CN210649500U

CN210649500U - High-precision high-rigidity turntable mechanism

Info

Publication number: CN210649500U
Application number: CN201921492454.XU
Authority: CN
Inventors: 李樟; 杨灿辉; 何顺围; 孙蔚
Original assignee: Chongqing Machine Tool Group Co Ltd
Current assignee: Chongqing Machine Tool Group Co Ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2020-06-02
Anticipated expiration: 2029-09-09

Abstract

The utility model belongs to the technical field of machine tool turntables, and relates to a high-precision high-rigidity turntable mechanism, a driving shaft meshed with a gearwheel is arranged in a turntable shell above the gearwheel, the turntable is driven to rotate by the rotation of the driving shaft, a pinion meshed with the gearwheel is arranged in a turntable shell below the gearwheel, a hydraulic motor arranged on a rotating shaft of the pinion generates an acting force opposite to the rotating shaft, a small shaft is fixedly arranged in the middle of a rotating mandrel fixedly arranged in the middle of the turntable, conical roller bearings are respectively sleeved at two ends of the rotating mandrel, a connecting part of the turntable and the gearwheel is a connecting disc, four groups of waist-shaped oil cylinders are fixedly arranged in the circumferential direction of the connecting disc, elastic pressing sheets are arranged on waist-shaped pistons of the four groups of waist-shaped oil cylinders, the elastic pressing sheets are contacted with plastic-sticking surfaces at the left, the problem of current lathe carousel mechanism can't satisfy the work piece to high rigidity, high accuracy performance demand is solved.

Description

High-precision high-rigidity turntable mechanism

Technical Field

The utility model belongs to the technical field of the lathe carousel, a high rigidity carousel mechanism of high accuracy is related to.

Background

At present, a conventional numerical control machine tool usually adopts a common servo motor to perform multi-pole speed reduction and then drives a turntable mechanism to perform rotary motion through worm gear and worm transmission. Because of a series of mechanical transmission and connection, mechanical abrasion is caused certainly, and various defects such as reverse clearance, elastic deformation, poor rigidity under large load and the like exist, so that the requirements of the high-rigidity and high-precision performance of the high-rigidity and high-precision hydraulic cylinder cannot be met.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses a solve the problem that current lathe carousel mechanism can't satisfy the work piece to high rigidity, high accuracy performance demand, provide a high rigidity carousel mechanism of high accuracy.

In order to achieve the above object, the present invention provides a high-precision high-rigidity turntable mechanism, comprising a turntable, a large gear sleeved outside the turntable, and a turntable housing, wherein a driving shaft engaged with the large gear is installed in the turntable housing above the large gear, the turntable is driven to rotate by the rotation of the driving shaft, a small gear engaged with the large gear is installed in the turntable housing below the large gear, a hydraulic motor is installed on a rotating shaft of the small gear, the hydraulic motor generates an acting force opposite to the rotating shaft, a rotating mandrel is fixedly installed in the middle of the turntable, a small shaft is fixedly installed in the middle of the rotating mandrel, tapered roller bearings are respectively sleeved at two ends of the rotating mandrel, a connecting disc is arranged at the joint of the turntable and the large gear, four groups of waist-shaped oil cylinders are fixedly installed in the circumferential direction of the connecting disc, an elastic pressing sheet is installed, the plastic-faced surface on the right side of the big gear wheel is contacted with the turntable shell to achieve a locking state.

Furthermore, an encoder is installed on a small shaft of the rotating mandrel, so that the full-closed-loop control of the rotary table is realized.

Furthermore, the four waist-shaped oil cylinders are centrosymmetric.

The beneficial effects of the utility model reside in that:

1. the utility model discloses a high rigidity carousel mechanism of high accuracy adopts the process of moulding through pasting in the left and right sides position at the gear wheel, can play wear-resisting effect on the one hand, avoids the carousel steel part to cause the damage with the friction of gear wheel steel part when rotating, thereby on the other hand lets the carousel also can make gear wheel and carousel casing contact increase the whole rotation rigidity of carousel when rotating. And two groups of high-rigidity tapered roller bearings are respectively arranged on two sides of the rotating mandrel, so that the rotating rigidity of the turntable is further ensured.

2. The utility model discloses a high rigidity carousel mechanism of high accuracy, thereby it rotates to drive the carousel mesa through driving shaft and gear wheel engagement in the carousel rotation, adopt pinion and gear wheel meshing simultaneously in the high accuracy keeps, hydraulic motor produces a reaction force drive pinion, make the pinion laminate with another flank of tooth of gear wheel (for driving shaft and gear wheel engagement's flank of tooth) all the time, and have certain thrust, thereby reach driving shaft and gear wheel engagement flank of tooth and laminate all the time, thereby eliminate the clearance of driving shaft and gear wheel. Meanwhile, the structure that the encoders are arranged on the rotating mandrel and the small shaft enables the turntable to realize full closed-loop control, and finally the requirement of high precision is met.

3. The utility model discloses a high rigidity carousel mechanism of high accuracy lets the carousel reach the high rigid performance of high accuracy through technologies such as waist type locking hydro-cylinder, subsides mould technology, hydraulic motor and full cut-off ring control, has apparent improvement to the whole precision of lathe.

