Vertical driving device applied to high-precision instrument

Abstract

The utility model discloses a vertical driving device applied to a high-precision instrument, and relates to the field of gravity balance. The vertical driving device comprises the external fixing bracket, a rotor connecting plate, a first group of slide rail components, a second group of slide rail components, an external fixing bracket extension part, a vertical voice coil motor, a vertical magnetic spring component and the like, wherein the vertical magnetic spring component comprises a magnetic stator and a magnetic rotor. The vertical magnetic spring assembly outputs constant force in the stroke, and timely response of a high-precision instrument can be achieved. Through calculation, the vertical magnetic spring assembly, the vertical voice coil motor and the mass center of the high-precision instrument are arranged to be located on the same axis, additional torque can be avoided, the motion precision of the high-precision instrument is improved, and power balance can be ideally achieved. Meanwhile, under the condition that a power supply is cut off, the vertical magnetic spring assembly provides constant force output for a long time in the stroke, so that accidents such as rapid falling of a high-precision instrument are avoided.

Description

Technical Field

[0001] The utility model relates to a driving device, in particular to a vertical driving device applied to high-precision instruments. Background Art

[0002] In the vertical linear motion process of high-precision instruments, linear motors or servo motors are often used as power input to perform vertical motion. During the motion process, a constant force must be applied during motion and at rest to offset gravity, which requires the power system to provide additional power to compensate, increasing system costs. Similarly, the actual output force required when the load rises and falls is very different, the thrust fluctuation of the system increases, the operating speed is limited, the positioning accuracy is reduced, the stabilization time is extended, and the high-speed response performance is lost. In addition, due to the particularity of linear motors, in the event of a sudden power outage, the equipment will show a free fall motion state and hit the mechanical limit, causing irreversible damage to the precision movement of high-precision equipment and causing direct economic losses.

[0003] In the prior art, the counterweight of the equipment is often connected to the moving part of the equipment through a wire rope or other connector, which not only requires a large space to implement the counterweight of the equipment, but also requires a lot of maintenance. If the mass to be balanced changes, the system must be modified, and the adaptability is poor. The second type is a mechanical spring, which is a very cheap design element used to provide weight compensation in vertical installation. However, within the range of action of the spring, the linear increase in force does not allow ideal compensation for gravity throughout the stroke. At the same time, the mechanical spring has poor stiffness, requires maintenance, and has poor adaptability. The third type uses a gas pressure spring to compensate for the additional load caused by gravity. In this case, the actual output force required when the load rises and falls is very different, the thrust fluctuation of the system increases, the operating speed is limited, the positioning accuracy is reduced, the stabilization time is prolonged, and the high-speed response performance is lost. At the same time, a pneumatic system is introduced, and the equipment is equipped with pneumatic components such as air sources and valves, and the equipment is relatively complex.

[0004] For high-precision equipment in the vertical movement process, a new method of providing constant force output to balance the gravity of the moving parts of the equipment, thereby reducing the input power of the equipment and achieving the rational use of resources as much as possible, is a technical problem that urgently needs to be solved. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a vertical drive device applied to high-precision instruments, which is used to overcome the technical defects of the gravity balance system in the prior art, such as poor applicability, large space, and maintenance requirements.

[0006] The technical solution of the utility model is: a vertical driving device applied to a high-precision instrument, comprising: a fixedly arranged external fixing bracket, the side surface of the external fixing bracket and a movable connecting plate in a frame-shaped structure are slidably installed through a vertical slide rail assembly; the movable connecting plate is connected to the high-precision instrument;

[0007] An external fixing bracket extension piece is also fixedly arranged in the middle of the external fixing bracket, and the external fixing bracket extension piece extends into the central through hole of the frame of the mover connecting plate;

[0008] A vertical voice coil motor for driving the mover connecting plate to move vertically back and forth is arranged between the extension of the external fixing bracket and the mover connecting plate;

[0009] A vertical magnetic spring assembly is also arranged between the external fixing bracket and the mover connecting plate for counterweight balancing.

[0010] Furthermore, the extension of the external fixing bracket includes a first accommodating cavity with an opening facing downward, and the vertical voice coil motor is accommodated in the first accommodating cavity. The vertical voice coil motor is fixedly connected to the lower horizontal plate in the mover connecting plate.

[0011] Furthermore, the vertical magnetic spring assembly includes a magnetic stator and a magnetic mover. The magnetic stator is fixed on the upper surface of the bottom plate of the external fixing bracket, and the magnetic mover is fixed in the second accommodating cavity of the lower horizontal plate of the mover connecting plate. The magnetic stator and the magnetic mover are clearance-fitted.

[0012] Furthermore, the slide rail assembly is provided in two groups, the first group of slide rail assemblies is provided between the upper part of the mover connecting plate and the vertical plate of the external fixing bracket, and the second group of slide rail assemblies is provided between the lower part of the mover connecting plate and the vertical plate of the external fixing bracket.

[0013] Furthermore, the magnetic stator and the magnetic mover are both magnetized permanent magnets, and the magnetic stator and the magnetic mover output constant force within the travel range.

