High-precision lifting device

Abstract

The invention provides a high-precision lifting device, and relates to the field of optical equipment, and the lifting device comprises a lifting platform which is used for bearing the optical equipment; the multiple lifting structures are arranged at intervals, all the lifting structures are connected with the lifting platform, and the lifting structures can drive the lifting platform to do lifting motion through rotating motion; the transmission chain surrounds to form a closed structure and is connected with the lifting structures so as to drive the lifting structures to rotate synchronously; the pressing wheel is in contact with the transmission chain and is used for pressing the transmission chain; the cover plate is located between the lifting platform and the pressing wheels and used for covering the pressing wheels and the transmission chain, and the cover plate is provided with an avoiding hole allowing the lifting structure to penetrate through. According to the lifting device, the lifting structures can synchronously move with high precision, and the influence of splashing lubricating oil or lubricating grease on optical equipment can be reduced.

Description

Technical Field

[0001] The invention relates to the field of optical equipment, and in particular to a high-precision lifting device. Background Art

[0002] In order to facilitate the transportation of the storage box of the optical device, the optical device needs to be placed on a lifting platform, and the optical device is lifted by the lifting platform when it is needed. In the relevant lifting device, multiple lifting structures are respectively supported under the lifting platform and drive the lifting platform to lift. The synchronous movement accuracy of each lifting structure in the relevant lifting device is insufficient, which may cause the lifting platform to swing and thus cause the working posture of the optical device to fail to meet the requirements. Summary of the invention

[0003] The present invention provides a high-precision lifting device for How to improve the lifting structure of the lifting device Technical issues on the accuracy of synchronous motion.

[0004] An embodiment of the present invention provides a high-precision lifting device, which includes: a lifting platform for carrying optical equipment; a lifting structure, a plurality of lifting structures are arranged at intervals, and each of the lifting structures is connected to the lifting platform, and the lifting structure can drive the lifting platform to move up and down through a rotational motion; a transmission chain, which 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 wheel, which contacts the transmission chain and is used to press the transmission chain; a cover plate, which is located between the lifting platform and the pressure wheel, and is used to cover each of the pressure wheels and the transmission chain, and the cover plate has an avoidance hole for the lifting structure to pass through.

[0005] In some embodiments, the cover plate has a plurality of hollows, and each of the hollows is spaced apart in a direction perpendicular to the thickness of the cover plate; wherein the hollows include avoidance hollows and blocking hollows, and in the thickness direction of the cover plate, the avoidance hollows extend along a straight line to form the avoidance holes, and the blocking hollows extend along a curve.

[0006] In some embodiments, the lifting structure includes: a sleeve; a column, located in the sleeve and 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; wherein the column and the sleeve form a ball screw pair, the sleeve passes through the avoidance hole, and a sealing structure is provided between the sleeve and the avoidance hole.

[0007] In some embodiments, the lifting structure includes: a screw rod, the lifting platform is sleeved on the outside of the screw rod, and forms a ball screw pair with the screw rod; wherein the screw rod passes through the avoidance hole, and a flexible sealing structure is arranged between the screw rod and the avoidance hole, and the flexible sealing structure can produce deformation in the extension direction of the screw rod.

[0008] In some embodiments, in the extension direction of the lifting structure, the projection of each of the pressing wheels on the bottom surface of the lifting platform is located within the space surrounded by the outer contour of the bottom surface.

[0009] In some embodiments, the pinch wheel can slide in a direction approaching or moving away from the transmission chain.

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

[0011] In some embodiments, the lifting device further includes a rotating hand wheel and a second transmission structure, wherein the second transmission structure connects the rotating hand wheel and one of the lifting structures.

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

[0013] In some embodiments, the lifting device also includes: a first locking part, fixed to the lifting platform; a second locking part, fixed to a fixed surface at the rising target position; a magnetic structure, fixed to the top surface of the lifting platform; a Hall sensor, fixed to the top of the screw rod, and the Hall sensor is facing the magnetic structure; a locking control component, used to obtain an electrical signal from the Hall sensor, and control the first locking part and the second locking part to lock when the intensity of the electrical signal is greater than an intensity threshold, shield the electrical signal and control the first locking part and the second locking part to unlock when an unlocking command is received, and cancel the shielding of the electrical signal when the lifting device is away from the rising target position.

