CN103969845A - Multi-foot heavy-load air-floating supporting device for optical installation and calibration - Google Patents

Abstract

A multi-legged heavy-duty air-floating support device for optical installation and calibration belongs to the field of macro-distance displacement devices for ground installation and calibration of large-scale precision optical equipment. Bearing plate and three air bearing assemblies. The device evenly shares the load-bearing pressure transmitted by the ball stud of the bearing arm through three small air bearing blocks with the same bottom surface, so that the stress on the main load-bearing plate can be evenly dispersed, so the small air bearing is fully utilized. The floating block has the advantages of short processing cycle, easy production and low cost, and overcomes the shortcoming of a single small air floating block with limited carrying capacity. The distribution of the three small air bearing blocks makes full use of the stability of the three-point fixed surface. At the same time, the use of multiple ball-and-socket structures also utilizes the principle of spherical centering, making the mechanical transmission path of the entire heavy-duty air bearing support device accurate. , stable, and can fully meet the ground installation and calibration requirements of space optical remote sensors.

Description

Heavy-duty air-floating support device for multi-legged optical assembly

technical field

The invention belongs to the field of macro-distance displacement devices for ground installation and calibration of large-scale precision optical equipment, and specifically relates to a multi-legged heavy-duty air-floating support device for optical installation and calibration.

Background technique

Space optical remote sensors are large-scale precision optical devices, which need to be installed, adjusted, tested and calibrated on the ground before being sent into space. The existing methods usually use a large-scale precision two-dimensional turntable with a linear or arc guide rail as the main guiding mechanism to fix the space optical remote sensor, so that the macro-displacement of the space optical remote sensor on the fixed reference plane can be realized through the large-scale precision two-dimensional turntable operate.

However, with the increasing demand for ground reconnaissance and mapping, the volume and weight of space optical remote sensors are getting larger and larger. The method of using the traditional large-scale precision two-dimensional turntable to realize the ground calibration of space optical remote sensors has some shortcomings, such as , when the large-scale precision two-dimensional turntable is adjusted for macro-distance horizontal movement under the weight of the space optical remote sensor, it will crawl, resulting in inaccurate macro-displacement positioning and low resolution. At the same time, in order to bear the weight of the space optical remote sensor, the large-scale precision two-dimensional turntable needs a continuous precision guide rail with higher structural strength and larger volume, which not only greatly increases the production cost and production cycle of the guide rail, but also increases the difficulty of assembly and adjustment. and maintainability, therefore, the traditional large-scale precision two-dimensional turntable has gradually been unable to meet the ground adjustment and calibration requirements of space optical remote sensors.

On the other hand, the modular air-floating support device can realize air-floating support under high load-bearing loads, and the fine-tuning mechanism can realize high-precision micro-distance displacement adjustment, but the carrying capacity of the existing small air-floating blocks is limited, and the current Although some large-scale air-floating blocks have a large carrying capacity, they are difficult to process, have a long production cycle and high cost.

Contents of the invention

In order to solve the problem that the existing large-scale precision two-dimensional turntable has gradually been unable to meet the ground adjustment and calibration requirements of space optical remote sensors, and at the same time, the carrying capacity of the existing small Large, but difficult to process, long production cycle, high cost technical problems, the present invention provides a multi-legged optical assembly with a heavy-duty air-floating support device.

The technical solution adopted by the present invention to solve the technical problems is as follows:

The heavy-duty air bearing support device for multi-legged optical installation is characterized in that the device includes a bearing arm, a bearing arm ball stud, a ball and socket shaft assembly, a main bearing plate and three air bearing support assemblies, the ball and socket shaft The assembly includes the bearing arm ball shaft, the first anti-off cover and the connecting bearing, and the air bearing assembly includes the fastening pad, the small shaft of the ball joint, the second anti-off cover and the air bearing block; the upper end of the bearing arm ball stud It is a screw with a ball head at the lower end, and the upper end screw of the ball stud of the load arm is threadedly connected with the screw hole on the load arm, and the ball head of the ball stud of the load arm and the ball socket shaft of the load arm form a first spherical pair;

The main load-bearing plate is a regular triangular prism structure, the center of rotation of its upper end surface is provided with a central groove, and each vertex of an equilateral triangle on the upper end surface of the triangular prism is respectively provided with a vertex through hole, and the bearing arm ball socket The shaft is connected to the central groove of the main bearing plate through the connecting bearing; the first anti-off cover is provided with a central hole with an internal thread, and the diameter of the central hole is smaller than the ball head diameter of the bearing arm ball stud, the first The anti-off cover is fixedly connected with the upper end surface of the main bearing plate;

The small shafts of the ball joints of the three air bearing components pass through a corner through hole of the main bearing plate respectively, the upper ends of the small shafts of the ball joints are fixedly connected with the main bearing plate through fastening pads, and the fastening pads pass through bolts It is fixedly connected with the upper end surface of the main bearing plate; the upper end surface of the air floating block is provided with a ball socket, the diameter of the center hole of the second anti-off cover is smaller than the diameter of the ball head of the small shaft of the ball head, and the second anti-off cover is connected with the air through bolts. The upper end surface of the floating block is fixedly connected, and the ball head at the lower end of the small shaft of the ball head and the ball socket of the air floating block form a second spherical pair.