[0014] Furthermore, a hollow groove is provided at the bottom of the vertical plate of the external fixing bracket for accommodating a grating ruler.

[0015] Furthermore, a mounting frame is fixedly mounted on the outer side of the middle vertical plate of the mover connecting plate, and the high-precision instrument is mounted in the mounting frame.

[0016] Furthermore, the high-precision instrument is a high-precision camera.

[0017] Furthermore, the vertical voice coil motor, the vertical magnetic spring assembly and the mass center of the high-precision instrument are arranged on the same axis.

[0018] The beneficial technical effect of the utility model is that the vertical magnetic spring assembly outputs constant force within the stroke, which can achieve timely response of high-precision instruments. By calculating, the vertical magnetic spring assembly, the vertical voice coil motor, and the center of mass of the high-precision instrument are set to be on the same axis, which can avoid the generation of additional torque, improve the movement accuracy of the high-precision instrument, and achieve dynamic balance more ideally. At the same time, when the power is cut off, because the vertical magnetic spring assembly provides constant force output for a long time within the stroke, unexpected situations such as rapid falling of high-precision instruments can be avoided. In addition, the vertical magnetic spring assembly is maintenance-free, wear-resistant, and occupies very little space, which is far superior to other balancing systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the vertical drive device of the utility model;

[0020] Figure 2 Schematic diagram of the movable connecting plate of the vertical drive device of the utility model;

[0021] Figure 3 A sectional view of the vertical drive device of the utility model in the direction of AA;

[0022] Figure 4 It is a top view of the vertical drive device of the utility model;

[0023] Figure 5 It is a side view of the vertical drive device of the utility model;

[0024] The reference numerals are as follows:

[0025] 1. External fixing bracket; 11. External fixing bracket vertical plate; 12. External fixing bracket bottom plate; 111. Empty slot; 2. Mover connecting plate; 21. Upper horizontal plate; 22. Middle vertical plate; 23. Lower horizontal plate; 231. Second accommodating cavity; 3. First set of slide rail assemblies; 4. Second set of slide rail assemblies; 5. External fixing bracket extension; 51. First accommodating cavity; 6. First vertical voice coil motor; 61. Voice coil motor coil stator; 62. Voice coil motor coil mover; 7. Vertical magnetic spring assembly; 71. Magnetic stator; 72. Magnetic mover; 8. Grating scale; 9. Mounting frame. DETAILED DESCRIPTION

[0026] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0027] See also Figure 1-5, this specific embodiment discloses a vertical driving device for high-precision instruments, the vertical driving device comprises an L-shaped external fixing bracket 1 composed of an external fixing bracket upright plate 11 and an external fixing bracket bottom plate 12, the side of the external fixing bracket upright plate 11 is slidably installed with a frame-type structure movable connecting plate 2 with an opening facing the left side, the movable connecting plate 2 comprises an upper transverse plate 21, a middle upright plate 22 and a lower transverse plate 23, the upper transverse plate 21 and the upper part of the side of the external fixing bracket upright plate 11 are installed with a first group of slide rail assemblies 3, and the horizontal end of the lower transverse plate 23 and the lower part of the side of the external fixing bracket upright plate 11 are installed with a second group of slide rail assemblies 4;

[0028] An external fixing bracket extension 5 is also fixedly provided in the middle of the external fixing bracket vertical plate 11. The external fixing bracket extension 5 includes a first accommodating cavity 51 with an opening facing downward. The first accommodating cavity 51 accommodates a vertical voice coil motor 6. The vertical voice coil motor 6 is fixedly connected to the lower horizontal plate 23 in the mover connecting plate 2.

[0029] The lower horizontal plate 23 includes a second accommodating cavity 231 with a downward opening, and the second accommodating cavity 231 accommodates a vertical magnetic spring assembly 7, and the vertical magnetic spring assembly 7 is fixedly connected to the outer fixing bracket bottom plate 12;

[0030] In another embodiment of the present invention, the external fixing bracket extension 5 may include a first accommodating cavity with an upward opening, and the first accommodating cavity accommodates the vertical voice coil motor 6, and the vertical voice coil motor 6 is fixedly connected to the upper horizontal plate 21 in the mover connecting plate 2.

[0031] In this specific embodiment, the first group of slide rail assemblies 3 and the second group of slide rail assemblies 4 are gear rack guide pairs, and their composition structures are technical solutions known to those skilled in the art and will not be described in detail here.

[0032] The vertical voice coil motor 6 includes a voice coil motor coil stator 61 placed in the first accommodating cavity 51 and fixedly mounted to the external fixing bracket extension 5, and a voice coil motor coil mover 62 fixedly connected to the upper surface of the lower horizontal plate 23, and the voice coil motor coil stator 61 and the voice coil motor coil mover 62 are gap-matched. In this specific embodiment, the voice coil motor coil stator 61 and the external fixing bracket extension 5, and the voice coil motor coil mover 62 and the lower horizontal plate 23 are fixed by screws or the like.