[0014] An embodiment of the present invention provides a high-precision lifting device, which includes a lifting platform for carrying an optical device, and a plurality of lifting structures arranged at intervals, wherein each lifting structure is connected to the lifting platform and can drive the lifting platform to move up and down through a rotational motion; at the same time, the lifting device also includes a transmission chain connected to each lifting structure to drive each lifting structure to rotate synchronously, and a clamping wheel for clamping the transmission chain, so that each lifting structure can perform high-precision synchronous rotation through the transmission chain and the clamping wheel, and the lifting device also includes a cover plate for covering the clamping wheel and the transmission chain, that is, on the basis of lubricating the transmission chain and the clamping wheel with lubricating oil or grease, splashing lubricating oil or grease is shielded by the cover plate to prevent the splashing lubricating oil or grease from affecting the optical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a high-precision lifting device in a state where a cover plate is removed provided by 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 diagram of a cover plate and a first type of lifting structure in a high-precision lifting device provided in an embodiment of the present invention;

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

[0021] Figure 7 An assembly diagram of a lifting structure, a rotating hand wheel and a second transmission structure in a high-precision lifting device is provided for an embodiment of the present invention;

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

[0023] Description of Reference Numerals

[0024] 1. Lifting device; 10. Lifting platform; 20. Lifting structure; 20A. Lifting structure of the first type; 21A. Sleeve; 22A. Column; 20B. Lifting structure of the second type; 21B. Screw; 30. Transmission chain; 40. Pressure wheel; 50. Cover plate; 51. Avoidance hole; 52. Hollow; 521. Blocking hollow; 522. Avoiding hollow; 61. Driving motor; 62. First transmission structure; 71. Rotating hand wheel; 72. Second transmission structure; 81. Pressure sensor; 82. Motion control component; 91. First locking part; 911. Locking motor; 912. Locking electric cylinder; 913. Lock tongue; 92. Second locking part; 921. Lock seat. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The various specific technical features in the various embodiments described in the specific implementation methods 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 the present invention will not be described separately.

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

[0028] In addition, it should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the following description, the terms "first\second\..." involved are merely used to distinguish different objects, and do not indicate that the objects have the same or related points. It should be understood that the directions described by the directions nouns such as "above", "below", "inside" and "outside" involved are all directions in normal use.

[0029] In the following specific implementations, the high-precision lifting device can be used to carry any optical device, such as an optical radar, a laser rangefinder, or an 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 in combination with various embodiments.

[0030] In some embodiments, in combination Figure 1 and Figure 2 The high-precision lifting device 1 comprises: a lifting platform 10, a lifting structure 20, a transmission chain 30, a clamping wheel 40 and a cover plate 50. The lifting platform 10 is used to carry 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 arranged at intervals are connected to the lifting platform 10 to support the lifting platform 10 more reliably. Each lifting structure 20 can drive the lifting platform 10 to move up and down through rotational motion. It can be understood that the rotational motion of the lifting structure 20 can be converted into linear motion of the lifting platform 10 to drive the lifting platform 10 to move up and down. It should be noted that if the rotational motion of each lifting platform 10 is not synchronized, the lifting platform 10 will produce a yaw during the lifting motion, thereby causing the working posture of the optical device to not meet the requirements. In order to ensure the working reliability of the optical device, it is necessary to make each lifting structure 20 perform high-precision rotational motion to ensure that the positioning accuracy of the four corners of the platform after lifting into place is less than or equal to 5 points. It can be understood that the angle difference of the rotation of each lifting structure 20 in unit time needs to be within a very small angle threshold. The structure for realizing high-precision synchronous rotation of each lifting structure 20 is explained below.

