A concentric swing arm motion structure

Abstract

The present invention discloses a concentric swing arm motion structure, which relates to the field of precision instrument technology. The present invention includes a proximal ultra-precision arc track structure, a high-strength integral swing arm, a high-precision air-floating support structure, a driving structure, and a plurality of supporting roller structures; the high-strength integral swing arm is used to install and place various large-scale measuring equipment or precision instruments, and realize various high-precision and high-stability motion measurements of objects in concentric positions; the high-strength integral swing arm is supported by a supporting roller structure, and is air-floated and lifted by a plurality of groups of high-precision air-floating support structures to reduce motion resistance, and is driven by a driving structure to swing around the center. The present invention can effectively get rid of the limitation of having to be driven by the center, and realize concentric swinging under the space limitation of walls, other devices, etc. around the center of the swing arm, and ensure the high stability after the far end swings into place, and effectively solve the torsion swing problem during the swinging process, and realize various high-precision and high-stability motion test requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of precision instruments, and in particular relates to a concentric swing arm motion structure. Background Art

[0002] The swing arm structures of existing products all belong to the central drive mode, which realizes the swing arm movement through the central driving force and the principle of the long arm connecting rod to achieve the transmission effect or transportation and delivery work. At present, the concentrically driven structures on the market are relatively rough, and the movement accuracy and structural stability are relatively poor. The movement accuracy and stability control of the swing arm above 3 meters are already very high precision at the mm level. In fact, they can only be used in mechanical transmission, transportation and other aspects, and cannot meet the needs of large-scale precision measurement and other occasions that require high-precision and high-stability concentric swing. Moreover, the central drive method will require a very large driving force on a large swing arm mechanism, and it is also prone to torsion energy problems, and it cannot achieve the ideal effect when used in high-precision occasions. In addition, in some equipment working occasions or testing occasions, there are other devices at the swing center, which makes the concentric swing arm structure unable to be driven by the center, but must be accurately rotated around the center, so the existing traditional mechanism devices on the market are even more powerless. Therefore, in view of the above problems, it is of great significance to provide a concentric swing arm motion structure. Summary of the invention

[0003] The present invention provides a concentric swing arm motion structure to solve the above problems.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] A concentric swing arm motion structure of the present invention comprises a proximal ultra-precision arc track structure, a high-strength integral swing arm connected to the proximal ultra-precision arc track structure in an arc-shaped sliding manner through an ultra-precision sliding structure to achieve concentric swinging, a plurality of groups of high-precision air-floating support structures installed at the bottom of the high-strength integral swing arm to reduce the resistance during the movement of the high-strength integral swing arm, a driving structure installed at the far end of the high-strength integral swing arm, and a plurality of groups of supporting roller structures installed at the bottom of the high-strength integral swing arm;

[0006] The high-strength integral swing arm is used to install and place various large-scale measuring equipment or precision instruments, so as to realize various high-precision and high-stability motion measurements of objects in concentric positions; the high-strength integral swing arm is supported by a supporting roller structure, and is lifted by air by several groups of high-precision air-floating support structures to reduce motion resistance, and is driven by a driving structure to realize high-precision swing arm motion around the center.

[0007] Furthermore, the proximal ultra-precision arc rail structure includes an arc-shaped base plate, an ultra-precision arc slide rail installed on the arc-shaped base plate and concentric with the arc-shaped base plate, limit blocks installed on the arc-shaped base plate and located at both ends of the ultra-precision arc slide rail, and a plurality of high-load-bearing sliders slidably fitted on the ultra-precision arc slide rail, and an arc-shaped bearing plate which is concentric with the ultra-precision arc slide rail and is used to fix and support the proximal end of the high-strength integral swing arm is fixedly installed on the high-load-bearing slider.

[0008] Furthermore, a high-precision arc grating for real-time tracking and closed-loop precise control of the swing angle is installed around the outer side of the ultra-precision arc slide rail, so that the swing angle resolution and accuracy of the swing arm reach the second level.

[0009] Furthermore, the high-strength integral swing arm adopts an integrated linear steel structure, and a weight-reducing hole is opened on the side.

