CN212598903U

CN212598903U - Driving main shaft in middle of static pressure centre gripping quick change

Info

Publication number: CN212598903U
Application number: CN202021386984.9U
Authority: CN
Inventors: 周庆成; 金平; 臧笔锋; 舒志国; 李鑫; 董伟
Original assignee: Anhui Lecn Mechanical Equipment Co ltd
Current assignee: Anhui Lecn Mechanical Equipment Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-02-26
Anticipated expiration: 2030-07-15

Abstract

The utility model belongs to the technical field of anchor clamps, a driving spindle in middle of static pressure centre gripping quick change is related to, including spindle drum, bearing frame, hydrostatic bearing, main shaft cylinder body, the spindle drum right side is equipped with the waterproof circle in main shaft right side, the spindle drum left side is equipped with the waterproof circle in main shaft left side, be provided with inlet port one, inlet port two, hydraulic oil inlet port one, hydraulic oil inlet port two on the spindle drum, be provided with the oil circuit ring in the spindle drum, be equipped with the oil gallery on the spindle drum, the oil gallery passes through the oil circuit with the oil circuit ring and is connected, be equipped with the bearing frame in the spindle drum, bearing frame and belt pulley fixed connection, be equipped with the main shaft cylinder body in the bearing frame, be equipped with first hydrostatic bearing, second. The utility model discloses liquid friction is little, and rotation precision is high, and mechanical efficiency is high, and the anti vibration performance is good, and only needs to change chuck and tool, can satisfy the work piece centre gripping of different diameters, length, and the remodelling is easy, the time is short.

Description

Driving main shaft in middle of static pressure centre gripping quick change

Technical Field

The utility model belongs to the technical field of the main shaft, concretely relates to drive main shaft in middle of static pressure centre gripping quick change.

Background

The multi-axis numerical control turning machine tool generally uses a middle driving main shaft to clamp the middle part of a workpiece to drive the workpiece to rotate, and simultaneously finishes turning processing of two ends of the workpiece so as to improve processing precision and efficiency. The intermediate driving main shaft generally adopts an angular contact ball bearing to support the main shaft to rotate, an elastic chuck is arranged in the angular contact ball bearing to clamp a workpiece, the larger the overall dimension of the angular contact ball bearing is, the lower the limit rotating speed is, the influence is caused, the rotating speed of the intermediate driving main shaft generally does not exceed 3500rpm, and the requirement of high rotating speed required by part of workpiece processing cannot be met. Meanwhile, the sealing is difficult due to the structural limitation, the bearing is easy to be damaged by cutting fluid, the service life of the main shaft is short, and the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the driving main shaft is small in liquid friction, high in rotation precision, high in mechanical efficiency and good in vibration resistance, can meet the clamping requirements of workpieces with different diameters and lengths only by replacing the clamping heads and the jigs, and is easy to change types and short in time.

The utility model adopts the technical proposal that:

a static pressure clamping quick-change intermediate driving spindle comprises a spindle seat, a bearing seat, a static pressure bearing and a spindle cylinder body, wherein a spindle right waterproof ring is arranged on the right side of the spindle seat, a spindle left waterproof ring is arranged on the left side of the spindle seat, a first oil inlet hole, a second oil inlet hole, a first hydraulic oil inlet hole and a second hydraulic oil inlet hole are formed in the spindle seat, an oil circuit ring is arranged in the spindle seat, an oil return hole is formed in the spindle seat and connected with the oil circuit ring through an oil circuit, a bearing seat is arranged in the spindle seat and fixedly connected with a belt pulley, the spindle cylinder body is arranged in the bearing seat, a first static pressure bearing and a second static pressure bearing are arranged between the bearing seat and the spindle cylinder body, the spindle cylinder body is connected with the first oil inlet hole and the first hydraulic oil inlet hole through the oil circuit ring, a piston is arranged in, And the second hydraulic oil inlet hole is connected through an oil way ring, the piston is fixedly connected with a pull ring, and two ends of the pull ring are respectively fixedly connected with the first elastic chuck and the second elastic chuck.

Further, the first elastic chuck and the second elastic chuck are spring chucks or rubber chucks.

