CN216180371U

CN216180371U - Liftable single-shaft rotary table

Info

Publication number: CN216180371U
Application number: CN202122594674.7U
Authority: CN
Inventors: 余沛; 喻杰勇; 张旭明; 唐先林
Original assignee: Jiujiang Precision Measuring Technology Research Institute
Current assignee: Jiujiang Precision Measuring Technology Research Institute
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-04-05
Anticipated expiration: 2031-10-27

Abstract

The utility model discloses a lifting single-shaft turntable which comprises a lifting frame, wherein a guide rail and a lead screw are installed on the lifting frame, a grating ruler is arranged on one side of the guide rail, limit blocks are arranged at the upper end and the lower end of the guide rail, a sliding block is matched on the guide rail, a lifting adapter plate is connected on the sliding block and is connected with the lead screw through a lifting support, a reading head is installed on the lifting adapter plate, the upper end of the lead screw is connected with a lifting servo motor through a lifting speed reducer, a lifting platform table top connected with the lifting adapter plate is arranged in the lifting frame, a single-shaft turntable is installed at the upper end of the lifting platform table top, and a camera is installed at the upper end of the single-shaft turntable. The utility model has the characteristics of simple, convenient, flexible and quick operation.

Description

Liftable single-shaft rotary table

Technical Field

The utility model relates to a liftable single-shaft rotary table, in particular to a high-precision miniaturized single-shaft rotary table with a lifting function.

Background

The single-shaft turntable is very widely applied and is common in the field of inertia test and the field of optics. In the field of inertia test, a single-shaft turntable is required to have higher angular position accuracy, angular rate accuracy and smoothness, and the influence of inhibiting certain factors on the control performance index of the turntable must be considered in the design, such as: mechanical mounting errors, electromagnetic interference, etc. However, in the optical field there are other special requirements for the turret, such as: the positioning precision stability is good, the rotary table needs to be small, the rotary table needs to have a lifting function, and the rotary table can realize space two-dimensional scanning. The existing single-shaft rotary table is generally directly driven and controlled in a closed loop mode through a direct-current torque motor, but the rotary table which is directly driven is not beneficial to capturing targets in the optical field, the rotary table can slightly shake after being in place, and the load bearing capacity of the single-shaft rotary table which adopts a direct-drive structure is limited; the traditional mechanical structure is generally adopted for the existing single-shaft rotary table, two pairs of bearings are supported, the angle sensor is installed at the lower end of a shaft system, the table board is directly installed at the upper end of the main shaft, the appearance of the structure is large, the rotary table is heavy, and the carrying of rotary table equipment is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a liftable single-shaft rotary table, which effectively solves the problems that in the prior art, the shaft system structure is not compact, the appearance of the table body is too large, the carrying is inconvenient, the bearing capacity of the rotary table is limited, the rotary table cannot realize the integration of rotary motion and linear motion, and the camera focusing is influenced by the shake of the rotary table after the rotary table is in place.

The lifting uniaxial turntable comprises a lifting frame, wherein a guide rail and a lead screw are mounted on the lifting frame, a grating ruler is arranged on one side of the guide rail, limiting blocks are arranged at the upper end and the lower end of the guide rail, a sliding block is matched on the guide rail, a lifting adapter plate is connected onto the sliding block and is connected with the lead screw through a lifting support, a reading head is mounted on the lifting adapter plate, the upper end of the lead screw is connected with a lifting servo motor through a lifting speed reducer, a lifting platform table top connected with the lifting adapter plate is arranged in the lifting frame, a uniaxial turntable is mounted at the upper end of the lifting platform table top, and a camera is mounted at the upper end of the uniaxial turntable; the single-shaft rotary table comprises a base fixed on the table top of the lifting platform, a main shaft is arranged in the base, a rotary support is mounted on the main shaft, an angle measuring rotor seat connected with the rotary support is arranged at the upper end of the base, a driven wheel fixedly connected with the main shaft is arranged in the angle measuring rotor seat, a driving wheel is meshed with one side of the driven wheel, the driving wheel is connected with a single-shaft rotary table servo motor through a single-shaft rotary table speed reducer, the single-shaft rotary table speed reducer and the angle measuring rotor seat are rigidly connected, an angle sensor is further mounted on the main shaft and connected with the angle measuring rotor seat through an angle measuring rotor connecting plate, and a table top used for mounting a camera is arranged at the upper end of the angle measuring rotor seat.

