阅读说明：本技术 一种设置在滚齿机上的转盘 (Rotary disc arranged on gear hobbing machine ) 是由 陈伦安 江红波 廖承渝 杨勇 樊淋 蔡福宁 于 2020-07-16 设计创作，主要内容包括：本发明公开了一种设置在滚齿机上的转盘,包括动力机构,所述动力机构通过连接机构将旋转动力传递至主轴,所述主轴与刀架底座连接,进而带动所述刀架底座转动以调整转角,还包括消隙装置。本发明利用电机和锥度齿轮副驱动主轴转动,进而带动刀架转动固定的角度,并且在主轴的两端设置了圆锥滚子轴承,解决了刀架锁紧时因键传动扭矩固有的键与键槽间隙、电机自身背隙、传统减速机固有背隙导致的锁不住的问题。(The invention discloses a rotary table arranged on a gear hobbing machine, which comprises a power mechanism, wherein the power mechanism transmits rotary power to a main shaft through a connecting mechanism, the main shaft is connected with a tool rest base so as to drive the tool rest base to rotate to adjust a rotating angle, and the rotary table further comprises a clearance eliminating device. The invention utilizes the motor and the taper gear pair to drive the main shaft to rotate, further drives the tool rest to rotate by a fixed angle, and the tapered roller bearings are arranged at the two ends of the main shaft, thereby solving the problem that the tool rest can not be locked due to the clearance between the key and the key groove inherent in the key transmission torque, the backlash of the motor and the backlash inherent in the traditional speed reducer when being locked.)

1. The utility model provides a carousel of setting on gear hobbing machine which characterized in that: the tool rest comprises a power mechanism, wherein the power mechanism transmits rotary power to a main shaft through a connecting mechanism, the main shaft is connected with a tool rest base so as to drive the tool rest base to rotate to adjust a rotating angle, and the tool rest further comprises a clearance eliminating device.

2. The rotary table provided on a gear hobbing machine according to claim 1, characterized in that: the anti-backlash device comprises a tapered roller bearing arranged between the main shaft and the main shaft flange.

3. The rotary table provided on a gear hobbing machine according to claim 2, characterized in that: the number of the tapered roller bearings is 4, and the tapered roller bearings are respectively arranged at two ends of the main shaft.

4. The rotary table provided on a gear hobbing machine according to claim 3, characterized in that: the connecting mechanism comprises a taper gear shaft and a bevel gear which are meshed with each other, and the bevel gear is meshed with the main shaft.

5. The rotary table provided on a gear hobbing machine according to claim 4, characterized in that: and an adjusting gasket is arranged between the taper gear shaft and the connecting disc connected with the taper gear shaft.

6. The rotary table provided on a gear hobbing machine according to claim 5, characterized in that: the power mechanism comprises a motor and a harmonic reducer which are sequentially connected, and the harmonic reducer is connected with the taper gear shaft.

7. The rotary table provided on a gear hobbing machine according to claim 6, characterized in that: and a gland is arranged between the harmonic reducer and the bevel gear shaft.

Technical Field

The invention relates to the technical field of gear hobbing machines, in particular to a rotary table arranged on a gear hobbing machine.

Background

The hobbing machine is one of the most widely used gear cutting machines, and can cut straight teeth, helical cylindrical gears, worm gears, chain wheels, etc. A gear processing machine for processing straight teeth, helical teeth, herringbone cylindrical gears and worm gears by a hob according to a generating method. When the machine tool uses a special hob, various workpieces with special tooth shapes such as a spline, a chain wheel and the like can be machined. The high-efficiency gear hobbing machine appeared in the 20 th century and the 60 s later mainly adopts a hard alloy hob as high-speed and large-feed-rate gear hobbing, and a hob main shaft usually adopts a hydrostatic bearing, so that oil mist can be automatically treated and chips can be automatically removed. Such a gear hobbing machine is suitable for mass production of gears. The large high-precision hobbing machine is mainly used for processing gears with high requirements on motion stability and service life, such as large high-precision high-speed gear pairs of a steam turbine, a ship propulsion device and the like. Generally, the development is matched with the development of the vertical type and the horizontal type. In addition to strict manufacturing and fine assembly and adjustment requirements, some gear hobbing machines also have a motion error detection device arranged on the hob spindle and the working table, and automatically feed back and compensate errors so as to improve the precision. In order to avoid the influence of internal and external heat sources on the gear hobbing machine, the temperatures of a hydraulic and cooling system are strictly controlled, and the gear hobbing machine must be arranged on a firm foundation in a constant-temperature factory and provided with a vibration-proof isolation groove. The small gear hobbing machine is used for processing instrument gears. The watch gear hobbing machine generally uses a hard alloy hob to machine a watch cycloid gear, the cycle beat is fast, the requirement on the reliability of a machine tool is high, and each machine tool is provided with an automatic feeding and discharging device to perform single-machine automatic machining. In addition, there are also a variety of gear hobbing machines for special purposes, such as indexing worm gear hobbing machines for machining high-precision worm gears.

