High-precision lifting device

Abstract

This invention provides a high-precision lifting device, relating to the field of optical equipment. The lifting device includes: a lifting platform for supporting optical equipment; multiple lifting structures spaced apart and connected to the lifting platform, each capable of rotating to drive the lifting platform to move up and down; a transmission chain forming a closed structure and connected to each lifting structure to drive them to rotate synchronously; pressure rollers in contact with the transmission chain for pressing it; and a cover plate located between the lifting platform and the pressure rollers, covering the pressure rollers and the transmission chain, with clearance holes for the lifting structures to pass through. This lifting device enables high-precision synchronous movement of the lifting structures and reduces the impact of splashed lubricating oil or grease on the optical equipment.

Description

Technical Field

[0001] This invention relates to the field of optical equipment, and more particularly to a high-precision lifting device. Background Technology

[0002] To facilitate the transport and storage of optical equipment, the equipment needs to be placed on a lifting platform. When needed, the platform lifts the equipment. The lifting system consists of multiple lifting structures supported below the platform and driving its movement. Insufficient precision in the synchronized movement of these lifting structures can cause the platform to wobble, resulting in the optical equipment not meeting required operating postures. Summary of the Invention

[0003] This invention provides a high-precision lifting device for use in... How to improve the various lifting structures in the lifting device The technical problem of synchronous motion accuracy.

[0004] This invention provides a high-precision lifting device, comprising: a lifting platform for supporting optical equipment; a lifting structure, wherein multiple lifting structures are spaced apart and each lifting structure is connected to the lifting platform, and the lifting structure can drive the lifting platform to move up and down through rotational motion; a transmission chain, which surrounds and forms a closed structure and is connected to each lifting structure to drive each lifting structure to rotate synchronously; a pressure wheel, which contacts the transmission chain and is used to press the transmission chain; and a cover plate, located between the lifting platform and the pressure wheel, for covering each pressure wheel and the transmission chain, and the cover plate has clearance holes for the lifting structures to pass through.

[0005] In some embodiments, the cover plate has multiple cutouts, and the cutouts are spaced apart in a direction perpendicular to the thickness of the cover plate; wherein the cutouts include clearance cutouts and blocking cutouts, and in the thickness direction of the cover plate, the clearance cutouts extend in a straight line to form the clearance holes, and the blocking cutouts extend in a curve.

[0006] In some embodiments, the lifting structure includes: a sleeve; a column located inside the sleeve and movably connected to the sleeve, one end of the column extending out of the sleeve and connected to the lifting platform, and the other end of the column extending out of the sleeve and connected to the transmission chain; wherein the column and the sleeve form a ball screw pair, the sleeve passes through the clearance hole, and a sealing structure is provided between the sleeve and the clearance hole.

[0007] In some embodiments, the lifting structure includes: a lead screw, the lifting platform being sleeved on the outside of the lead screw and forming a ball screw pair with the lead screw; wherein the lead screw passes through the clearance hole, and a flexible sealing structure is provided between the lead screw and the clearance hole, the flexible sealing structure being capable of deformation in the extension direction of the lead screw.

[0008] In some embodiments, in the extending direction of the lifting structure, the projections of each of the pressing wheels on the bottom surface of the lifting platform are all located within the space enclosed by the outer contour of the bottom surface.

[0009] In some implementations, the pressure roller is capable of sliding in a direction toward or away from the drive chain.

[0010] In some embodiments, the lifting device further includes a drive motor and a first transmission structure, the first transmission structure connecting the drive motor to one of the lifting structures.

[0011] In some embodiments, the lifting device further includes a rotating handwheel and a second transmission structure, the second transmission structure connecting the rotating handwheel to one of the lifting structures.

[0012] In some embodiments, the lifting device further includes: a pressure sensor fixed to the lifting platform, the pressure sensor being used to contact a blocking structure located at the target rising position of the lifting platform; and a motion control component for acquiring pressure data from the pressure sensor and controlling the lifting structure to stop moving when the pressure data exceeds a pressure threshold.