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/or combinations particularly pointed out in the appended claims.

Drawings

For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of the high-precision and high-rigidity turntable mechanism of the present invention;

fig. 2 is the utility model discloses the installation schematic diagram of waist type hydro-cylinder in high accuracy high rigidity carousel mechanism.

Reference numerals: the device comprises a rotary table shell 1, a driving shaft 2, a large gear 3, a kidney-shaped piston 4, an elastic pressing sheet 5, a connecting disc 6, a first tapered roller bearing 7, a second tapered roller bearing 8, a small shaft 10, a rotating core shaft 11, a rotary table 12, a small gear 13 and a hydraulic motor 14.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

The high-precision high-rigidity turntable mechanism shown in fig. 1-2 comprises a turntable 12, a large gear 3 fixedly sleeved outside the turntable 12 and a turntable shell 1 which is meshed outside the large gear 3 in a relative rotation manner.

A driving shaft 2 meshed with the big gear 3 is arranged in a turntable shell 1 above the big gear 3, a turntable 12 is driven to rotate by the rotation of the driving shaft 2, a pinion 13 meshed with the big gear 3 is arranged in the turntable shell 1 below the big gear 3, a hydraulic motor 14 is arranged on a rotating shaft of the pinion 13, the hydraulic motor 14 generates an acting force opposite to the rotating shaft, the table top of the turntable 12 is driven to rotate by the meshing of the driving shaft 2 and the big gear 3 in the rotation of the turntable 12, the pinion 13 and the big gear 3 are simultaneously meshed in high-precision maintenance, the hydraulic motor 14 generates a reaction force to drive the pinion 13, so that the pinion 13 is always attached to the other tooth surface of the big gear 3 (relative to the tooth surface where the driving shaft 2 is meshed with the big gear 3) and has certain thrust, and the tooth surfaces where, thereby eliminating the gap between the driving shaft 2 and the large gear 3.

The middle part fixed mounting of carousel 12 has rotation dabber 11, and the middle part fixed mounting of rotation dabber 11 has staff 10, all installs the encoder on rotation dabber 11 and the staff 10, through the structure of installing an encoder on rotation dabber 11 and staff 10, makes carousel 12 realize full closed-loop control, finally reaches the requirement of high accuracy. Tapered roller bearings are respectively sleeved at two ends of the rotating mandrel 11, a first tapered roller bearing 7 is arranged on the left side, and a second tapered roller bearing 8 is arranged on the right side. The joint of the rotary table 12 and the large gear 3 is a connecting disc 6, four groups of waist-shaped oil cylinders are fixedly arranged in the circumferential direction of the connecting disc 6, and the four waist-shaped oil cylinders are centrosymmetric (I, II, III and IV in the figure 2 respectively). Elastic pressing sheets 5 are arranged on waist type pistons 4 of the four groups of waist type oil cylinders, the elastic pressing sheets 5 are contacted with plastic-coated surfaces on the left sides (VI in figure 1) of the corresponding large gears 3, and plastic-coated surfaces on the right sides (V in figure 1) of the large gears 3 are contacted with the turntable shell 1 to achieve a locking state. By adopting the plastic sticking process at the left side and the right side of the big gear 3, on one hand, the wear-resisting effect can be achieved, the damage caused by the friction between the steel part of the rotary disc 12 and the steel part of the big gear 3 when the rotary disc 12 rotates is avoided, and on the other hand, the rotary disc 12 can also enable the big gear 3 to contact with the rotary disc shell 1 when the rotary disc 12 rotates, so that the whole rotation rigidity of the rotary disc 12 is increased. And two groups of high-rigidity tapered roller bearings are respectively arranged on two sides of the rotating mandrel 11, so that the rotating rigidity of the turntable 12 is further ensured.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to 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 scope of the claims of the present invention.

Claims

1. A high-precision high-rigidity turntable mechanism is characterized by comprising a turntable, a large gear and a turntable shell, wherein the large gear and the turntable shell are sleeved outside the turntable, a driving shaft meshed with the large gear is installed in the turntable shell above the large gear, the turntable is driven to rotate by the rotation of the driving shaft, a small gear meshed with the large gear is installed in the turntable shell below the large gear, a hydraulic motor is installed on a rotating shaft of the small gear, the hydraulic motor generates an acting force opposite to the rotating shaft, a rotating mandrel is fixedly installed in the middle of the turntable, a small shaft is fixedly installed in the middle of the rotating mandrel, two ends of the rotating mandrel are respectively sleeved with a conical roller bearing, a connecting disc is arranged at the joint of the turntable and the large gear, four groups of waist-shaped oil cylinders are fixedly installed in the circumferential direction of the connecting disc, elastic pressing, the plastic-faced surface on the right side of the big gear wheel is contacted with the turntable shell to achieve a locking state.

2. The high-precision high-rigidity turntable mechanism according to claim 1, wherein encoders are mounted on the rotating mandrel and the small shaft, so that the turntable can realize full closed-loop control.

3. The high-precision high-rigidity turntable mechanism according to claim 2, wherein the four waist-shaped oil cylinders are centrosymmetric.