The beneficial effect of the present invention is that: the multi-legged heavy-duty air-floating support device for optical installation and correction evenly shares the load-bearing pressure transmitted by the ball stud of the load-bearing arm through three small air-floating blocks whose bottom surfaces are coplanar, so that The stress borne by the main load-bearing plate can be evenly dispersed, so the advantages of short processing period, easy production and low cost of the small air-floating block are fully utilized, and the shortcoming of the limited carrying capacity of a single small air-floating block is overcome. The distribution of the three small air bearing blocks makes full use of the stability of the three-point fixed surface. At the same time, the use of multiple ball-and-socket structures also utilizes the principle of spherical centering, making the mechanical transmission path of the entire heavy-duty air bearing support device accurate. , stable, and can fully meet the ground adjustment and calibration requirements of space optical remote sensors.

Description of drawings

Fig. 1 is the perspective view of the heavy-duty air-floating support device for multi-legged optical installation and calibration of the present invention;

Fig. 2 is a side axial partial sectional view of Fig. 1 .

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 2, the heavy-duty air bearing support device for multi-legged optical assembly includes a bearing arm 1, a bearing arm ball stud 2, a ball-and-socket shaft assembly 3, a main bearing plate 4 and three air bearings. The floating support assembly 5, the ball shaft assembly 3 includes the bearing arm ball shaft 3-1, the first anti-off cover 3-2 and the connecting bearing 3-3, the air bearing assembly 5 includes the fastening pad 5-1, the ball head Small shaft 5-2, the second anti-off cover 5-3 and air floating block 5-4.

The upper end of the bearing arm ball stud 2 is a screw, and the lower end is provided with a ball head; the upper end screw of the bearing arm ball stud 2 is threadedly connected with the screw hole on the bearing arm 1, and the ball of the bearing arm ball stud 2 The head and the bearing arm ball and socket shaft 3-1 form a first spherical pair.

The main bearing plate 4 is a regular triangular prism structure, the center of rotation of its upper end surface is provided with a central groove, and each vertex of an equilateral triangle on the upper end surface of the triangular prism is respectively provided with a vertex through hole, and the bearing arm ball The socket shaft 3-1 is connected to the central groove of the main bearing plate 4 through the connecting bearing 3-3; the first anti-off cover 3-2 is provided with a central hole with an internal thread, and the diameter of the central hole is smaller than that of the bearing arm The ball head diameter of the ball stud 2, the first anti-off cover 3-2 is fixedly connected with the upper end surface of the main bearing plate 4.

When assembling, put the ball head of the bearing arm ball stud 2 into the bearing arm ball socket shaft 3-1 to form the first spherical pair, and then put the first anti-off cover 3-2 through the center hole with internal thread Screw along the top of the ball stud 2 of the load arm to the position of the empty knife groove, and then screw the upper end of the ball stud 2 of the load arm to the screw hole on the load arm 1, and finally, use bolts to screw the first anti The outer edge of the cover 3-2 is fixedly connected with the upper end surface of the bearing plate 4. Like this, in the process of whole equipment hoisting and transshipment, due to the position-limiting effect of the empty sipes to the first anti-off cover 3-2, the first anti-off cover 3-2 cannot move axially. Under the blocking of 3-2, the ball head of the bearing arm ball stud 2 will not slip off from the bearing arm ball socket shaft 3-1.

The three air bearing components 5 are all small air bearing blocks, and the small ball shaft 5-2 of each air bearing component 5 passes through a corner through hole of the main force plate 4 respectively, and the small shaft of the ball The upper end of 5-2 is fixedly connected with the main bearing plate 4 through the fastening pad 5-1, and the fastening pad 5-1 is fixedly connected with the upper end surface of the main bearing plate 4 through bolts; the upper end surface of the air floating block 5-4 A ball socket is provided, the diameter of the central hole of the second anti-off cover 5-3 is smaller than the diameter of the ball head of the small shaft 5-2 of the ball head, and the second anti-off cover 5-3 passes through the bolt and the upper end surface of the air floating block 5-4 Fixedly connected, the ball socket of the lower end ball head of the small shaft 5-2 of the ball head and the ball socket of the air floating block 5-4 forms the second spherical pair. The function of the second anti-off cover 5-3 is similar to that of the first anti-off cover 3-2, which can prevent the small shaft 5-2 of the ball joint from being lifted from the upper end surface of the air bearing block 5-4 during the lifting and transfer of the whole equipment. Slip in ball socket.