[0031] The transmission chain 30 surrounds and forms a closed structure connected end to end and is connected to each lifting structure 20 to drive the lifting structures to rotate synchronously. It should be noted that mechanical transmission is required to enable each lifting structure 20 to rotate synchronously reliably and with high precision. At the same time, since the lifting structures 20 are far apart, the mechanical transmission structure needs to transmit a large span, so the mechanical transmission structure needs to be selected from belt transmission and chain transmission. Since belt transmission has slippage and deformation characteristics and cannot meet the high-precision transmission requirements, it is necessary to drive each lifting structure 20 to rotate synchronously through the transmission chain 30. Moreover, in order to prevent the loosening or shaking of the transmission chain 30 from affecting the transmission accuracy, it is also necessary to clamp the transmission chain 30 through a clamping wheel 40.

[0032] At the same time, the cover plate 50 is located between the lifting platform 10 and the pressure wheel 40, and is used to cover the pressure wheel 40 and the transmission chain 30. In order to make the transmission chain 30 have a longer service life 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 device or even enter the optical device. Therefore, it is necessary to set the cover plate 50 to cover the transmission chain 30 and the pressure wheel 40 to block the splashing lubricating oil or grease, so as to protect the optical device. 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. It is necessary to set an avoidance hole 51 for the lifting structure 20 to pass through on the cover plate 50. It should be noted that, for general equipment, lubricating oil and grease splashed onto the surface of the equipment will not affect the function of the equipment, and a small amount of lubricating oil and grease entering the equipment is unlikely to cause a malfunction of the equipment. In addition, the provision of a cover plate may also create a risk of motion interference with the lifting structure. Therefore, it is difficult for technical personnel in this field to think of the need to provide a cover plate on the transmission chain and the pressure wheel; however, the optical devices in the optical equipment have very high requirements for cleanliness, and splashing lubricating oil and grease will have a greater impact on the function of the optical equipment, thereby overcoming the technical prejudice in this field and thinking of the need to provide a cover plate 50 to prevent splashing lubricating oil or grease from affecting the optical equipment.

[0033] An embodiment of the present invention provides a high-precision lifting device, which includes a lifting platform for carrying an optical device, and a plurality of lifting structures arranged at intervals, wherein each lifting structure is connected to the lifting platform and can drive the lifting platform to move up and down through a rotational motion; at the same time, the lifting device also includes a transmission chain connected to each lifting structure to drive each lifting structure to rotate synchronously, and a clamping wheel for clamping the transmission chain, so that each lifting structure can perform high-precision synchronous rotation through the transmission chain and the clamping wheel, and the lifting device also includes a cover plate for covering the clamping wheel and the transmission chain, that is, on the basis of lubricating the transmission chain and the clamping wheel with lubricating oil or grease, splashing lubricating oil or grease is shielded by the cover plate to prevent the splashing lubricating oil or grease from affecting the optical device.

[0034] In some embodiments, the end of the lifting structure is fixed to the support surface, and the lifting structure is reliably supported by the support surface. Optionally, the cover plate has support legs, and the cover plate is supported on the support surface by the support legs, so that the cover plate can cover the transmission chain and the pressure wheel; Optionally, the support surface is concave to form a receiving cavity, and the transmission chain and the pressure wheel are both located in the receiving cavity, and the edge of the cover plate is supported on the support surface so that the cover plate can cover the transmission chain and the pressure wheel. Optionally, the cover plate is a split structure, so that the cover plate can be separated from the lifting structure, and the cover plate can be easily disassembled and assembled when the transmission chain and the pressure wheel need to be repaired or maintained.

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

[0036] In some embodiments, Figure 3 As shown, the cover plate 50 has a plurality of hollows 52, and the hollows 52 are arranged at intervals in a direction perpendicular to the thickness of the cover plate 50. By arranging the hollows 52, the weight of the cover plate 50 can be reduced, thereby facilitating the disassembly and assembly of the cover plate 50. Moreover, the hollows 52 are arranged at intervals in a direction perpendicular to the thickness of the cover plate 50, so that the cover plate 50 has sufficient blocking ability against splashing lubricating oil or grease, and the influence of the hollows 52 on the structural strength of the cover plate 50 can be reduced; wherein, as Figure 4 As shown, the hollowing 52 includes a blocking hollowing 521 and an avoiding hollowing 522. In the thickness direction of the cover plate 50, the avoiding hollowing 522 extends along a straight line to form an avoiding hole 51. The avoiding hollowing 522 is used for the lifting structure 20 to pass through. The blocking hollowing 521 extends along a curve, thereby forming a maze structure through bending and extension, so as to more effectively shield the splashing lubricating oil or grease.