[0013] In some embodiments, the lifting device further includes: a first locking portion fixed to the lifting platform; a second locking portion fixed to a fixed surface at the target lifting position; a magnetic structure fixed to the top surface of the lifting platform; a Hall sensor fixed to the top of the lead screw, with the Hall sensor facing the magnetic structure; and a locking control component for acquiring an electrical signal from the Hall sensor, controlling the first locking portion and the second locking portion to lock when the intensity of the electrical signal is greater than an intensity threshold, shielding the electrical signal and controlling the first locking portion and the second locking portion to unlock when an unlocking command is received, and canceling the shielding of the electrical signal when the lifting device moves away from the target lifting position.

[0014] This invention provides a high-precision lifting device, which includes a lifting platform for supporting optical equipment, multiple lifting structures spaced apart, each lifting structure connected to the lifting platform and capable of driving the lifting platform to move up and down through rotational motion; the lifting device also includes a transmission chain connecting each lifting structure to drive the lifting structure to rotate synchronously, and a pressure wheel for pressing the transmission chain, so that the lifting structures can rotate synchronously with high precision through the transmission chain and the pressure wheel; moreover, the lifting device also includes a cover plate for covering the pressure wheel and the transmission chain, that is, in addition to the need to lubricate the transmission chain and the pressure wheel with lubricating oil or grease, the cover plate shields the transmission chain or pressure wheel from splashing lubricating oil or grease, so as to avoid splashing lubricating oil or grease from affecting the optical equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a high-precision lifting device with the cover plate removed, provided in an embodiment of the present invention.

[0016] Figure 2 A schematic diagram of the assembly of a cover plate and a lifting structure in a high-precision lifting device provided in an embodiment of the present invention;

[0017] Figure 3 A top view of a cover plate in a high-precision lifting device provided in an embodiment of the present invention;

[0018] Figure 4 for Figure 3 Sectional view of section AA;

[0019] Figure 5 An exploded view of the cover plate and the first type of lifting structure in the high-precision lifting device provided in the embodiments of the present invention;

[0020] Figure 6 An exploded view of the cover plate and the second type of lifting structure in the high-precision lifting device provided in the embodiments of the present invention;

[0021] Figure 7 This invention provides an assembly diagram of the lifting structure, rotating handwheel, and second transmission structure in a high-precision lifting device.

[0022] Figure 8 This invention provides an assembly diagram of the first locking part and the second locking part in a high-precision lifting device for embodiments of the present invention.

[0023] Explanation of reference numerals in the attached figures

[0024] 1. Lifting device; 10. Lifting platform; 20. Lifting structure; 20A. First type of lifting structure; 21A. Sleeve; 22A. Column; 20B. Second type of lifting structure; 21B. Lead screw; 30. Transmission chain; 40. Pressure wheel; 50. Cover plate; 51. Clearance hole; 52. Hole; 521. Blocking hole; 522. Clearance hole; 61. Drive motor; 62. First transmission structure; 71. Rotary handwheel; 72. Second transmission structure; 81. Pressure sensor; 82. Motion control component; 91. First locking part; 911. Locking motor; 912. Locking cylinder; 913. Lock tongue; 92. Second locking part; 921. Lock seat. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The specific technical features described in the various embodiments in the detailed implementation can be combined in various ways without contradiction. For example, different implementation methods can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0027] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0028] Additionally, it should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate any similarity or connection between them. It should be understood that the directional descriptions such as "above," "below," "inside," and "outside" refer to the orientation under normal use conditions.

[0029] In the following specific embodiments, the high-precision lifting device can be used to carry any optical equipment, such as an optical radar, laser rangefinder, or optical theodolite. The high-precision lifting device can be fixed to any transportation equipment; for example, the transportation equipment can be a vehicle or a ship. The structure and function of the high-precision lifting device are described below with reference to various embodiments.