Further, all install 2 guide rails on the both sides terminal surface around the lifting frame, 2 guide rails pass through the slider and are connected with the both ends of lift keysets, the lead screw is all installed to the left and right sides of lifting frame, installs the lifting support through screw pair structure on the lead screw, and the both ends of lifting support are connected with the one end of 2 lift keysets respectively.

Furthermore, the lower end of the lifting frame is respectively provided with a foundation bolt and a leveling sizing block.

Furthermore, the rotary support comprises a rotary support inner ring and a rotary support outer ring, the rotary support inner ring is fixedly connected with the main shaft, and the rotary support outer ring is fixedly connected with the angle measuring rotor seat.

Further, the angle sensor comprises an angle sensor stator and an angle sensor rotor, the angle sensor stator is fixedly connected with the main shaft, and the angle sensor rotor is fixedly connected with the angle measuring rotor base through the angle measuring rotor connecting plate.

Advantageous effects

Compared with the prior art, the utility model has the following advantages.

The utility model reasonably and effectively solves the defects of the prior art that the lifting function has a bottleneck, the positioning precision is low, the self is too heavy, the appearance of the rotary table is too large, and the bearing capacity is not strong;

the utility model realizes the integrated design of the lifting function and the rotation function, the lifting function adopts two sets of driving mechanisms and one driver for driving, the single-shaft turntable adopts a non-traditional mechanical structure, the forward and reverse rotation principle is facilitated, the compact driving system and the rotation system are realized, and all functions of the traditional mechanical mechanism are completed;

the utility model has the characteristics of compact structure, simple operation, convenience, flexibility and quickness.

Drawings

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

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

FIG. 2 is a schematic structural view of the elevating platform of the present invention;

FIG. 3 is a structural sectional view of a single-axis turntable in the present invention;

fig. 4 is a schematic view of the structure of a single-axis turntable in the present invention.

Detailed Description

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

As shown in fig. 1-4, a liftable single-axis turntable comprises a lifting frame 1, wherein a guide rail 3 and a screw rod 2 are mounted on the lifting frame 1, a grating ruler 9 is arranged on one side of the guide rail 3, limiting blocks 6 are arranged at the upper end and the lower end of the guide rail 3, a slider 5 is matched on the guide rail 3, a lifting adapter plate 4 is connected on the slider 5, the lifting adapter plate 4 is connected with the screw rod 2 through a lifting support 26, a reading head 10 is mounted on the lifting adapter plate 4, the upper end of the screw rod 2 is connected with a lifting servo motor 13 through a lifting speed reducer 12, a lifting platform top 11 connected with the lifting adapter plate 4 is arranged in the lifting frame 1, a single-axis turntable 27 is mounted at the upper end of the lifting platform top 11, and a camera 25 is mounted at the upper end of the single-axis turntable 27; unipolar revolving stage 27 is equipped with main shaft 17 in the base 14 including fixing the base 14 on lift platform mesa 11, installs the gyration on the main shaft 17 and supports 16, base 14 upper end is equipped with the angle measurement rotor seat 15 of supporting 16 with the gyration, is equipped with in the angle measurement rotor seat 15 with main shaft 17 fixed connection from driving wheel 19, and it has the action wheel 18 to mesh from one side of driving wheel 19, action wheel 18 is connected with unipolar revolving stage servo motor 23 through unipolar revolving stage speed reducer 22, unipolar revolving stage speed reducer 22 and angle measurement rotor seat 15 rigid connection, still install angle sensor 21 on the main shaft 17, angle sensor 21 is connected with angle measurement rotor seat 15 through angle measurement rotor connecting plate 20, angle measurement rotor seat 15 upper end is equipped with the mesa 24 that is used for installing camera 25.