When a tool rest of a rotary table of the existing gear hobbing machine is locked, the problem that the rotary table cannot be locked due to the clearance between a key and a key groove which is inherent in key transmission torque, the backlash of a motor and the inherent backlash of a traditional speed reducer can be caused.

Disclosure of Invention

In view of the above, the present invention provides a rotary table disposed on a gear hobbing machine, which solves the problem of the lock failure caused by the inherent key-key slot gap of the key transmission torque, the backlash of the motor itself, and the inherent backlash of the conventional speed reducer when the tool rest is locked.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a carousel of setting on gear hobbing machine, includes power unit, power unit passes through coupling mechanism with rotatory power transmission to main shaft, the main shaft is connected with the knife rest base, and then drives the knife rest base rotates in order to adjust the corner, still includes the gap eliminating device.

Further, the anti-backlash device comprises a tapered roller bearing arranged between the main shaft and the main shaft flange.

Further, the number of the tapered roller bearings is 4, and the tapered roller bearings are respectively arranged at two ends of the main shaft.

Further, the connecting mechanism comprises a taper gear shaft and a bevel gear which are meshed with each other, and the bevel gear is meshed with the main shaft.

Furthermore, an adjusting gasket is arranged between the taper gear shaft and the adjacent flange.

Further, the power mechanism comprises a motor and a harmonic reducer which are sequentially connected, and the harmonic reducer is connected with the taper gear shaft.

Furthermore, a gland is arranged between the harmonic reducer and the bevel gear shaft.

The invention has the beneficial effects that:

the invention utilizes the motor and the taper gear pair to drive the main shaft to rotate, further drives the tool rest to rotate by a fixed angle, and the tapered roller bearings are arranged at the two ends of the main shaft, thereby solving the problem that the tool rest can not be locked due to the clearance between the key and the key groove inherent in the key transmission torque, the backlash of the motor and the backlash inherent in the traditional speed reducer when being locked.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.

The invention provides a rotary table arranged on a gear hobbing machine, which is used for locking the corner and corner position of a tool rest of a numerical control gear hobbing machine, and the specific structure of the rotary table is shown in figure 1, and the rotary table comprises a main shaft 1, a gasket 2, a tool rest 3, a bevel gear 4, a taper gear shaft 5, a cylindrical roller bearing 6, an angular contact ball bearing 7, a lock nut 8, a key 9, a tensioning sleeve 10, a gland 11, a harmonic reducer 12, a motor 13, a flange 14, a flange 15, a shaft sleeve 16, an adjusting gasket 17, a main shaft flange 18, a ring 19, a sliding plate 20, a U-shaped seal 21, a tapered roller bearing 22 and a tapered roller bearing 23.

The motor 13 is connected with the harmonic reducer 12 to form a power mechanism for providing original rotating power, and a gland 11 is arranged between the harmonic reducer and the bevel gear shaft, namely, the gland 11 is connected with the bevel gear shaft 5.

The bevel gear 4 meshes with the bevel gear portion of the taper gear shaft 5 to drive the bevel gear 4 to rotate, the top end of the bevel gear 4 is provided with a main shaft 1, the surface of the main shaft 1 is provided with teeth matched with the bevel gear 4, and when the bevel gear 4 rotates, the main shaft 1 is driven to rotate.

One end of the main shaft 1 is connected with the tool rest 3, so that the main shaft 1 can drive the tool rest 3 to rotate, the tool rest 3 rotates by a fixed angle, the taper gear shaft 5 can be axially adjusted through the adjusting gasket 17 to achieve clearance elimination, and the adjusting gasket 17 is arranged between the taper gear shaft 5 and the connecting disc 15.

4 tapered roller bearings 22 and tapered roller bearings 23 are arranged between the main shaft 1 and the main shaft flange 18, and the number of the tapered roller bearings 22 and the number of the tapered roller bearings 23 are two respectively and are respectively arranged at two ends of the main shaft 1.

The tapered roller bearing is provided with a play within which the main shaft 1 can move axially when the main shaft 1 is axially moved.

The embodiment of the invention is as follows: during operation motor 13 transmits the moment of torsion for the harmonic speed reducer 12 input of big reduction ratio, the moment of torsion of harmonic speed reducer 12 output passes through key 9 and transmits for tapering gear shaft 5, rethread bevel gear 4 motion drives main shaft 1 and knife rest 3 and rotates, but tapering gear shaft 5 passes through adjusting shim 17 axial adjustment in order to realize the gap that disappears, when knife rest 3 rotates to the demand angle, the motor brakes, and drive main shaft 1 at tapered roller bearing 22 through hydraulic cylinder pressure, 23 play within range axial displacement, make the base of knife rest 3 and slide contact surface tightly laminate (there is the plastic between the base of knife rest 3 and the slide contact surface to paste), increase pressure increases frictional force, make knife rest 3 keep not rotating in the angular position department of demand. When the tool rest 3 is required to rotate, the pressure of the hydraulic oil cylinder is released, the tapered roller bearings 22 and 23 are reset axially, and the tool rest 3 can rotate.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.