[0033] The vertical magnetic spring assembly 7 includes a magnetic stator 71 and a magnetic mover 72. The magnetic stator 71 is fixed to the upper surface of the external fixed bracket base plate 12 by screws, etc., and the magnetic mover 72 is fixed to the second accommodating cavity 231 of the lower horizontal plate 23 by screws, etc. The magnetic stator 71 and the magnetic mover 72 are clearance-fitted.

[0034] More specifically, the magnetic stator 71 and the magnetic mover 72 are both magnetized permanent magnets. The magnitude and direction of the magnetic force of the magnetic stator 71 and the magnetic mover 72 are related to the magnetization method. The appropriate magnetization method can be selected according to the specific working conditions. This is the prior art and will not be described in detail. The vertical magnetic spring assembly can be selected to be small, thereby reducing the overall equipment space. The vertical magnetic spring assembly provides constant force output for a long time within the stroke, can achieve timely response, and is maintenance-free, wear-resistant, and occupies very little space. It is superior to other balancing systems, and when the power is cut off, there will be no unexpected situations such as rapid falling.

[0035] The bottom of the external fixing bracket vertical plate 11 is provided with an empty slot 111 for accommodating a grating ruler 8. The grating ruler 8 provides real-time feedback of the movement distance of the device to improve the movement accuracy.

[0036] A mounting frame 9 is also fixedly mounted on the outer side of the middle vertical plate 22 of the mover connecting plate 2. Various types of high-precision instruments are mounted in the mounting frame 9. In this specific embodiment, a high-precision camera (not shown in the figure) is mounted.

[0037] In this specific embodiment, through calculation of the control system, the vertical voice coil motor 6, the vertical magnetic spring assembly 7 and the center of mass of the high-precision instrument are set to be located on the same axis, avoiding the generation of additional torque to affect the motion accuracy of the high-precision camera, and achieving a more ideal dynamic balance.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A vertical drive device for high-precision instruments, characterized in that: include: A fixed external fixing bracket (1), the side of the external fixing bracket (1) and a movable connecting plate (2) in a frame-shaped structure are slidably mounted via a vertical slide rail assembly; the movable connecting plate (2) is connected to a high-precision instrument; An external fixing bracket extension piece (5) is also fixedly provided in the middle of the external fixing bracket (1), and the external fixing bracket extension piece (5) extends into the central through hole of the frame of the mover connecting plate (2); A vertical voice coil motor (6) for driving the mover connecting plate (2) to vertically reciprocate is provided between the outer fixing bracket extension (5) and the mover connecting plate (2); A vertical magnetic spring assembly (7) is also provided between the external fixing bracket (1) and the mover connecting plate (2) for counterweight balancing.

2. The vertical drive device for high-precision instruments according to claim 1, characterized in that: The external fixing bracket extension (5) comprises a first accommodating cavity (51) with an opening facing downwards, the first accommodating cavity (51) accommodating the vertical voice coil motor (6), and the vertical voice coil motor (6) is fixedly connected to the lower horizontal plate (23) in the mover connecting plate (2).

3. The vertical driving device for high-precision instruments according to claim 1, characterized in that: The vertical magnetic spring assembly (7) comprises a magnetic stator (71) and a magnetic mover (72); the magnetic stator (71) is fixedly arranged on the upper surface of a bottom plate (12) of an external fixing bracket (1); the magnetic mover (72) is fixedly arranged in a second accommodating cavity (231) of a lower horizontal plate (23) of a mover connecting plate (2); and the magnetic stator (71) and the magnetic mover (72) are clearance-matched.

4. The vertical driving device for high-precision instruments according to claim 3, characterized in that: The slide rail assembly is provided in two groups, the first group of slide rail assemblies is provided between the upper part of the mover connecting plate (2) and the vertical plate (11) of the external fixing bracket, and the second group of slide rail assemblies is provided between the lower part of the mover connecting plate (2) and the vertical plate (11) of the external fixing bracket.

5. The vertical driving device for high-precision instruments according to claim 3, characterized in that: The magnetic stator (71) and the magnetic mover (72) are both magnetized permanent magnets, and the magnetic stator (71) and the magnetic mover (72) output constant force within a travel range.

6. The vertical driving device for high-precision instruments according to claim 1, characterized in that: The bottom of the external fixing bracket vertical plate (11) is provided with an empty groove (111) for accommodating a grating ruler (8).

7. The vertical driving device for high-precision instruments according to claim 1, characterized in that: A mounting frame (9) is also fixedly mounted on the outer side of the middle vertical plate (22) of the mover connecting plate (2), and the high-precision instrument is mounted in the mounting frame (9).

8. The vertical driving device for high-precision instruments according to claim 7, characterized in that: The high-precision instrument is a high-precision camera.

9. The vertical driving device for high-precision instruments according to claim 7, characterized in that: The vertical voice coil motor (6), the vertical magnetic spring assembly (7) and the mass center of the high-precision instrument are arranged on the same axis.

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