[0010] Furthermore, the driving structure includes a driving motor fixedly mounted on the end of the high-strength integral swing arm, a rotating wheel mounted on the support at the end of the motor output shaft through a coupling, a driving wheel mounting seat symmetrically mounted on both sides of the bottom of the far end of the high-strength integral swing arm, and a transmission wheel support symmetrically mounted between the support and the driving wheel mounting seat, a transmission wheel rotatably mounted on the transmission wheel support, a driving wheel mounted on the driving wheel mounting seat, and the rotating wheel, the transmission wheel, and the driving wheel are connected by a tensioning belt transmission.

[0011] Furthermore, a hand wheel is arranged outside the driving motor.

[0012] Furthermore, each of the high-precision air-floating support structures is evenly distributed according to the overall load-bearing conditions of the high-strength integral swing arm and the upper bearing components. Each of the high-precision air-floating support structures includes two mounting seats symmetrically arranged at the bottom of the high-strength integral swing arm and two air-floating pads installed on each mounting seat and supplied with air by side air supply ports. The two mounting seats are connected by a rotating shaft that cooperates with the bearings on the mounting seats.

[0013] Furthermore, the supporting roller structures are installed via roller mounting seats, and each of the supporting roller structures includes at least two rollers that move concentrically with the proximal ultra-precision arc track structure.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The track of the present invention adopts a near-end precision arc track and a far-end 3-4 meter distance to drive the swing arm. Compared with the original center-driven swing arm method, it is more suitable for occasions where the center of the circle is occupied and there is no center space that can be used as the center drive of the swing arm structure.

[0016] 2. The arc track structure of the present invention is more suitable for large-scale high-precision applications because it can reduce the driving force and increase the far-end stability. At the same time, because the drive is at the maximum radius, the driving arc length is increased, which can greatly improve the resolution and accuracy of the swing compared to the existing center-driven swing arm.

[0017] 3. In order to overcome the large friction resistance caused by the excessive length and weight of the device itself, the high-strength integral swing arm of the present invention arranges multiple air flotation pads at the bottom according to the gravity distribution during the swinging process, so that the structure will not be torsionally swung due to excessive resistance during the swinging process, and the 20um air film will not cause excessive deformation of the guide rail that plays a role in regulating the trajectory, thereby achieving stable swinging; the existing concentric large swing arm mechanism on the market is only supported by the central bearing, so it is inevitable that there will be large fluctuations during the swinging process, which puts a heavy burden on the bearing and greatly increases the movement resistance. Our design uses air flotation, which can greatly reduce the resistance, greatly improve the movement efficiency of the concentric swing arm structure, reduce the additional stress caused by mechanical resistance, and improve the stability of the movement.

[0018] 4. After the high-strength integral swing arm of the present invention swings to the required position, the buoyancy is removed and the large swing arm can be stably positioned at the required position by its own weight without drifting, shaking and other instability problems caused by the traditional mechanical transmission gap, providing stable working conditions for large-scale, high-precision testing and tooling.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of a concentric swing arm motion structure according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 The main view of the structure;

[0023] Figure 3 for Figure 1 A top view of the structure;

[0024] Figure 4 It is a structural schematic diagram of the proximal ultra-precision arc track structure of the present invention;

[0025] Figure 5 for Figure 4 A top view of the structure;

[0026] Figure 6 for Figure 4 The left view of the structure;

[0027] Figure 7 It is a structural schematic diagram of the driving structure of the present invention;

[0028] Figure 8 for Figure 7 The main view of the structure;

[0029] Fig. 9 for Figure 7 A top view of the structure;

[0030] Fig.10 It is a structural schematic diagram of the high-precision air-floating support structure of the present invention;

[0031] Fig.11 for Fig.10 The main view of the structure;

[0032] Fig.12 for Fig.10 A top view of the structure;