[0037] In some embodiments, Figure 5 As shown, the first type of lifting structure 20A includes: a sleeve 21A and a column 22A, the sleeve 21A is sleeved in the column 22A, one end of the column 22A extends out of the sleeve 21A and is connected to the lifting platform 10, and the other end of the column 22A extends out of the sleeve and is connected to the lifting platform 10. Figure 1 The transmission chain 30 is connected in the middle, wherein the column 22A and the sleeve 21A form a ball screw pair, which can be understood as follows: the column 22A is a screw with an external thread, the sleeve 21A has an internal thread, and a ball is arranged between the external thread and the internal thread, and the ball screw pair can convert the rotational motion of the column 22A into a linear motion along the extension direction of the column 22A, wherein a rotary bearing is arranged 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, so as to avoid the influence of the rotational motion of the column 22A on the lifting platform 10, and at the same time, the sleeve 21A passes through the avoidance hole 51, and there is a sealing structure between the sleeve 21A and the avoidance hole 51. Since the sleeve 21A is a static structure, it is easier to arrange a sealing structure between the two static structures.

[0038] In some embodiments, Figure 6As shown, the second type of lifting structure 20B includes a screw rod 21B, and the lifting platform 10 is sleeved on the outside of the screw rod 21B, and forms a ball screw pair with the screw rod 21B. It can be understood that the lifting platform 10 has a threaded hole, and the threaded hole is sleeved on the outside of the screw rod 21B, and there is a ball between the internal thread of the threaded hole and the external thread of the screw rod 21B. The lifting platform 10 can be driven to perform lifting and lowering movements by rotating the screw rod 21B. By directly forming a ball screw pair between the lifting platform 10 and the screw rod 21B, the structure of the lifting device can be made more compact; wherein, the screw rod 21B passes through the avoidance Hole 51 and a flexible sealing structure is provided between the screw rod 21B and the avoidance hole 51, and the flexible sealing structure can be deformed in the extension direction of the screw rod, that is, the screw rod 21B will also exert a force on the flexible sealing structure in the extension direction of the screw rod 21B during the rotation process. By causing the flexible sealing structure to deform in this direction, the risk of damage to the flexible sealing structure due to the 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, and the flexible sealing structure can be deformed by the expansion and contraction of the bellows section.

[0039] In some embodiments, Figure 1 As shown, in the extension direction of the lifting structure 20, the projection of each clamping wheel 40 on the bottom surface of the lifting platform 10 is located in 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 a 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, Figure 1 As shown, the lifting device 1 further includes a driving motor 61 and a first transmission structure 62, wherein the first transmission structure 62 connects the driving motor 61 and a lifting structure 20, that is, the torque of the driving motor 61 is transmitted to one of the lifting structures 20 through the first transmission structure 62, so that one of the lifting structures 20 is used as an active member and the remaining lifting structures 20 are used as driven members, thereby making the structure of the lifting device 1 more compact. The first transmission structure 62 may be a gear train, and the torque of the driving motor 61 is transmitted to the lifting structure 20 through the meshing of gears.

[0041] In some embodiments, Figure 7 As shown, the lifting device 1 also includes a rotating hand wheel 71 and a second transmission structure 72. The second transmission structure 72 connects the rotating hand wheel 71 and a lifting structure 20. It can be understood that the lifting structure 20 can be driven to rotate by rotating the hand wheel 71, so that Figure 1When the driving motor 61 or the transmission chain 30 fails, the lifting device 1 can still be lifted by manual drive. For example, when the transmission chain 30 fails, the lifting platform 10 can be lifted a certain space by rotating the hand wheel 71, so as to facilitate the maintenance and replacement of the driving motor. Among them, the second transmission structure 72 is a bevel gear pair, the active bevel gear is connected to the rotating hand wheel 71, and the driven bevel gear is connected to the lifting structure 20. The rotation axis of the active bevel gear is parallel to the horizontal direction, so that the rotation axis of the rotating hand wheel 71 is parallel to the horizontal direction. The user can rotate the rotating hand wheel 71 in the vertical plane, so that the user can use his own gravity to assist the force to drive the rotating hand wheel 71 to rotate, that is, it is easier for the user to drive the rotating hand wheel 71 to rotate.