When specifically applying the heavy-duty air-floating support device for multi-legged optical assembly and calibration of the present invention, first the device is placed on the high-precision platform 6, and each air-floating block 5-4 is ventilated with an air source. Next, a layer of air film will be formed between each air buoyancy block 5-4 and the high-precision platform 6 below itself, so that the air buoyancy block 5-4 is floated, and an air buoyancy force F proportional to the air pressure is generated at the same time. The buoyancy force F concentrates on the second spherical pair formed by the small shaft 5-2 of the ball head and the ball socket of the air floating block 5-4. The three air bearing support components 5 are evenly distributed at 120°. According to the principle of three-point coplanarity, the three second spherical pairs uniquely determine the positions of the main bearing plate 4 and the bearing arm ball shaft 3-1, and The air buoyancy force F of each air buoyancy block 5-4 concentrates on the bearing arm ball shaft 3-1, and the resultant force is 3F.

The ball stud and the ball shaft are connected by a spherical pair, and the ball shaft and the main bearing plate are connected by a rotating pair. When the air source of the air floating block 5-4 is closed, the air floating block 5-4 and the The air film between the high-precision platforms 6 disappears, and the three air-floating support components 5 are attached to the high-precision platforms 6 under the action of gravity. When the bearing arm ball stud 2 is at any angle with the main bearing plate 4, the bearing arm 1 can still move up and down along the axis of the bearing arm ball stud 2 or rotate along the axis by rotating the screw thread. The foot-type optical device uses a heavy-duty air-floating support device to realize the multi-degree-of-freedom movement of the carrying arm.

The heavy-duty air bearing support device for multi-legged optical assembly evenly shares the load-bearing pressure transmitted by the ball stud of the bearing arm through three small air bearing blocks with the same bottom surface, so that the stress on the main load-bearing plate It can be dispersed evenly, so the advantages of short processing cycle, easy production and low cost of the small-sized air-floating block are fully utilized, and the shortcoming of the limited carrying capacity of a single small-sized air-floating block is overcome. The distribution of the three small air bearing blocks makes full use of the stability of the three-point fixed surface. At the same time, the use of multiple ball-and-socket structures also utilizes the principle of spherical centering, making the mechanical transmission path of the entire heavy-duty air bearing support device accurate. , stable, and can fully meet the ground adjustment and calibration requirements of space optical remote sensors.

Claims (1)

1. The heavy-duty air bearing support device for multi-legged optical installation, which is characterized in that the device includes a bearing arm (1), a bearing arm ball stud (2), a ball-and-socket shaft assembly (3), and a main bearing plate (4) and three air bearing assemblies (5), the ball shaft assembly (3) includes the bearing arm ball shaft (3-1), the first anti-off cover (3-2) and the connecting bearing (3-3 ), the air bearing assembly (5) includes a fastening pad (5-1), a small ball shaft (5-2), a second anti-off cover (5-3) and an air bearing block (5-4); the The upper end of the bearing arm ball stud (2) is a screw, and the lower end is provided with a ball head. The upper end screw of the bearing arm ball stud (2) is threadedly connected with the screw hole on the bearing arm (1), and the bearing arm ball screw The ball head of the column (2) and the bearing arm ball socket shaft (3-1) form a first spherical pair; The main bearing plate (4) is a regular triangular prism structure, the center of rotation of its upper end surface is provided with a central groove, and each vertex of an equilateral triangle on the upper end surface of the triangular prism is provided with a vertex through hole respectively. The arm ball socket shaft (3-1) is connected with the central groove of the main bearing plate (4) through the connecting bearing (3-3); the first anti-off cover (3-2) is provided with a central Hole, the diameter of this central hole is less than the diameter of the ball head of the bearing arm ball stud (2), and the first anti-off cover (3-2) is fixedly connected with the upper end surface of the main bearing plate (4); The small ball shafts (5-2) of the three air bearing assemblies (5) respectively pass through a top angle through hole of the main bearing plate (4), and the upper ends of the small ball shafts (5-2) pass through The fastening pad (5-1) is fixedly connected with the main bearing plate (4), and the fastening pad (5-1) is fixedly connected with the upper end surface of the main bearing plate (4) by bolts; the air floating block (5-4 ) is provided with a ball socket, the diameter of the center hole of the second anti-off cover (5-3) is smaller than the diameter of the ball head of the small shaft of the ball head (5-2), and the second anti-off cover (5-3) passes through the bolt It is fixedly connected with the upper end surface of the air floating block (5-4), and the ball socket at the lower end of the small shaft of the ball head (5-2) and the ball socket of the air floating block (5-4) form the second spherical pair.