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1-proximal ultra-precision arc rail structure, 101-high-precision circular arc grating, 102-arc bottom plate, 103-ultra-precision arc slide rail, 104-arc bearing plate, 105-limit block, 2-high-strength integral swing arm, 201-weight reduction hole, 3-driving structure, 301-driving motor, 302-handwheel, 303-driving wheel mounting seat, 304-support, 305-transmission wheel, 3051-transmission wheel support, 306-tensioning belt, 307-rotating wheel, 4-driving wheel, 5-high-precision air floating support structure, 501-mounting seat, 5011-bearing, 502-air floating pad, 5021-air supply port, 503-rotating shaft, 6-support roller structure. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "proximal", "outer side", "bottom", "side" and the like indicate orientation or positional relationship, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] See also Figure 1-12 As shown, a concentric swing arm motion structure of the present invention comprises a proximal ultra-precision arc track structure 1, a high-strength integral swing arm 2 connected to the proximal ultra-precision arc track structure 1 by an ultra-precision sliding structure to achieve concentric swing, three groups of high-precision air-floating support structures 5 installed at the bottom of the high-strength integral swing arm 2 for reducing the resistance during the movement of the high-strength integral swing arm 2, a driving structure 3 installed at the far end of the high-strength integral swing arm 2, and multiple groups of supporting roller structures 6 installed at the bottom of the high-strength integral swing arm 2;

[0038] The high-strength integral swing arm 2 is used to install and place various large-scale measuring equipment or precision instruments. Its length is 3-4 meters, and it can realize various high-precision and high-stability motion measurements of objects in concentric positions; the high-strength integral swing arm 2 is supported by a supporting roller structure 6, and is air-floated and lifted by three groups of high-precision air-floating support structures 5 to reduce the movement resistance, and is driven by a driving structure 3 to realize the high-precision swing arm movement of the high-strength integral swing arm 2 around the center.

[0039] Among them, the proximal ultra-precision arc rail structure 1 includes an arc-shaped base plate 102, an ultra-precision arc slide rail 103 installed on the arc-shaped base plate 102 and concentric with the arc-shaped base plate 102, limit blocks 105 installed on the arc-shaped base plate 102 and located at both ends of the ultra-precision arc slide rail 103, and three high-load-bearing sliders slidably matched on the ultra-precision arc slide rail 103. An arc-shaped bearing plate 104 is fixedly installed on the high-load-bearing slider and is concentric with the ultra-precision arc slide rail 103 and is used to fix and support the proximal end of the high-strength integral swing arm 2.

[0040] Among them, a high-precision arc grating 101 for real-time tracking and closed-loop precise control of the swing angle is installed around the outer side of the ultra-precision arc slide rail 103, so that the swing angle resolution and accuracy of the swing arm reach the second level.

[0041] The high-strength integral swing arm 2 adopts an integrated linear steel structure, and a weight-reducing hole 201 is opened on the side.

[0042] Among them, the driving structure 3 includes a driving motor 301 fixedly installed at the end of the high-strength integral swing arm 2, a rotating wheel 307 installed on the support 304 at the end of the motor output shaft through a coupling, a driving wheel mounting seat 303 symmetrically installed on both sides of the far bottom of the high-strength integral swing arm 2, and a transmission wheel support 3051 symmetrically installed between the support 304 and the driving wheel mounting seat 303. A transmission wheel 305 is rotatably installed on the transmission wheel support 3051, and a driving wheel 4 is installed on the driving wheel mounting seat 303. The rotating wheel 307, the transmission wheel 305, and the driving wheel 4 are connected by a tensioning belt 306.

[0043] A hand wheel 302 is disposed outside the driving motor 301 .

[0044] Among them, each high-precision air-floating support structure 5 is evenly distributed according to the overall load-bearing conditions of the high-strength integral swing arm 2 and the upper bearing components. Each of the high-precision air-floating support structures 5 includes two mounting seats 501 symmetrically arranged at the bottom of the high-strength integral swing arm 2 and two air-floating pads 502 installed on each mounting seat 501 and supplied with air by side air supply ports 5021. The two mounting seats 501 are connected by a rotating shaft 503 that cooperates with the bearings 5011 on the mounting seats 501. Each air-floating pad 502 floats the high-strength integral swing arm 2 by 20um.