[0042] In some embodiments, 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. The pressure sensor 81 is used to contact the blocking structure, and the blocking structure is located at the rising target position of the lifting platform 10, that is, the lifting platform 10 needs to rise to the target position, at which 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 abut against the blocking structure so that the pressure obtained by the pressure sensor 81 increases; the motion control component 82 is used to obtain the pressure data of the pressure sensor, and when the pressure data is greater than the pressure threshold, it is considered that the pressure sensor 81 has fully abutted against the blocking structure, so that the lifting platform 10 rises to the target position. At this time, the motion control component 82 controls the lifting structure 20 to stop moving, so that the lifting platform 10 stops at the target position. The motion control component 82 can stop the lifting platform 10 by controlling the drive motor to stop working. In this state, the lifting structure 20 can be frictionally self-locked by the motor brake, so that the lifting platform 10 remains at the target position.

[0043] In some embodiments, in combination Figure 1 and Figure 6The lifting device 1 further includes a first locking portion 91, a second locking portion 92, a magnetic structure 94, a Hall sensor 95 and a locking control assembly 93. The first locking portion 91 is fixed to the lifting platform 10, the second locking portion 92 is fixed to the fixed surface of the lifting target position, the magnetic structure 94 is fixed to the top surface of the lifting platform 10, the Hall sensor 95 is located at the top of the screw rod 21B, and the Hall sensor 95 is directly opposite to the magnetic structure 94. Optionally, the top of the screw rod 21B has a mounting platform 96, the Hall sensor 95 is arranged below the mounting platform 96, and the Hall sensor 95 is located at 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, and 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 screw rod 21B and rotates with the screw rod 21B. Optionally, the mounting platform 96 is rotatably connected to the screw rod 21B via a rotating bearing, so that the mounting platform 96 remains stationary, and then the accuracy of the electrical signal obtained by the Hall sensor 95 is higher.

[0044] The following is an exemplary 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 obtain the electrical signal from the Hall sensor 95, and when the intensity of the electrical signal is greater than the intensity threshold, the first locking part 91 and the second locking part 92 are controlled to be locked. In this state, a locking force is formed between the first locking part 91 and the second locking part 92, and the locking force is used to limit the movement of the lifting platform 10 away from the target position, so that the lifting platform 10 is more reliably fixed to the target position; when receiving the unlocking command, the locking control component 93 shields the electrical signal and controls the first locking part and the second locking part to be unlocked, and cancels the shielding of the electrical signal after the first locking part 91 and the second locking part 92 are unlocked. It can be understood that when necessary, the lifting platform 10 is lowered When the lifting platform 10 is lowered, an unlocking instruction is sent to the locking control component 93. The locking control component 93 responds to the unlocking instruction and shields the electrical signal to prevent the locking control component 93 from being unable to unlock the first locking part 91 and the second locking part 92 when the strength of the electrical signal is still greater than the strength threshold. At the same time, the first locking part 91 and the second locking part 92 are controlled to be unlocked, so that the lifting platform 10 can be smoothly lowered. When the lifting platform 10 is far away from the rising target position, the shielding of the electrical signal is canceled, that is, after the lifting platform 10 is smoothly lowered, the shielding of the electrical signal is canceled so that the first locking part 91 and the second locking part 92 can still be locked when the lifting platform moves to the rising target position next time, wherein the descending stroke of the lifting platform can be calculated by the rotation angle of the driving motor 61. When the descending stroke is greater than the stroke threshold, it is considered that the lifting platform 10 is far away from the rising target position. Optionally, the locking control component 93 and the motion control component 82 can be integrated into a whole.

[0045] By providing the first locking portion 91 and the second locking portion 92, the lifting platform 10 can be reliably locked at the target height. In the scenario where the drive motor 61 is damaged, the lifting platform 10 can be prevented from falling, thereby preventing damage to the optical device. It can also prevent the lifting platform 10 from falling and affecting the safety of the maintenance personnel when the maintenance personnel are performing maintenance. At the same time, the first locking portion 91 and the second locking portion 92 can also be locked during transportation, thereby reducing the vibration during transportation. Figure 6 The influence of the screw rod 21B in the process is reduced, and the service life of the screw rod 21B is prolonged.

