阅读说明：本技术 一种大负载高精度的单轴转台 (Heavy-load high-precision single-shaft rotary table ) 是由 江海滨 喻杰勇 余沛 贾军 于 2021-07-30 设计创作，主要内容包括：一种大负载高精度的单轴转台,包括台面,所述台面下端设有大底座,大底座内侧设有小底座,所述大底座上端经大四点接触球转盘轴承与台面连接,所述小底座经小四点接触球转盘轴承与台面连接,所述小底座上经减速机座固定安装有减速机,减速机的输入端连接有伺服电机,减速机的输出端连接有主动轮,所述小四点接触球转盘轴承包括小轴承内圈和外侧壁上设有齿轮的小轴承外圈,所述小轴承内圈与小底座固定连接,所述小轴承外圈与台面固定连接,小轴承外圈还与主动轮啮合连接,所述大底座的外侧经液压电动缸座固定安装有液压电动缸。本发明具有台面直径大、承载能力强、运输方便和环境适应性强的特点。(The utility model provides a unipolar revolving stage of heavy load high accuracy, includes the mesa, the mesa lower extreme is equipped with big base, and big base inboard is equipped with little base, big base upper end is connected with the mesa through big four-point contact ball slewing bearing, little base is connected with the mesa through little four-point contact ball slewing bearing, through speed reducer frame fixed mounting on the little base, the input of speed reducer is connected with servo motor, and the output of speed reducer is connected with the action wheel, little four-point contact ball slewing bearing includes the little bearing inner race that is equipped with the gear on little bearing inner race and the lateral wall, little bearing inner race and little base fixed connection, little bearing inner race and mesa fixed connection, little bearing outer race still are connected with the action wheel meshing, the outside of big base has the electronic jar of hydraulic pressure through electronic jar seat fixed mounting. The invention has the characteristics of large diameter of the table top, strong bearing capacity, convenient transportation and strong environmental adaptability.)

1. The utility model provides a unipolar revolving stage of heavy load high accuracy, includes mesa (1), its characterized in that, mesa (1) lower extreme is equipped with big base (12), and big base (12) inboard is equipped with little base (14), big base (12) upper end is connected with mesa (1) through big four-point contact ball slewing bearing (6), little base (14) are connected with mesa (1) through little four-point contact ball slewing bearing (5), there is speed reducer (9) on little base (14) through speed reducer frame (11) fixed mounting, and the input of speed reducer (9) is connected with servo motor (10), and the output of speed reducer (9) is connected with action wheel (7), little four-point contact ball slewing bearing (5) are equipped with the little bearing outer lane (52) of gear on little bearing inner circle (51) and the lateral wall, little bearing inner circle (51) and little base (14) fixed connection, the small bearing outer ring (52) is fixedly connected with the table board (1), the small bearing outer ring (52) is further meshed with the driving wheel (7), and the hydraulic electric cylinder (16) is fixedly mounted on the outer side of the large base (12) through the hydraulic electric cylinder seat (17).

2. A heavy-load high-precision single-shaft rotary table according to claim 1, characterized in that the small base (14) is made by integral casting, the large base (12) is formed by sequentially splicing 8 base skeletons (13) end to end through screws, and the inner side of the large base (12) is connected with the small base (14).

3. A heavy-load high-precision single-shaft turntable according to claim 1, characterized in that the large four-point contact ball turntable bearing (6) comprises a large bearing outer ring (62) and a large bearing inner ring (61), the large bearing outer ring (62) is fixedly connected with the large base (12), and the large bearing inner ring (61) is fixedly connected with the table top (1).

4. The heavy-load high-precision single-shaft rotary table according to claim 1 is characterized in that the table top (1) comprises 6 fan-shaped table top blocks (2), 1 circular table top block (3) and 6 table top frameworks (4), wherein the 6 table top frameworks (4) are sequentially spliced end to end through screws and then fixedly connected with a large four-point contact ball turntable bearing (6) and a small four-point contact ball turntable bearing (5), the 6 fan-shaped table top blocks (2) are correspondingly installed at the upper ends of the 6 table top frameworks (4) respectively, and the circular table top blocks (3) are connected with the 6 fan-shaped table top blocks (2) respectively to form a large circular table top block.

