High-precision guide lifting device

Abstract

The utility model provides a high-precision guide lifting device, which is applied to the technical field of lifting machines and is characterized in that a guide post is arranged on a support frame of the lifting device, so that a top plate in the support frame moves along the guide post in the lifting process, and a limiting mechanism is arranged at the lifting upper and lower limit positions of the top plate; meanwhile, a driving motor of the guide lifting device is connected with a control mechanism, and when the top plate moves to the limiting mechanism at the upper and lower limit positions, the control mechanism controls the driving motor to stop so as to control accurate lifting of the top plate; compared with the design of a lifting system with gears, cables and chains, the lifting system has higher precision, and can ensure the lifting consistency and stability of the top plate.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a high-precision guiding lifting device. Background Art

[0002] Aging test is a part of reliability testing. It is a process of simulating the various factors involved in the actual use of the product to strengthen the corresponding conditions of the product aging test. It mainly uses various gold test devices to simulate the high temperature, low temperature, high humidity, low humidity and temperature changes in the climate environment, accelerates the failure of the product in the use environment, and verifies whether it has achieved the expected quality goals in R&D, design, and manufacturing, so as to evaluate the product as a whole and determine the product reliability life.

[0003] UV aging test is a type of aging test. It uses fluorescent UV lamps as light sources to simulate UV radiation and condensation in natural light to accelerate the weather resistance test of materials to obtain the results of material weather resistance. UV aging test can reproduce the damage caused by sunlight, rain and dew. The equipment conducts the test by exposing the material to be tested in a controlled interactive cycle of sunlight and moisture while increasing the temperature. The test equipment uses UV fluorescent lamps to simulate sunlight, and can also simulate the influence of moisture by condensation or spraying. It is used to evaluate changes in materials in terms of color change, gloss, cracks, blistering, catalysis, oxidation, etc.

[0004] In the process of UV aging test, the control of radiation intensity is particularly important. The control of radiation intensity can be achieved by controlling the intensity of the light source and the distance between the sample and the light source. Since small distance fluctuations will produce large changes in radiation intensity, the lifting accuracy of the device that controls the height of the sample is particularly important.

[0005] There are many types of lifting devices on the market, such as devices that use cable tension for lifting, devices that use chain sprockets for lifting, devices that use gear racks for lifting, devices that use cylinders for lifting, devices that use hydraulics for lifting, and devices that use nut-screw pairs for lifting. Devices that use nut-screw pairs for lifting generally use a pair of nut-screw pairs for lifting, without guide devices, unlimited position protection devices, and the motor generally uses ordinary motors for power input. Under this premise, how to use high-precision lifting devices with limited position devices is an urgent technical issue in the industry.

[0006] Based on this, a high-precision guide lifting device with a limiting mechanism and a guide column is needed to solve the above problems. Utility Model Content

[0007] The purpose of the utility model is to provide a high-precision guide lifting device, comprising:

[0008] A support frame, the support frame comprising a bottom plate and a top plate;

[0009] A guide column, the upper end of which passes through the through hole of the top plate, and the lower end of which is fixedly connected to the bottom plate;

[0010] A transmission mechanism, the transmission mechanism comprising a screw rod, a transmission shaft and a drive motor;

[0011] A limit mechanism and a control mechanism, wherein the limit mechanism comprises a limit switch; when the top plate moves to the limit switch, the control mechanism controls the drive motor to stop, thereby allowing the top plate to move within the limit range of the limit switch.

[0012] Preferably, a universal wheel set is connected below the bottom plate.

[0013] Furthermore, the number of the guide posts and the screw rods is 4, and the guide posts and the screw rods are arranged at the four corners of the support frame.

[0014] Preferably, a linear bearing is provided on the guide column.

[0015] Furthermore, the transmission device also includes a reducer, which is fixed to the base plate; the corners of the transmission shaft are connected through the reducer, and the screw rod is connected to the reducer.

[0016] Preferably, the transmission device further includes a plum blossom coupling, and the transmission shaft and the reducer are connected via the plum blossom coupling.

[0017] Preferably, the limit switch includes an upper limit switch and a lower limit switch; the upper limit switch and the lower limit switch are arranged on the screw rod, and the upper limit switch is located above the top plate, and the lower limit switch is located below the bottom plate.

[0018] Furthermore, a limit block is abutted against the upper limit switch, the limit block is fixedly connected to the screw rod, and the upper limit switch is movably connected to the screw rod; when the top plate lifts the upper limit switch to the limit position, the upper limit switch sends a signal to the control mechanism to control the top plate to stop rising.