[0030] In some embodiments, combined with Figure 1 and Figure 2 The high-precision lifting device 1 includes: a lifting platform 10, a lifting structure 20, a transmission chain 30, a pressure wheel 40, and a cover plate 50. The lifting platform 10 is used to support optical equipment. The lifting structure 20 is connected to the lifting platform 10 to drive the lifting platform 10 to move up and down. Multiple lifting structures 20 are spaced apart and connected to the lifting platform 10 to provide more reliable support for the lifting platform 10. Each lifting structure 20 can drive the lifting platform 10 to move up and down through rotation. It can be understood that the rotation of the lifting structure 20 can be converted into the linear motion of the lifting platform 10, thereby driving the lifting platform 10 to move up and down. It should be noted that if the rotation of each lifting platform 10 is not synchronized, it will cause the lifting platform 10 to wobble during the lifting process, resulting in the optical equipment's working posture not meeting the requirements. To ensure the reliability of the optical equipment, each lifting structure 20 needs to perform high-precision rotation, ensuring that the positioning accuracy of the four corners of the platform after lifting is less than or equal to 5 minutes. It can be understood that the angle difference of rotation of each lifting structure 20 per unit time needs to be within a very small angle threshold. The structure for achieving high-precision synchronous rotation of each lifting structure 20 is described below.

[0031] The transmission chain 30 surrounds and forms a closed structure that connects end to end and is connected to each lifting structure 20 to drive each lifting structure to rotate synchronously. It should be noted that mechanical transmission is required to enable each lifting structure 20 to rotate synchronously with reliable and high precision. At the same time, since the intervals between each lifting structure 20 are relatively large, the mechanical transmission structure needs to perform transmission over a large span. Therefore, the mechanical transmission structure needs to be selected from belt drive and chain drive. Since belt drive has slippage and deformation characteristics that cannot meet the requirements of high precision transmission, the transmission chain 30 is required to drive each lifting structure 20 to rotate synchronously. Moreover, in order to prevent the slack or wobbling of the transmission chain 30 from affecting the transmission accuracy, the pressure wheel 40 is also required to press the transmission chain 30.

[0032] Meanwhile, the cover plate 50 is located between the lifting platform 10 and the pressure roller 40, and is used to cover the pressure roller 40 and the transmission chain 30. In order to extend the service life of the transmission chain 30 and make the movement of the transmission chain 30 smoother, the transmission chain 30 needs to be lubricated with lubricating oil or grease. During the movement of the transmission chain 30, the lubricating oil or grease may splash onto the surface of the optical equipment or even enter the optical equipment. Therefore, the cover plate 50 needs to be set to cover the transmission chain 30 and the pressure roller 40 to block the splashed lubricating oil or grease, thereby protecting the optical equipment. Moreover, while the cover plate 50 covers the transmission chain 30, it is also necessary to avoid movement interference between the lifting structure 20 and the cover plate 50. Therefore, the cover plate 50 needs to be provided with a clearance hole 51 for the lifting structure 20 to pass through. It should be noted that for general equipment, lubricating oil and grease splashed onto the surface of the equipment will not affect its function, and a small amount of lubricating oil and grease entering the equipment is unlikely to cause malfunction. Moreover, installing a cover plate may create a risk of motion interference with the lifting structure. Therefore, it would be difficult for someone skilled in the art to think of installing a cover plate on the transmission chain and the pressure roller. However, optical components in optical equipment have very high requirements for cleanliness, and splashed lubricating oil and grease can have a significant impact on the function of the optical equipment. Thus, overcoming the technical bias in the art, it was thought that a cover plate 50 should be installed to avoid splashed lubricating oil or grease from affecting the optical equipment.

[0033] This invention provides a high-precision lifting device, which includes a lifting platform for supporting optical equipment, multiple lifting structures spaced apart, each lifting structure connected to the lifting platform and capable of driving the lifting platform to move up and down through rotational motion; the lifting device also includes a transmission chain connecting each lifting structure to drive the lifting structure to rotate synchronously, and a pressure wheel for pressing the transmission chain, so that the lifting structures can rotate synchronously with high precision through the transmission chain and the pressure wheel; moreover, the lifting device also includes a cover plate for covering the pressure wheel and the transmission chain, that is, in addition to the need to lubricate the transmission chain and the pressure wheel with lubricating oil or grease, the cover plate shields the transmission chain or pressure wheel from splashing lubricating oil or grease, so as to avoid splashing lubricating oil or grease from affecting the optical equipment.