[0045] The supporting roller structure 6 is installed through a roller mounting seat, and each supporting roller structure 6 includes at least two rollers that move concentrically with the proximal ultra-precision arc track structure 1 .

[0046] The design idea of ​​the present invention is to adopt a remote-drive method for the swing arm and adopt a layout of a precision arc rail around the center within the space range allowed for operation, which can effectively get rid of the limitation of central drive and realize concentric swinging when there are walls, other devices and other space constraints around the center of the swing arm. Moreover, due to the high-precision guide rail around the center and the remote motor drive, the driving force required for the swing arm will be greatly reduced, thereby reducing energy consumption and reducing the volume and weight of the drive device. In addition, the stability of large-scale swing arm structures will be greatly reduced at the far end. The device we designed cleverly solves this problem, ensures high stability after the far end is swung into place, and effectively solves the torsion problem during the swinging process. Various large-scale measuring equipment or precision instruments can be installed and placed on the basis of the device of the present invention to achieve various high-precision and high-stability motion testing requirements.

[0047] Working method of the present invention:

[0048] First, the near-end ultra-precision arc track structure 1 is used as the standard track of the entire large swing arm system, thus providing a basis for realizing the concentric swing of the large swing arm. There are several matching precision sliders on the arc track, through which the high-strength integral swing arm 2 is installed and connected; the high-strength integral swing arm 2 is an integrated steel structure, which ensures the rigidity and linearity of the 3-meter-long swing arm, and at the same time increases the weight-reducing hole 201, which relatively reduces the weight of the overall mechanism. Then, a stepper drive motor and a matching drive structure are installed at the far end of the large swing arm, and the drive motor is fixed to the far end of the high-strength integral swing arm 2 through the motor mounting plate, and connected to the high-precision gear and support roller through the coupling, and the rotation of the motor output shaft is converted into the rolling of the drive wheel 4, thereby driving the large swing arm to swing around the center. In order to ensure that the accuracy of the swing angle is high enough, we installed a high-precision arc grating 101 on the outside of the near-end arc track, so as to realize real-time tracking and closed-loop precise control of the swing angle, and the swing angle resolution and accuracy of the swing arm reach the second level. At the bottom of the high-strength integral swing arm 2, we arranged 8 groups of air flotation pads 502 based on the gravity distribution simulation. The air flotation blocks are ventilated to form buoyancy, which greatly reduces the resistance during the movement of the swing arm, ensures the smooth movement of the mechanism, and reduces the torque required for driving.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] 1. The track of the present invention adopts a near-end precision arc track and a far-end 3-4 meter distance to drive the swing arm. Compared with the original center-driven swing arm method, it is more suitable for occasions where the center of the circle is occupied and there is no center space that can be used as the center drive of the swing arm structure.

[0051] 2. The arc track structure of the present invention is more suitable for large-scale high-precision applications because it can reduce the driving force and increase the far-end stability. At the same time, because the drive is at the maximum radius, the driving arc length is increased, which can greatly improve the resolution and accuracy of the swing compared to the existing center-driven swing arm.

[0052] 3. In order to overcome the large friction resistance caused by the excessive length and weight of the device itself, the high-strength integral swing arm of the present invention arranges multiple air flotation pads at the bottom according to the gravity distribution during the swinging process, so that the structure will not be torsionally swung due to excessive resistance during the swinging process, and the 20um air film will not cause excessive deformation of the guide rail that plays a role in regulating the trajectory, thereby achieving stable swinging; the existing concentric large swing arm mechanism on the market is only supported by the central bearing, so it is inevitable that there will be large fluctuations during the swinging process, which puts a heavy burden on the bearing and greatly increases the movement resistance. Our design uses air flotation, which can greatly reduce the resistance, greatly improve the movement efficiency of the concentric swing arm structure, reduce the additional stress caused by mechanical resistance, and improve the stability of the movement.

[0053] 4. After the high-strength integral swing arm of the present invention swings to the required position, the buoyancy is removed and the large swing arm can be stably positioned at the required position by its own weight without drifting, shaking and other instability problems caused by the traditional mechanical transmission gap, providing stable working conditions for large-scale, high-precision testing and tooling.