[0019] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0020] First, the utility model provides additional support and restraint for the upper and lower platforms through the guide column, preventing the top plate from swinging and tilting unnecessarily during the lifting process; this is essential to maintain the horizontal state and stability of the lifting device, especially when carrying uneven loads; in addition, the guide column can ensure that the platform moves along a predetermined path during the lifting process, reducing deviations; the guide column can reduce direct friction between the platform and other components, reduce wear, and increase the service life of the system. The guide column is usually made of wear-resistant materials and can withstand frequent lifting operations.

[0021] Secondly, the transmission shaft of the utility model is connected to the reducer through a plum blossom coupling, which not only realizes the transmission of power, but also adopts an aluminum material with a certain elasticity to compensate for the deviation of the shaft and buffer the impact.

[0022] Third, the utility model realizes the upper and lower limits of the bottom plate through the cooperation of the limit mechanism and the control mechanism; the limit mechanism can prevent the top plate from exceeding the designed range of motion, thereby avoiding damage to the mechanical structure and potential safety risks; when the top plate reaches the upper or lower limit, the control mechanism will immediately send a signal to stop the drive motor to prevent further movement of the top plate; the limit mechanism can ensure that the platform can accurately stop at the predetermined position in each operation, thereby improving the accuracy and consistency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a front view of an embodiment of the lifting device of the utility model;

[0025] Figure 2 It is a schematic diagram of the structural principle of an embodiment of the lifting device of the utility model.

[0026] 1. Support frame; 11. Top plate; 12. Bottom plate; 2. Guide column; 21. Linear bearing; 3. Transmission mechanism; 31. Screw rod; 32. Transmission shaft; 33. Servo motor; 34. Transmission shaft reducer; 35. Lifting reducer; 36. Plum blossom coupling; 4. Limit mechanism; 41. Upper limit switch; 42. Lower limit switch; 43. Limit block; 5. Universal wheel set. DETAILED DESCRIPTION

[0027] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0028] The following describes the implementation methods of the present invention through specific concrete examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The lifting devices in the prior art rely on a single mechanical structure or guide rail to provide stability, which may cause swings when the load is unbalanced or offset. In addition, some lifting devices may lack precise limit control, which may cause the platform to exceed the predetermined range. How to provide a lifting device with high stability and high precision has become an urgent problem to be solved in the industry.

[0030] Based on this, the embodiment of this specification proposes a high-precision guide lifting device solution: Figure 1-Figure 2 The figure shows a schematic diagram of the structure of the lifting device of the first embodiment of the utility model, the lifting device includes a support frame 1, a guide column 2, a transmission mechanism 3, a limit mechanism 4 and a control mechanism; the support frame 1 includes a bottom plate 12 and a top plate 11, the support frame 1 is used to support the entire lifting device, the support frame 1 is assembled from 4040 aluminum profiles, and the support frame 1 is fixed by angle brackets and ground anchors; the upper end of the guide column 2 passes through the through hole of the top plate 11, and the lower end is fixed to the bottom plate 12 by a bushing and bolts; the transmission mechanism 3 includes a screw rod 31, a transmission shaft 32 and a drive motor; the limit mechanism 4 includes a limit switch; when the top plate 11 moves to the limit switch, the control mechanism controls the drive motor to stop, so that the top plate 11 moves within the limit range of the limit switch.

[0031] In this solution, through the guide column 2, the platform can obtain better support during the lifting process, reduce swinging and tilting, and ensure stable operation of the platform; the guide column 2 can ensure that the platform moves smoothly along the predetermined path, improve the overall accuracy, and is suitable for scenarios requiring high-precision operations; and the cooperation of the limit mechanism 4 and the control mechanism can ensure that the platform stops in time when it reaches the upper limit or lower limit, avoiding mechanical damage and safety accidents.

[0032] In a preferred embodiment, a universal wheel set 5 is connected below the base plate 12. There are four universal wheel sets 5 distributed at the four corners of the lower surface of the base plate 12, so that the entire lifting device can be moved in any direction; the universal wheel set 5 can be disassembled and assembled according to needs.

[0033] In this solution, the universal wheel set 5 can realize all-round movement of the guide lifting device, including front and back, left and right, and rotational movement, so that the guide lifting device can flexibly adjust its position in a small space; in the laboratory, the equipment using the universal wheel set 5 can easily adjust its position, optimize the layout of the experimental space, and facilitate the placement of the guide lifting device.

[0034] In a preferred embodiment, Figure 2 As shown, there are 4 guide columns 2 and screw rods 31, which are arranged at the four corners of the support frame 1. Since the top plate 11 is raised and lowered in the vertical height, the screw rods 31 and the guide columns 2 should be evenly arranged relative to the top plate 11 and the bottom plate 12 to facilitate the up and down movement of the top plate 11.

[0035] In this solution, by arranging screw rods 31 at the four corners of the platform, the load on the platform can be evenly distributed; the screw rods 31 at each corner jointly bear the weight, avoiding single-point overload, reducing stress concentration on the platform, and extending the service life of the equipment. The design of the four-corner screw rods 31 provides good support and restraint to prevent the platform from tilting or swinging during the lifting process.