5. A heavy load high precision single axis turntable according to claim 1, characterized in that the lower ends of the large base (12) and the small base (14) are provided with adjusting sizing blocks (15).

Technical Field

The invention relates to a heavy-load high-precision single-shaft turntable.

Background

In recent years, with the continuous change of international forms and the more intense competition between countries, defense weapon systems have become the key field of competition among military and strong countries, especially some flight weapon systems with heavy load and strong attack capability have been paid high attention by military, and various military research units in China have been developed and have competitive bidding of related systems, and testing such weapon systems requires a single-shaft turntable with high precision requirement and high bearing capacity for testing and testing such fighter airplanes.

The traditional single-shaft turntable is mainly used for testing various performance parameters of a rate test of a series of liquid floating gyros at normal temperature and testing static parameters of other angular rate sensitive elements; the whole system is supported by a precision mechanical bearing, a direct-current torque motor is directly driven, a Haidenhain absolute grating is used as an angle measuring and feedback element, and the load weight is only dozens of kilograms generally.

Disclosure of Invention

The invention aims to provide a heavy-load high-precision single-shaft turntable so as to solve the problems in the background technology, and the turntable has the characteristics of strong bearing capacity, small table-board deformation, long bearing service life and high rotation precision.

The technical proposal adopted for realizing the purpose is that the single-shaft turntable with large load and high precision comprises a table top, the lower end of the table-board is provided with a large base, the inner side of the large base is provided with a small base, the upper end of the large base is connected with the table-board through a large four-point contact ball turntable bearing, the small base is connected with the table-board through a small four-point contact ball turntable bearing, a speed reducer is fixedly arranged on the small base through a speed reducer base, the input end of the speed reducer is connected with a servo motor, the output end of the speed reducer is connected with a driving wheel, the small four-point contact ball turntable bearing comprises a small bearing inner ring and a small bearing outer ring with a gear on the outer side wall, the small bearing inner ring is fixedly connected with the small base, the small bearing outer ring is fixedly connected with the table board, the small bearing outer ring is further meshed with the driving wheel, and the hydraulic electric cylinder is fixedly mounted on the outer side of the large base through the hydraulic electric cylinder seat.

Further, little base adopts the integral type casting to make, big base passes through the screw by 8 base skeletons and constitutes end to end concatenation in proper order, and the inboard and the little base of big base are connected.

The heavy-load high-precision single-shaft rotary table according to claim 1, wherein the large four-point contact ball rotary table bearing comprises a large bearing outer ring and a large bearing inner ring, the large bearing outer ring is fixedly connected with a large base, and the large bearing inner ring is fixedly connected with the table top.

Further, the mesa including 6 fan-shaped mesa pieces, 1 circular mesa piece and 6 mesa skeletons, 6 the mesa skeleton pass through the screw in proper order after the head and the tail concatenation with big four point contact ball slewing bearing, little four point contact ball slewing bearing fixed connection, 6 fan-shaped mesa piece corresponds the upper end of installing at 6 mesa skeletons respectively, circular mesa piece respectively with 6 fan-shaped mesa piece is connected and is constituted a big circular mesa piece.

Furthermore, the lower end of the big base is provided with an adjusting sizing block.

Advantageous effects

Compared with the prior art, the invention has the following advantages.

1. The invention effectively solves the defects of weak bearing capacity and poor environmental adaptability of the existing single-shaft rotary table;

2. the invention adopts a double indirect driving mode to drive the load, the driving torque is large, the hydraulic electric cylinder is adopted to support the eccentric torque generated when the load just enters the table top, and the table top and the base adopt a split structure, thereby breaking through the bottleneck of the prior art;

3. the invention has the advantages of convenient, flexible and quick operation and effectively realizes the function of carrying a large load for testing.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

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

fig. 2 is a structural sectional view of the present invention.

Detailed Description

The invention is further described with reference to the following examples and the accompanying drawings.