[0034] In some embodiments, the end of the lifting structure is fixed to the support surface, which provides reliable support for the lifting structure. Optionally, the cover plate has support legs, which support the cover plate to the support surface, allowing the cover plate to cover the drive chain and the pressure roller; alternatively, the support surface is recessed to form a receiving cavity, in which the drive chain and the pressure roller are located, and the edge of the cover plate is supported by the support surface, allowing the cover plate to cover the drive chain and the pressure roller. Optionally, the cover plate has a split structure, which facilitates separation of the cover plate from the lifting structure, making it easy to disassemble and assemble the cover plate when maintenance or repair of the drive chain and the pressure roller is required.

[0035] In some embodiments, the lifting device has a drive sprocket. The rotation of the drive sprocket can be transmitted to each lifting structure through a transmission chain, thereby driving each lifting structure to rotate. The drive sprocket can be set independently or it can be set in one of the lifting structures. The drive sprocket can be driven by a drive device or it can be rotated manually.

[0036] In some embodiments, such as Figure 3 As shown, the cover plate 50 has multiple perforations 52. These perforations 52 are spaced apart in the direction perpendicular to the thickness of the cover plate 50. By providing the perforations 52, the weight of the cover plate 50 can be reduced, thus facilitating its assembly and disassembly. Furthermore, the spaced perforations 52 in the direction perpendicular to the thickness of the cover plate 50 provide sufficient protection against splashed lubricating oil or grease, and also reduce the impact of the perforations 52 on the structural strength of the cover plate 50. For example, Figure 4 As shown, the cutout 52 includes a blocking cutout 521 and a clearance cutout 522. In the thickness direction of the cover plate 50, the clearance cutout 522 extends in a straight line to form a clearance hole 51. The clearance cutout 522 is used for the lifting structure 20 to pass through. The blocking cutout 521 extends in a curve, thereby forming a labyrinth structure through bending extension to more effectively block splashed lubricating oil or grease.

[0037] In some embodiments, such as Figure 5 As shown, the first type of lifting structure 20A includes: a sleeve 21A and a column 22A. The sleeve 21A is fitted inside the column 22A. One end of the column 22A extends out of the sleeve 21A and is connected to the lifting platform 10. The other end of the column 22A extends out of the sleeve and is connected to... Figure 1 The transmission chain 30 is connected in the middle, wherein the column 22A and the sleeve 21A form a ball screw pair. It can be understood that the column 22A is a screw with external threads, the sleeve 21A has internal threads, and balls are provided between the external threads and the internal threads. This ball screw pair can convert the rotational motion of the column 22A into linear motion along the extension direction of the column 22A. A rotary bearing is provided between the column 22A and the lifting platform 10 so that the linear motion of the column 22A can be transmitted to the lifting platform 10 and drive the lifting platform 10 to perform lifting motion, and the rotational motion of the column 22A will not be transmitted to the lifting platform 10 to avoid the influence of the rotational motion of the column 22A on the lifting platform 10. At the same time, the sleeve 21A passes through the clearance hole 51, and there is a sealing structure between the sleeve 21A and the clearance hole 51. Since the sleeve 21A is a stationary structure, it is easier to set a sealing structure between two stationary structures.