The utility model has the advantages that: pressure oil is input to the space between two sliding surfaces of the hydrostatic bearing of the main shaft through an external constant-pressure oil supply system so as to support the load. Because the establishment of oil film pressure is not limited by the movement speed, the oil film pressure can normally work at extremely low rotating speed (including zero speed) and higher speed, the rotating precision is high, and the rotating speed of the main shaft can reach more than 10000 rpm. Because of liquid friction, the power loss is small when starting and normally operating, the mechanical efficiency is high, the vibration resistance is good, the spindle is effectively waterproof and sealed, and the service life of the spindle is long. Meanwhile, the extension sleeve is additionally arranged on the standard middle spindle, and the clamping of workpieces with different diameters and lengths can be met only by replacing the clamping head and the jig, so that the workpiece clamping device is easy to change and short in time.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a front view of the present invention;

fig. 3 is a side view of the present invention;

fig. 4 is a rear view of the present invention.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings.

Example 1

As shown in fig. 1-4, the static pressure clamping quick-change intermediate driving spindle comprises a spindle base 1, a bearing seat 2, a first static pressure bearing 3, a second static pressure bearing 4 and a spindle cylinder body 5, wherein a spindle right waterproof ring 7 is arranged on the right side of the spindle base 1, a spindle left waterproof ring 6 is arranged on the left side of the spindle base 1, a first oil inlet 13, a second oil inlet 14, a first hydraulic oil inlet 15 and a second hydraulic oil inlet 16 are arranged on the spindle base 1, an oil circuit ring is arranged in the spindle base 1, an oil return hole 17 is arranged on the spindle base 1, the oil return hole 17 is connected with the oil circuit ring through an oil circuit, the bearing seat 2 is arranged in the spindle base 1, the bearing seat 2 is fixedly connected with a belt pulley 8, the spindle cylinder body 5 is arranged in the bearing seat 2, the first static pressure bearing 3 and the second static pressure bearing 4 are arranged between the bearing, the main shaft cylinder body 5 with the oil inlet hole 13, the hydraulic oil inlet hole 15 pass through the oil circuit ring and are connected, be equipped with piston 9 in the main shaft cylinder body 5, piston 9 with oil inlet hole two 14, hydraulic oil inlet hole two 16 pass through the oil circuit ring and are connected, piston 9 and pull ring 10 fixed connection, pull ring 10 both ends respectively with first collet chuck 11, second collet chuck 12 fixed connection, first collet chuck 11, second collet chuck 12 are the rubber chuck.

The friction of hydrostatic bearing when very big reduction bearing operation, inside spindle right side waterproof circle 7, spindle left side waterproof circle 6 can prevent outside water to get into the bearing, can cause not good influence to the bearing after preventing water and machine oil to mix, through piston motion drive elasticity chuck implement to press from both sides tightly and loosen the work piece, wherein elasticity chuck adopts rubber chuck to increase the elasticity of chuck, makes the installation more convenient.

The utility model discloses a hydrostatic bearing supports the main shaft rotation, and the establishment of oil film pressure does not receive the velocity of motion restriction, can be at extremely low rotational speed (being zero including speed) and normal work under the higher speed, and liquid friction is little, and rotation precision is high, and mechanical efficiency is high, and the anti vibration performance is good, and effectual waterproof sealing, main shaft long service life. Meanwhile, the clamping of workpieces with different diameters and lengths can be realized only by replacing the clamping head and the jig without replacing the main shaft, and the model replacement is easy and short in time.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. The present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only for illustrating the principle of the present invention, and the present invention will have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements all fall into the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a drive main shaft in middle of static pressure centre gripping quick change which characterized in that: the hydraulic oil-saving device comprises a main shaft seat, a bearing seat, a hydrostatic bearing and a main shaft cylinder body, wherein a main shaft right waterproof ring is arranged on the right side of the main shaft seat, a main shaft left waterproof ring is arranged on the left side of the main shaft seat, a first oil inlet hole, a second oil inlet hole, a first hydraulic oil inlet hole and a second hydraulic oil inlet hole are formed in the main shaft seat, an oil circuit ring is arranged in the main shaft seat, an oil return hole is formed in the main shaft seat and connected with the oil circuit ring through an oil circuit, the bearing seat is arranged in the main shaft seat and fixedly connected with a belt pulley, the main shaft cylinder body is arranged in the bearing seat, a first hydrostatic bearing and a second hydrostatic bearing are arranged between the bearing seat and the main shaft cylinder body, the main shaft cylinder body is connected with the first oil inlet hole and the first hydraulic oil inlet hole through the oil circuit ring, the piston is fixedly connected with the pull ring, and two ends of the pull ring are respectively fixedly connected with the first elastic chuck and the second elastic chuck.

2. The hydrostatic clamping quick-change intermediate drive spindle of claim 1, wherein: the first elastic chuck and the second elastic chuck are spring chucks or rubber chucks.