side view of fig. 1 of the present invention.

Fig. 3 is an overall schematic view of embodiment 1 of the present invention.

Fig. 4 is an overall schematic view of embodiment 1 of the present invention.

Reference numerals shown in the drawings:

1. an overhang portion at the rear end of the main shaft; 2. fixing a bracket; 3. a pull rod; 4. pressing a plate; 5. screwing down the nut; 6. a stud; 7. a baffle plate; 8. pressing the curved surface; 9. a fin plate; 10. a transverse plate; 11. a vertical plate.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.

The instruments, reagents, materials and the like used in the following examples are conventional instruments, reagents, materials and the like in the prior art and are commercially available in a normal manner unless otherwise specified. Unless otherwise specified, the experimental methods, detection methods, and the like described in the following examples are conventional experimental methods, detection methods, and the like in the prior art.

Example 1: fixing device for preventing main shaft from sagging

The fixing device is used for a main shaft in a grinding machine headstock which is used in a matched mode and comprises a fixing support 2, a pull rod 3, a pressing plate 4 and a tightening nut 5.

The fixed support 2 is located below the rear end of the main shaft of the grinding machine, and the fixed support 2 is fixedly installed on a base of the grinding machine to support and fix the bottom of the grinding machine. The fixing support 2 is specifically L-shaped and comprises a transverse plate 10 and a vertical plate 11, the vertical plate 11 is used for being fixedly mounted on a base of the grinding machine through a bolt, and the inner side of the transverse plate 10, which is adjacent to the grinding machine, is perpendicular to the top side of the vertical plate 11 and is fixedly welded to obtain a right-angled fixing structure. The transverse plate 10 is provided with a second through hole which is vertically through.

The clamp plate 4 is including the arc that sets up between two parties, the arc is equipped with in the bottom surface with the overhanging 1 matched with oppression curved surface 8 of grinding machine main shaft rear end, oppression curved surface 8 is the arc curved surface, the internal diameter of oppression curved surface 8 suits with the diameter of the overhanging of grinding machine main shaft rear end, just the arc curved surface contacts with the global in top of the overhanging of grinding machine main shaft rear end. The realization is to the inseparable cooperation of main shaft rear end, obtains the oppression face to the main shaft, and the cooperation face of arcwall face has better evenly distributed effect to the oppression power.

The two sides of the arc-shaped plate are provided with fin plates 9, and the fin plates 9 are provided with first through holes in a penetrating manner. The first through holes are arranged in bilateral symmetry relative to the arc-shaped pressing curved surface 8, and the uniform pressing effect on the main shaft is favorably obtained.

The rear side of the pressing plate 4 is provided with a baffle 7, and the center of the baffle 7 is provided with an arc-shaped abdicating groove. The spindle is convenient to position and match quickly.

The upper end and the lower end of the pull rod 3 are respectively provided with a stud 6, the studs 6 are rod pieces consistent with the length direction of the pull rod 3, external threads matched with the screwing nuts 5 in a threaded mode are arranged on the peripheral surface of the studs 6, the studs 6 are consistent with the pull rod 3 in the axial direction, and the pull rod 3 is a rod piece with an upper stud 6 and a lower stud 6. For convenience of description, an upper stud 6 is defined at the upper end of the draw bar 3, and a lower stud 6 is defined at the lower end of the draw bar 3.

The upper stud 6 penetrates through the first through hole, and the upper stud 6 is in threaded fit with the tightening nut 5.

The lower stud 6 penetrates through the second through hole, and the lower stud 6 is in threaded fit with the tightening nut 5.

The pull rod 3 is fixed based on the matching with the tightening nut 5, so that the pressing plate 4 is pulled close to the fixing support 2 downwards, and the pressing effect on the main shaft is obtained.

Through this device cooperation on the grinding machine main shaft, the overhanging part of rear end at the main shaft uses semicircular clamp plate 4 cooperation stud 6 pull rod 3 to connect the base and compresses tightly, and the nut that compresses tightly the state and can use stud 6 adjusts from top to bottom to the front end is flagging when avoiding the heavy part of grinding, and then guarantees the machining precision of part, and the overdraft can be adjusted according to the difference of work piece weight.

Example 2: grinding machine

The fixing device for preventing the main shaft from sagging comprises a base, a headstock and other conventional grinding machine structures in the prior art, wherein the grinding machine main shaft is arranged in the headstock, the rear end of the grinding machine main shaft is matched with the extending part of the headstock to form a pressing plate 4, a pressing curved surface 8 on the pressing plate 4 is contacted with the circumferential surface of the top of the rear end of the grinding machine main shaft, the fixing support 2 is arranged on the grinding machine base, and the tightening nuts 5 at the two ends of the pull rod 3 are adjusted to obtain a proper pressing state, so that the front end sagging during the grinding of heavy parts can be avoided.