All install 2 guide rails 3 on the front and back both sides terminal surface of

lifting frame

1, 2 guide rails 3 are connected with the both ends of lift keysets 4 through slider 5, lead screw 2 is all installed to lifting frame 1's the left and right sides, installs lifting support 26 through screw thread pair structure on the lead screw 2, and lifting support 26's both ends are connected with the one end of 2 lift keysets 4 respectively.

The lower end of the lifting frame 1 is respectively provided with a foundation bolt 8 and a leveling sizing block 7.

The rotary support 16 comprises a rotary support inner ring and a rotary support outer ring, the rotary support inner ring is fixedly connected with the main shaft 17, and the rotary support outer ring is fixedly connected with the angle measuring rotor seat 15.

The angle sensor 21 comprises an angle sensor stator and an angle sensor rotor, the angle sensor stator is fixedly connected with the main shaft 17, and the angle sensor rotor is fixedly connected with the angle measuring rotor seat 15 through an angle measuring rotor connecting plate 20.

The lifting platform integrates the lifting function and the rotating function, and is formed by a lifting frame 1, a screw rod 2, a guide rail 3, a lifting adapter plate 4, a sliding block 5, a limiting block 6, a leveling sizing block 7, foundation bolts 8, a grating ruler 9, a reading head 10, a lifting platform table-board 11, a lifting speed reducer 12 and a lifting servo motor 13; the high-precision miniaturized single-axis turntable is formed by a base 14, an angle measuring rotor seat 15, a rotary support 16, a main shaft 17, a driving wheel 18, a driven wheel 19, an angle measuring rotor adapter plate 20, an angle sensor 21, a single-axis turntable speed reducer 22, a single-axis turntable servo motor 23 and a table top 24; the lifting platform is driven by two motors, 2 sets of

lifting servo motors

13 and 2 sets of lead screws 2 drive a lifting platform table board 11 to do linear motion, a grating ruler 9 is installed on one side, located on a guide rail 3, of a lifting frame 1 of the lifting platform, a reading head 10 is installed on a lifting adapter plate 4, and the lifting platform is controlled in a closed-loop mode; the single-shaft rotary table is mounted on a table top 11 of the lifting platform through screws and does linear lifting motion along with the linear motion of the lifting platform, and the single-shaft rotary table is driven indirectly and supported in a single-sleeve rotating mode.

The main shaft 17 is connected with the rotary support 16, the main shaft 17 is fixed, the inner ring of the rotary support is connected with the main shaft 17 to form a stator, and the outer ring of the rotary support is a rotor.

The driving system of the single-shaft turntable 27 adopts two-stage transmission, namely: the gear pair adds planetary reducer, and the gear pair contains action wheel 18 and driven wheel 19, passes through bolted connection from driven wheel 19 with main shaft 17, and when unipolar revolving stage servo motor 23 drive unipolar revolving stage speed reducer 22 and gear pair motion, from the meshing of action wheel 19 and action wheel 18, nevertheless follow, 19 do not move, action wheel 18 is around main shaft shafting rotary motion.

An angle encoder is arranged on a rotary table shaft system, the rotation control of the shaft system is closed-loop control, and the precision stability is good after the rotary table is in place.

The working principle of the utility model is that the lifting platform adopts 2

lifting servo motors

13, 2

lifting speed reducers

12, 2 sets of

screw rods

2 and 4 guide rails 3 to form 2 sets of driving systems, a single set of driving system is formed by connecting 1 lifting servo motor 13 with 1 lifting speed reducer 12 to increase the transmission torque, and 1 driver is adopted to simultaneously control the 2 sets of driving systems in order to ensure that the 2 sets of driving systems synchronously run;

the lifting platform adopts closed-loop control, the position feedback component comprises 1 set of

grating ruler

9 and 1 reading head 10, the positioning precision is +/-0.05 mm, and the motor has a self-locking function; the platform has a large stroke, the maximum stroke can reach 850mm, a limiting block 6 is designed at the limit position, and the limiting block 6 can realize the limiting effect of the lifting platform in an out-of-control state;

a screw rod 2 and a guide rail 3 in a lifting platform are both arranged on a lifting frame 1, the bottom of the lifting frame 1 is provided with 4 sets of foundation bolts 8, the rotary table is connected with a foundation through the