[0046] Combine the following Figure 8 The structures of the first locking portion 91 and the second locking portion 92 are exemplarily described as follows: Figure 8As shown, the first locking part 91 includes a locking motor 911, a locking cylinder 912, and a locking tongue 913, and 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 telescope, and the piston is connected to the locking tongue 913 to drive the locking tongue 913 to slide. The locking tongue 913 can be extended into the lock seat 921 or moved out of the lock seat 921 through the sliding of the locking tongue 913. 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 withdraw from the lock seat 921. The locking tongue 913 withdraws from the lock seat 921 until the limit position, and the locking motor 911 stops rotating to complete unlocking.

[0047] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A high-precision lifting device, characterized in that: The lifting device comprises: A lifting platform for carrying optical equipment; A lifting structure, wherein a plurality of the lifting structures are arranged at intervals, and each of the lifting structures is connected to the lifting platform, and the lifting structure can drive the lifting platform to move up and down through a rotational motion; A transmission chain, which 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 clamping wheel, in contact with the transmission chain, and used for clamping the transmission chain; A cover plate is located between the lifting platform and the clamping wheel, and is used to cover each of the clamping wheels and the transmission chain. The cover plate has an avoidance hole for the lifting structure to pass through.

2. The lifting device according to claim 1, characterized in that: The cover plate has a plurality of hollows, and the hollows are arranged at intervals in a direction perpendicular to the thickness of the cover plate; Wherein, the hollowing includes an avoidance hollowing and a blocking hollowing. In the thickness direction of the cover plate, the avoidance hollowing extends along a straight line to form the avoidance hole, and the blocking hollowing extends along a curve.

3. The lifting device according to claim 1 or 2, characterized in that: The lifting structure comprises: Sleeve; A column, located in the sleeve and 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; Wherein, the column and the sleeve form a ball screw pair, the sleeve passes through the avoidance hole, and a sealing structure is provided between the sleeve and the avoidance hole.

4. The lifting device according to claim 1 or 2, characterized in that: The lifting structure comprises: A screw rod, the lifting platform is sleeved on the outside of the screw rod and forms a ball screw pair with the screw rod; Wherein, the screw rod passes through the avoidance hole, and a flexible sealing structure is arranged between the screw rod and the avoidance hole, and the flexible sealing structure can be deformed in the extension direction of the screw rod.

5. The lifting device according to claim 1, characterized in that: In the extension direction of the lifting structure, the projections of the clamping wheels on the bottom surface of the lifting platform are all located in the space surrounded by the outer contour of the bottom surface.

6. The lifting device according to claim 1 or 5, characterized in that: The pressure wheel can slide in a direction approaching or away from the transmission chain.

7. The lifting device according to claim 1, characterized in that: The lifting device further comprises a driving motor and a first transmission structure, wherein the first transmission structure connects the driving motor and one of the lifting structures.

8. The lifting device according to claim 1 or 7, characterized in that: The lifting device further comprises a rotating hand wheel and a second transmission structure, wherein the second transmission structure connects the rotating hand wheel and one of the lifting structures.

9. 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 the pressure sensor is used to contact with a blocking structure, and the blocking structure is located at a rising target position of the lifting platform; The motion control component is used to obtain pressure data of the pressure sensor, and control the lifting structure to stop moving when the pressure data is greater than a pressure threshold.

10. The lifting device according to claim 4, characterized in that: The lifting device also includes: A first locking portion, fixed to the lifting platform; a second locking portion, fixed to a fixed surface at the rising target position; A magnetic structure fixed to the top surface of the lifting platform; A Hall sensor is fixed on the top of the lead screw, and the Hall sensor faces the magnetic structure; A 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 obtained by the Hall sensor is greater than an intensity threshold, shield the electrical signal and control the first locking part and the second locking part to unlock when an unlocking instruction is received, and cancel the shielding of the electrical signal when the lifting device is away from the rising target position.

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