As shown in fig. 1 and 2, the single-shaft turntable with large load and high precision comprises a table top 1, wherein a large base 12 is arranged at the lower end of the table top 1, a small base 14 is arranged at the inner side of the large base 12, the upper end of the big base 12 is connected with the table-board 1 through a big four-point contact ball turntable bearing 6, the small base 14 is connected with the table-board 1 through a small four-point contact ball turntable bearing 5, a speed reducer 9 is fixedly arranged on the small base 14 through a speed reducer base 11, the input end of the speed reducer 9 is connected with a servo motor 10, the output end of the speed reducer 9 is connected with a driving wheel 7, the small four-point contact ball turntable bearing 5 comprises a small bearing inner ring 51 and a small bearing outer ring 52 with a gear on the outer side wall, the small bearing inner ring 51 is fixedly connected with the small base 14, the small bearing outer ring 52 is fixedly connected with the table top 1, the small bearing outer ring 52 is also meshed with the driving wheel 7, and a hydraulic electric cylinder 16 is fixedly arranged on the outer side of the large base 12 through a hydraulic electric cylinder seat 17.

The small base 14 is made by integral casting, the large base 12 is formed by sequentially splicing 8 base frameworks 13 end to end through screws, and the inner side of the large base 12 is connected with the small base 14.

The large four-point contact ball turntable bearing 6 comprises a large bearing outer ring 62 and a large bearing inner ring 61, the large bearing outer ring 62 is fixedly connected with the large base 12, and the large bearing inner ring 61 is fixedly connected with the table top 1.

Mesa 1 is including 6 fan-shaped mesa pieces 2, 1 circular mesa piece 3 and 6 mesa skeleton 4, 6 mesa skeleton 4 through the screw in proper order after the head and the tail concatenation with big four point contact ball slewing bearing 6, little four point contact ball slewing bearing 5 fixed connection, 6 fan-shaped mesa piece 2 corresponds respectively and installs the upper end at 6 mesa skeleton 4, circular mesa piece 3 respectively with 6 fan-shaped mesa piece 2 is connected and is constituted a big circular mesa piece.

The lower ends of the large base 12 and the small base 14 are both provided with an adjusting sizing block 15.

In the invention, a small bearing outer ring 52 of the small four-point contact ball turntable bearing 5 is used as a rotor, the outer side wall of the small bearing outer ring is provided with gears, the small bearing outer ring is used as a driven wheel in a turntable driving system, the turntable driving system comprises two sets, and a single set of turntable driving system mainly comprises a servo motor 10, a speed reducer 9, a driving wheel 7 and the driven wheel; the table top 1 adopts a split design and consists of 6 fan-shaped table top blocks 2, 1 circular table top block 3 and 6 table top frameworks 4, and all the parts are connected through screws; the structure is similar to the structure of the table top 1, the large base 12 also adopts a split structure, and the large base 12 is formed by connecting 8 base frameworks 13; the hydraulic electric cylinder 16 is used as an auxiliary support, the hydraulic electric cylinder 16 is placed on one side of the table top 1 where the load initially enters, the hydraulic electric cylinder 16 is electrified before the load enters the table top 1 to support the table top 1, and after the load enters the table top 1, the hydraulic electric cylinder 16 is electrified to prepare for load testing; the lower end of the table body 1 is respectively provided with a large base 12 and a small base 14, the large base 12 is used for installing a large four-point contact ball turntable bearing 6, the small base 14 is used for installing a small four-point contact ball turntable bearing 5, and the table surface 1 is simultaneously connected with the large four-point contact ball turntable bearing 6 and the small four-point contact ball turntable bearing 5.

The working principle of the invention is as follows: the rotary table is convenient for a user to directly drive the load into the table top 1, and the whole table body is placed in a pre-designed foundation, so that the table top 1 is flush with the ground; the small four-point contact ball turntable bearing 5 has a transmission function besides bearing, a small bearing outer ring 52 of the small four-point contact ball turntable bearing 5 is provided with a gear, and the small bearing outer ring 52 is used as a driven wheel driven by a shafting; the driving wheel 7 and the speed reducer 9 are connected with a servo motor 10, and a driving system of a shaft system is formed by the servo motor 10, the speed reducer 9, the driving wheel 7 and a driven wheel; when the servo motor 10 works, the bearing is driven to work; the large four-point contact ball turntable bearing 6 and the small four-point contact ball turntable bearing 5 are concentrically arranged, so that the turntable has large bearing capacity and high mechanical precision, and the turntable is ensured to have the characteristics of strong bearing capacity, small table surface deformation, long bearing service life and high rotation precision;