foundation bolts

8, 4 sets of leveling sizing blocks 7 are arranged below the lifting frame 1, and the leveling of the rotary table is realized through the leveling sizing blocks 7;

the single-shaft rotary table 27 is arranged on the table top 11 of the lifting platform, and the single-shaft rotary table 27 mainly comprises a driving system and a rotary shaft system; the driving system adopts indirect driving and two-stage transmission, namely gear pair transmission and planetary reducer transmission, the rotary support adopts a turntable bearing support, the single-shaft turntable also comprises an angle measuring sensor 21 and adopts closed-loop control, and the single-shaft turntable has high positioning precision, good stability and compact structure after being in place;

the camera 25 is installed on the table 24, and when the camera 25 receives a motion command, the single-axis turntable can realize linear and rotary motion, complete the target capture of the camera, and perform focusing and shooting.

The lifting platform comprises a

lifting frame

1, 4 guide rails 3, a set of lead screws 2, a set of guide rods 2, a set of guide blocks 5 and a set of lifting adapter plate 4, wherein the guide rails 3 are arranged on 4 stand columns of the lifting frame 1, the effective stroke of the lead screws and the guide rails 3 is larger than 850mm; 1 set of grating ruler 9 is arranged on the upright column, and a reading head 10 is arranged on the lifting adapter plate 4; the bottom of the lifting frame 1 is provided with 4 sets of

foundation bolts

8 and 4 sets of leveling sizing blocks 7;

the base 14 is connected with the lifting platform surface 11 through screws; a main shaft 17 is arranged on the base 14, a rotary support 16 is connected to the main shaft 17, an outer ring of the rotary support is connected with an angle measuring rotor seat 15, an inner ring of the rotary support is connected with the main shaft 17, and the angle measuring rotor seat 15 rotates along with the outer ring of the rotary support; the driven wheel 19 is arranged on the main shaft 17, the single-shaft rotary table speed reducer 22 is rigidly connected with the angle measuring rotor seat 15, the driving wheel 18 is arranged at the input end of the single-shaft rotary table speed reducer 22, and the output end of the single-shaft rotary table speed reducer 22 is provided with the single-shaft rotary table servo motor 23;

the angle sensor 21 is arranged at the top end of the main shaft 17, the angle sensor rotor is connected with the angle measuring rotor seat 15, the angle sensor stator is connected with the main shaft 17, the table top 24 is arranged at the upper part of the angle measuring rotor seat 15, and the camera 25 is arranged on the table top 24.

When the lifting device is specifically implemented, a lifting frame 1 is placed on a flat ground, a screw rod 2 and a guide rail 3 are sequentially installed by using screws, a sliding block 5 is installed on the guide rail 3, the sliding block 5 is rigidly connected with a lifting adapter plate 4, a limiting block 6 and a grating ruler 9 are installed on the lifting frame 1, a reading head 10 is installed on the lifting adapter plate 4, a lifting platform table 11 is connected with the lifting adapter plate 4, a lifting speed reducer 12 is installed at the shaft end of the screw rod 2, and a lifting servo motor 13 is connected with the input end of the lifting speed reducer 12; the leveling sizing block 7 is placed at the bottom of the lifting frame 1, and the lifting frame 1 is fixed with a foundation through foundation bolts 8.

The method comprises the following steps of placing a base 14 stably, installing a main shaft 17 on the base 14, and then sequentially installing a rotary support 16, a driven wheel 19, an angle measuring rotor connecting plate 20, an angle sensor 21, a driving wheel 18, a single-shaft rotary table speed reducer 22, a single-shaft rotary table servo motor 23 and a table top 24; the connected single-shaft rotary table 27 is integrally conveyed to the lifting platform table 11 and fixed through screws. The camera 25 is then mounted on a single axis turntable 27.

The lifting platform servo motor 13 receives a user instruction and drives the lifting platform speed reducer 12 to rotate, the lifting platform speed reducer 12 drives the screw rod 2 to rotate, the rotation motion is converted into linear motion, the lifting adapter plate 4 drives the lifting platform table top 11 to linearly move on the guide rail 3 along with the sliding block 5, the 2 lifting platform servo motors 13 are driven by the same driver, and the speed is stable.