[0054] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A concentric swing arm motion structure, characterized in that: The invention comprises a proximal ultra-precision arc track structure (1), a high-strength integral swing arm (2) connected to the proximal ultra-precision arc track structure (1) by an ultra-precision sliding structure to achieve concentric swing, a plurality of groups of high-precision air-floating support structures (5) installed at the bottom of the high-strength integral swing arm (2) to reduce the resistance of the high-strength integral swing arm (2) during movement, a driving structure (3) installed at the far end of the high-strength integral swing arm (2), and a plurality of groups of supporting roller structures (6) installed at the bottom of the high-strength integral swing arm (2); The high-strength integral swing arm (2) is used to install and place various large-scale measuring equipment or precision instruments, so as to realize various high-precision and high-stability motion measurements of objects in concentric positions; the high-strength integral swing arm (2) is supported by a supporting roller structure (6), and is air-floated and lifted by a plurality of groups of high-precision air-floating support structures (5) to reduce motion resistance, and is driven by a driving structure (3) to realize high-precision swing arm motion around the center of the high-strength integral swing arm (2).

2. A concentric swing arm motion structure according to claim 1, characterized in that: The proximal ultra-precision arc rail structure (1) comprises an arc-shaped base plate (102), an ultra-precision arc-shaped slide rail (103) mounted on the arc-shaped base plate (102) and concentric with the arc-shaped base plate (102), limit blocks (105) mounted on the arc-shaped base plate (102) and located at both ends of the ultra-precision arc-shaped slide rail (103), and a plurality of high-load-bearing sliders slidably matched on the ultra-precision arc-shaped slide rail (103); an arc-shaped bearing plate (104) for fixing and bearing the proximal end of the high-strength integral swing arm (2) and concentric with the ultra-precision arc-shaped slide rail (103) is fixedly mounted on the high-load-bearing slider.

3. A concentric swing arm motion structure according to claim 2, characterized in that: A high-precision circular arc grating (101) for real-time tracking of the swing angle and closed-loop precise control is installed around the outer side of the ultra-precision arc slide rail (103), so that the swing angle resolution and accuracy of the swing arm reach the second level.

4. A concentric swing arm motion structure according to claim 1, characterized in that: The high-strength integral swing arm (2) adopts an integrated linear steel structure, and a weight-reducing hole (201) is opened on the side.

5. The concentric swing arm motion structure according to claim 1, characterized in that: The driving structure (3) comprises a driving motor (301) fixedly mounted on the end of a high-strength integral swing arm (2), a rotating wheel (307) mounted on a support (304) at the end of the motor output shaft through a coupling, a driving wheel mounting seat (303) symmetrically mounted on both sides of the bottom of the far end of the high-strength integral swing arm (2), and a transmission wheel support (3051) symmetrically mounted between the support (304) and the driving wheel mounting seat (303), a transmission wheel (305) rotatably mounted on the transmission wheel support (3051), a driving wheel (4) mounted on the driving wheel mounting seat (303), and the rotating wheel (307), the transmission wheel (305) and the driving wheel (4) are connected to each other through a tensioning belt (306).

6. A concentric swing arm motion structure according to claim 5, characterized in that: A hand wheel (302) is arranged outside the driving motor (301).

7. The concentric swing arm motion structure according to claim 1, characterized in that: Each of the high-precision air-floating support structures (5) is evenly distributed according to the overall load-bearing conditions of the high-strength integral swing arm (2) and the upper bearing components. Each of the high-precision air-floating support structures (5) comprises two mounting seats (501) symmetrically arranged at the bottom of the high-strength integral swing arm (2) and two air-floating pads (502) mounted on each mounting seat (501) and supplied with air by side air supply ports (5021). The two mounting seats (501) are connected by a rotating shaft (503) that cooperates with a bearing (5011) on the mounting seat (501).

8. The concentric swing arm motion structure according to claim 1, characterized in that: The supporting roller structures (6) are installed via roller mounting seats, and each supporting roller structure (6) comprises at least two rollers that move coaxially with the proximal ultra-precision arc track structure (1).

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