the user load drives into the initial position of the table board 1, the edge of the table board 1 is considered to be in a cantilever state, and the hydraulic electric cylinder 16 is designed to support the table board 1, so that the table board 1 is prevented from being damaged by excessive local deformation, damage to the bearing due to the action of large overturning moment and the like. When a user needs to load a load test, the hydraulic electric cylinder 16 is controlled to support the table board 1, and after the load reaches the final position of the table board 1, the force of the hydraulic electric cylinder 16 is removed to complete the separation of the hydraulic electric cylinder 16 and the table board 1; when the load needs to be removed from the table top 1, the hydraulic electric cylinder 16 is electrified, and the hydraulic electric cylinder 16 works normally to play a supporting role; the table top 1 is composed of a fan-shaped table top block 2, a circular table top block 3 and a table top framework 4, each part is precisely machined to the required precision, then is connected to the table top framework 4 through screws, and then is subjected to scraping process and table top repairing and grinding to meet the flatness requirement; the large base 12 is used for supporting the large four-point contact ball turntable bearing 6, the fact that the large base 12 is large in outer diameter is considered, transportation, processing and manufacturing of the part are inconvenient in practice, the large base 12 is formed by splicing 8 base frameworks 13, and all the parts are connected through screws.

When the machine is implemented specifically, 6 fan-shaped table top blocks 2 are processed to the size, then 6 table top frameworks 4 are spliced together through screws, the processed 6 fan-shaped table top blocks 2 are installed on the spliced table top frameworks 4 through circular table top blocks 3 to be assembled into a table top 1, and the accuracy of the table top 1 is finished to the requirement through grinding; 8 base frameworks 13 are connected together through screws to form an integral large base 12; the small base 14 is formed by integral casting, and then the large base 12 and the small base 14 are connected together; a small four-point contact ball turntable bearing 5 and a large four-point contact ball turntable bearing 6 are respectively arranged on the small base 14 and the large base 12, and the table board 1 is fixed on the large four-point contact ball turntable bearing 6 and the small four-point contact ball turntable bearing 5;

the speed reducer base 11 is arranged on the integrally cast small base 14, and the speed reducer 9 is arranged on the speed reducer base 11; the output end of the speed reducer 9 is provided with a driving wheel 7, and the driving wheel 7 and the small bearing outer ring 52 jointly form a transmission gear pair of the large-load high-precision single-shaft turntable; the input end of the speed reducer 9 is provided with a servo motor 10; the large-load high-precision single-shaft turntable transmission system is formed by a servo motor 10, a transmission gear pair and a speed reducer 9; another set of drive systems was assembled in the same order as above.

A hydraulic electric cylinder seat 17 is placed on one side of a load driving-in table board 1, and a hydraulic electric cylinder 16 is placed in the hydraulic electric cylinder seat 17 to play a role of bearing load eccentric moment; 16 adjusting sizing blocks are respectively arranged below the large base 12 and the small base 14.

The load drives into the table board 1 by arranging one side of the hydraulic electric cylinder 16, the hydraulic electric cylinder 16 is powered on, the hydraulic electric cylinder 16 supports the table board 1, after the hydraulic electric cylinder 16 drives into the center of the table board 1, the hydraulic electric cylinder 16 is powered off, the descending of the hydraulic electric cylinder 16 is completed, the rotation freedom degree of the table board 1 is released, the servo motor 10 is powered on, the speed reducer 9 of the servo motor 10 moves, the speed reducer 9 drives the driving wheel 7 to move, the driving wheel 7 drives the small bearing outer ring 52 to move, the small bearing outer ring 52 is a rotor of the small four-point contact ball turntable bearing 5, and the high-precision test of the large load is completed through precise servo closed-loop control.

When transportation is needed, the table top 1 is divided into 6 fan-shaped table top blocks 2, circular table top blocks 3 and 6 table top frameworks 4, the large base 12 is divided into 8 large base frameworks 13, the small four-point contact ball turntable bearing 5 and the large four-point contact ball turntable bearing 6 are also independently packaged, screws connected with the small base on the speed reducer base 11 are loosened, the two sets of driving systems are respectively dismounted, then all the parts are respectively loaded, and the portable transportation of the large-load high-precision single-shaft turntable is completed; and after the assembly is finished, the assembly of the heavy-load high-precision single-shaft rotary table is finished according to the steps of the previous embodiment.