[0038] In some embodiments, such as Figure 6As shown, the second type of lifting structure 20B includes a lead screw 21B, and a lifting platform 10 is sleeved on the outside of the lead screw 21B, forming a ball screw pair with the lead screw 21B. This can be understood as the lifting platform 10 having a threaded hole, which is sleeved on the outside of the lead screw 21B, and balls are present between the internal thread of the threaded hole and the external thread of the lead screw 21B. The rotation of the lead screw 21B drives the lifting platform 10 to perform lifting movements. By directly forming a ball screw pair between the lifting platform 10 and the lead screw 21B, the structure of the lifting device can be made more compact. The lead screw 21B passes through a clearance... The hole 51 has a flexible sealing structure between the lead screw 21B and the clearance hole 51. The flexible sealing structure can deform in the extension direction of the lead screw. That is, the lead screw 21B will also exert a force on the flexible sealing structure in the extension direction of the lead screw 21B during rotation. By causing the flexible sealing structure to deform in this direction, the risk of damage to the flexible sealing structure due to this force can be reduced. Optionally, the deformation of the flexible sealing structure can be elastic deformation. Optionally, the flexible sealing structure has a bellows section. The expansion and contraction of the bellows section can cause the flexible sealing structure to deform.

[0039] In some embodiments, such as Figure 1 As shown, in the extension direction of the lifting structure 20, the projections of each clamping wheel 40 on the bottom surface of the lifting platform 10 are all located within the space surrounded by the outer contour of the bottom surface of the lifting platform 10. It can be understood that each clamping wheel 40 is located directly below the lifting platform 10, thereby making the structure of the lifting device 1 more compact. Optionally, the clamping wheel 40 can slide in the direction close to or away from the transmission chain 30, thereby adjusting the clamping force applied by the clamping wheel 40 to the transmission chain 30.

[0040] In some embodiments, such as Figure 1 As shown, the lifting device 1 also includes a drive motor 61 and a first transmission structure 62. The first transmission structure 62 connects the drive motor 61 and one lifting structure 20. That is, the torque of the drive motor 61 is transmitted to one of the lifting structures 20 through the first transmission structure 62, thereby making one of the lifting structures 20 the driving member and the others the driven members, thus making the structure of the lifting device 1 more compact. The first transmission structure 62 can be a gear train, transmitting the torque of the drive motor 61 to the lifting structure 20 through gear meshing.

[0041] In some embodiments, such as Figure 7 As shown, the lifting device 1 also includes a rotating handwheel 71 and a second transmission structure 72. The second transmission structure 72 connects the rotating handwheel 71 and a lifting structure 20. It can be understood that rotating the handwheel 71 drives the lifting structure 20 to rotate, thereby... Figure 1Even if the drive motor 61 or transmission chain 30 malfunctions, the lifting device 1 can still be raised and lowered manually. For example, if the transmission chain 30 malfunctions, rotating the handwheel 71 can raise the lifting platform 10 by a certain distance, thus facilitating the maintenance and replacement of the drive motor. The second transmission structure 72 is a bevel gear pair. The driving bevel gear is connected to the rotating handwheel 71, and the driven bevel gear is connected to the lifting structure 20. The rotation axis of the driving bevel gear is parallel to the horizontal direction, thereby making the rotation axis of the rotating handwheel 71 parallel to the horizontal direction. The user can rotate the rotating handwheel 71 in a vertical plane, allowing the user to use their own weight to assist in driving the rotating handwheel 71. This makes it easier for the user to apply force when driving the rotating handwheel 71.

[0042] In some embodiments, such as Figure 1 As shown, the lifting device 1 also includes a pressure sensor 81 and a motion control component 82. The pressure sensor 81 is fixed to the lifting platform 10 and is used to contact the blocking structure. The blocking structure is located at the target rising position of the lifting platform 10. That is, the lifting platform 10 needs to rise to the target position where the optical device can work. By setting the blocking structure at the fixed surface of the target position, the pressure sensor 81 of the lifting platform 10 can come into contact with the blocking structure, thereby increasing the pressure obtained by the pressure sensor 81. The motion control component 82 is used to obtain the pressure data of the pressure sensor. When the pressure data is greater than the pressure threshold, it is considered that the pressure sensor 81 has fully come into contact with the blocking structure, thereby causing the lifting platform 10 to rise to the target position. At this time, the motion control component 82 controls the lifting structure 20 to stop moving, thereby stopping the lifting platform 10 at the target position. The motion control component 82 can also stop the lifting platform 10 by controlling the drive motor to stop working. In this state, the lifting structure 20 can be self-locked by friction through the motor brake, thereby keeping the lifting platform 10 in the target position.