The single-axis rotary table servo motor 23 receives a user signal, the single-axis rotary table servo motor 23 starts to work, the driving wheel 18 rotates at the same speed along with the single-axis rotary table servo motor 23, the driving wheel 18 and the driven wheel 19 are meshed with each other, the driven wheel 19 is rigidly connected with the main shaft 17, the driving wheel 18 rotates around the axis of the main shaft, the angle sensor rotor moves along with the angle measuring rotor seat 15, and the table board 24 also moves along with the angle measuring rotor seat 15, so that the load camera 25 is driven to move.

The embodiment of the linear motion of the lifting platform and the rotary motion of the single-axis rotary table is repeated, the user instruction is received, the linear motion of the lifting platform and the rotary motion of the single-axis rotary table are completed simultaneously, and the scanning of the camera 25 in the two-dimensional space is realized.

Claims

1. A lifting single-shaft turntable comprises a lifting frame (1) and is characterized in that a guide rail (3) and a lead screw (2) are mounted on the lifting frame (1), a grating ruler (9) is arranged on one side of the guide rail (3), limit blocks (6) are arranged at the upper end and the lower end of the guide rail (3), a sliding block (5) is matched on the guide rail (3), a lifting adapter plate (4) is connected on the sliding block (5), the lifting adapter plate (4) is connected with the lead screw (2) through a lifting support (26), a reading head (10) is mounted on the lifting adapter plate (4), the upper end of the lead screw (2) is connected with a lifting servo motor (13) through a lifting speed reducer (12), a lifting platform surface (11) connected with the lifting adapter plate (4) is arranged in the lifting frame (1), and a turntable (27) is mounted at the upper end of the lifting platform surface (11), the upper end of the single-shaft rotary table (27) is provided with a camera (25); the single-shaft turntable (27) comprises a base (14) fixed on a table top (11) of the lifting platform, a main shaft (17) is arranged in the base (14), a rotary support (16) is arranged on the main shaft (17), an angle measuring rotor seat (15) connected with a rotary support (16) is arranged at the upper end of the base (14), a driven wheel (19) fixedly connected with a main shaft (17) is arranged in the angle measuring rotor seat (15), a driving wheel (18) is meshed with one side of the driven wheel (19), the driving wheel (18) is connected with a single-shaft turntable servo motor (23) through a single-shaft turntable speed reducer (22), the single-shaft turntable speed reducer (22) is rigidly connected with the angle measuring rotor seat (15), the main shaft (17) is also provided with an angle sensor (21), the angle sensor (21) is connected with an angle measuring rotor seat (15) through an angle measuring rotor connecting plate (20), the upper end of the angle measuring rotor seat (15) is provided with a table board (24) for mounting a camera (25).

2. The liftable single-shaft rotary table according to claim 1, wherein 2 guide rails (3) are respectively installed on the front and rear end faces of the lifting frame (1), the 2 guide rails (3) are connected with the two ends of the lifting adapter plate (4) through a slider (5), the screw rods (2) are respectively installed on the left and right sides of the lifting frame (1), the lifting support (26) is installed on the screw rods (2) through a thread pair structure, and the two ends of the lifting support (26) are respectively connected with one ends of the 2 lifting adapter plates (4).

3. A liftable single-shaft turntable according to claim 1, wherein the lower end of the lifting frame (1) is provided with anchor bolts (8) and leveling pads (7), respectively.

4. A liftable single-shaft rotary table according to claim 1, wherein the rotary support (16) comprises a rotary support inner ring and a rotary support outer ring, the rotary support inner ring is fixedly connected with the main shaft (17), and the rotary support outer ring is fixedly connected with the angle measuring rotor base (15).

5. A liftable single-axis turntable according to claim 1, wherein the angle sensor (21) comprises an angle sensor stator and an angle sensor rotor, the angle sensor stator is fixedly connected with the main shaft (17), and the angle sensor rotor is fixedly connected with the angle measuring rotor base (15) through an angle measuring rotor connecting plate (20).