[0043] In some embodiments, combined with Figure 1 and Figure 6The lifting device 1 also includes a first locking part 91, a second locking part 92, a magnetic structure 94, a Hall sensor 95, and a locking control assembly 93. The first locking part 91 is fixed to the lifting platform 10, the second locking part 92 is fixed to the fixed surface at the target lifting position, the magnetic structure 94 is fixed to the top surface of the lifting platform 10, and the Hall sensor 95 is located at the top of the lead screw 21B, with the Hall sensor 95 facing the magnetic structure 94. Optionally, the top of the lead screw 21B has a mounting platform 96, and the Hall sensor 95 is located below the mounting platform 96, with the Hall sensor 95 facing the magnetic structure 94. Directly above the magnetic structure 94, as the lifting platform 10 rises, the magnetic structure 94 gradually approaches the Hall sensor 95. Under the action of the Hall effect, the intensity of the electrical signal output by the Hall sensor 95 increases. The height of the lifting platform 10 can be determined by the intensity of the electrical signal output by the Hall sensor 95. Optionally, the mounting platform 96 is fixed to the top of the lead screw 21B and rotates together with the lead screw 21B. Optionally, the mounting platform 96 is rotatably connected to the lead screw 21B through a rotary bearing, so that the mounting platform 96 remains stationary, thereby making the electrical signal acquired by the Hall sensor 95 more accurate.

[0044] The following is an illustrative description of the process of controlling the locking state of the first locking part 91 and the second locking part 92 by the electrical signal output by the Hall sensor 95. The locking control component 93 is used to acquire the electrical signal by the Hall sensor 95. When the intensity of the electrical signal is greater than the intensity threshold, it controls the first locking part 91 and the second locking part 92 to lock. In this state, a locking force is formed between the first locking part 91 and the second locking part 92. This locking force is used to restrict the movement of the lifting platform 10 away from the target position, thereby making the lifting platform 10 more reliably fixed at the target position. When an unlocking command is received, the locking control component 93 shields the electrical signal and controls the first locking part and the second locking part to unlock. After the first locking part 91 and the second locking part 92 are unlocked, the shielding of the electrical signal is canceled. This can be understood as the lifting platform 10 lowering when needed. During descent, an unlocking command is sent to the locking control component 93. In response to this unlocking command, the locking control component 93 shields the electrical signal to prevent the first locking part 91 and the second locking part 92 from being unable to unlock if the signal strength is still greater than a strength threshold. Simultaneously, it controls the first locking part 91 and the second locking part 92 to unlock, allowing the lifting platform 10 to descend smoothly. When the lifting platform 10 moves away from the target position, the shielding of the electrical signal is lifted. That is, after the lifting platform 10 descends smoothly, the shielding of the electrical signal is lifted, so that the first locking part 91 and the second locking part 92 can still lock when the lifting platform moves to the target position again. The descent stroke of the lifting platform can be calculated by the rotation angle of the drive motor 61. When this descent stroke exceeds a stroke threshold, it is considered that the lifting platform 10 has moved away from the target position. Optionally, the locking control component 93 and the motion control component 82 can be integrated into a single unit.

[0045] By setting the first locking part 91 and the second locking part 92, the lifting platform 10 can be reliably locked at the target height. In the event of damage to the drive motor 61, the lifting platform 10 can be prevented from falling, thereby preventing damage to the optical equipment. It can also prevent the lifting platform 10 from falling and affecting the safety of maintenance personnel during maintenance. At the same time, the first locking part 91 and the second locking part 92 can also be locked during transportation, thereby reducing the impact of vibration during transportation. Figure 6 The effect of the lead screw 21B in the middle extends the service life of the lead screw 21B.

[0046] The following is combined with Figure 8 The structures of the first locking portion 91 and the second locking portion 92 will be described by way of example, such as Figure 8As shown, the first locking part 91 includes a locking motor 911, a locking cylinder 912, and a locking tongue 913. The second locking part 92 includes a lock seat 921. The locking motor 911 rotates to drive the piston of the locking cylinder 912 to extend and retract. The piston is connected to the locking tongue 913, thereby driving the locking tongue 913 to slide. Through the sliding of the locking tongue 913, it can extend into or out of the lock seat 921. When locking is required, the locking motor 911 rotates to drive the locking tongue 913 to extend into the lock seat 921. When unlocking is required, the locking motor 911 reverses to drive the locking tongue 913 to exit from the lock seat 921. The locking tongue 913 exits the lock seat 921 until it reaches the limit position, and the locking motor 911 stops rotating, thereby completing the unlocking.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A high-precision lifting device, characterized in that, The lifting device includes: Lifting platforms are used to support optical equipment; A lifting structure is provided, wherein multiple lifting structures are arranged at intervals, and each lifting structure is connected to the lifting platform. The lifting structure can drive the lifting platform to move up and down through rotational motion. A transmission chain surrounds and forms a closed structure and is connected to each of the lifting structures to drive each of the lifting structures to rotate synchronously; A pressure roller contacts the drive chain and is used to press the drive chain. A cover plate, located between the lifting platform and the pressing rollers, is used to cover each of the pressing rollers and the transmission chain, and the cover plate has clearance holes for the lifting structure to pass through; The lifting structure includes: The lifting platform is sleeved on the outside of the lead screw and forms a ball screw pair with the lead screw. The lead screw passes through the clearance hole, and a flexible sealing structure is provided between the lead screw and the clearance hole. The flexible sealing structure can deform in the extension direction of the lead screw. The first locking part is fixed to the lifting platform; The second locking part is fixed to the fixed surface at the target position of the rise, which is the target position to which the lifting platform needs to rise, and at the target position, the optical device can work; the magnetic structure is fixed to the top surface of the lifting platform. A Hall sensor is fixed to the top of the lead screw, and the Hall sensor faces the magnetic structure. The locking control component is used to control the first locking part and the second locking part to lock when the intensity of the electrical signal acquired by the Hall sensor is greater than the intensity threshold, and to block the electrical signal and control the first locking part and the second locking part to unlock when an unlocking command is received, and to cancel the blocking of the electrical signal when the lifting device moves away from the target position.

2. The lifting device according to claim 1, characterized in that, The cover plate has multiple cutouts, and each cutout is spaced apart in the direction perpendicular to the thickness of the cover plate. The perforation includes avoidance perforation and blocking perforation. In the thickness direction of the cover plate, the avoidance perforation extends along a straight line to form the avoidance hole, and the blocking perforation extends along a curve.

3. The lifting device according to claim 1 or 2, characterized in that, The lifting structure includes: Sleeve; A column is located inside the sleeve and is movably connected to the sleeve. One end of the column extends out of the sleeve and is connected to the lifting platform, and the other end of the column extends out of the sleeve and is connected to the transmission chain. The column and the sleeve form a ball screw pair, the sleeve passes through the clearance hole, and there is a sealing structure between the sleeve and the clearance hole.

4. The lifting device according to claim 1, characterized in that, In the extending direction of the lifting structure, the projections of each of the pressing wheels on the bottom surface of the lifting platform are all located within the space enclosed by the outer contour of the bottom surface.

5. The lifting device according to claim 1 or 4, characterized in that, The clamping wheel can slide in a direction that is close to or away from the drive chain.

6. The lifting device according to claim 1, characterized in that, The lifting device further includes a drive motor and a first transmission structure, wherein the first transmission structure connects the drive motor and the lifting structure.

7. The lifting device according to claim 1 or 6, characterized in that, The lifting device further includes a rotating handwheel and a second transmission structure, wherein the second transmission structure connects the rotating handwheel to the lifting structure.

8. The lifting device according to claim 1, characterized in that, The lifting device also includes: A pressure sensor is fixed to the lifting platform and is used to contact a blocking structure located at the target rising position of the lifting platform. A motion control component is used to acquire pressure data from the pressure sensor and, when the pressure data exceeds a pressure threshold, control the lifting structure to stop moving.

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