[0036] In a preferred embodiment, a linear bearing 21 is provided on the guide column 2, and the guide column 2 is fixedly connected to the base plate 12 and connected to the linear bearing 21; the linear bearing 21 is fixedly connected to the top plate 11 by bolts, and the top plate 11 is fixedly connected to the nut and the linear bearing 21.

[0037] In this solution, when the linear bearing 21 runs on the guide column 2, it can provide smooth, jitter-free linear motion for the top plate 11, avoiding jamming and vibration caused by uneven friction; in addition, the linear bearing 21 can also withstand large radial and axial loads and is suitable for heavy-load occasions.

[0038] In a preferred embodiment, Figure 2 As shown, the transmission device also includes a reducer, which is fixed to the base plate 12; the reducer includes a transmission reducer 34 and a lifting reducer 35, the corners of the transmission shaft 32 are connected through the transmission reducer 34, and the screw rod 31 is connected to the lifting reducer 35; in this embodiment, the drive motor is a servo motor 33, which is connected to the transmission shaft 32 in two directions through a transmission reducer 34, and is respectively connected to the screw rods 31 at the four corners through two transmission reducers 34.

[0039] In this solution, the power of the servo motor 33 is transmitted to the screw rod 31 through the transmission reducer 34, which can ensure the synchronous lifting and lowering of the four screw rods 31 and avoid tilting or imbalance problems caused by asynchrony; and the lifting reducer 35 can convert the high speed of the servo motor 33 into a lower speed, while increasing the torque output, which is especially important for driving heavier loads because the servo motor 33 usually has a higher speed but lower torque; and the transmission reducer 34 and the lifting can refine the movement of the servo motor 33 so that each rotation unit corresponds to a smaller linear movement distance, thereby improving the positioning accuracy of the screw rod 31; in addition, the servo motor 33 has a high-precision position control capability and cooperates with the control mechanism to achieve closed-loop control

[0040] In a preferred embodiment, the transmission device also includes a plum blossom coupling 36, and the transmission shaft 32 and the reducer are connected through the plum blossom coupling 36; the plum blossom coupling 36 is used to connect the servo motor 33 and the transmission shaft 32, the transmission shaft 32 and the transmission reducer 34, and the transmission shaft 32 and the lifting reducer 35; the transmission reducer 34 is fixedly connected to the base plate 12 by bolts, and is connected to the transmission shaft 32 through the plum blossom coupling 36, which plays the role of transmitting power and reducing speed; the transmission shaft 32 is connected to the lifting reducer 35 and the transmission reducer 34 through the plum blossom coupling 36, which plays the role of power transmission.

[0041] In this solution, since there is an elastomer in the middle of the plum blossom coupling 36, it can absorb the vibration and impact in the transmission shaft 32 and the reducer, reducing the impact and wear on the transmission mechanism 3; the plum blossom coupling 36 can also compensate for slight alignment errors between shafts, including radial, angular and axial errors, which helps to reduce the precision requirements of the equipment during installation and operation; in addition, the plum blossom coupling 36 has a high transmission efficiency and can effectively transmit the power of the servo motor 33 to the reducer and the screw 31.

[0042] In a preferred embodiment, the limit switch includes an upper limit switch 41 and a lower limit switch 42; the upper limit switch and the lower limit switch are arranged on the screw rod 31, and the upper limit switch is located above the top plate 11, and the lower limit switch is located below the bottom plate 12; during the operation of the device, when the top plate 11 touches the lower limit switch 42 or the limit block 43 touches the upper limit switch 41, that is, when the top plate 11 reaches the set lower limit or upper limit, the control system will control the servo motor 33 to stop rotating.

[0043] Furthermore, the upper limit switch abuts against a limit block 43, the limit block 43 is fixedly connected to the screw rod 31, and the upper limit switch 41 is movably connected to the screw rod 31; when the top plate 11 lifts the upper limit switch to the limit position, the upper limit switch 41 sends a signal to the control mechanism to control the top plate 11 to stop rising.

[0044] In this solution, the upper limit position of the top plate 11 is made more accurate by setting the limit block 43, and the upper limit switch 41 can provide accurate upper and lower limit position signals to ensure that the platform stops at a predetermined position.

[0045] In addition, under the spirit of the utility model, the lifting device of the utility model can also add new variations on the basis of the above embodiments, for example, the universal wheel set 5 can be set on the top plate 11, so that the whole device is placed upside down, and the other components and the connection methods between the components are the same as the above embodiments of the utility model, and will not be repeated here due to space reasons. However, it should be understood that these components and the connection methods between the components can be introduced into the variation as equivalent embodiments.

[0046] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A high-precision guide lifting device, characterized in that: include: A support frame, the support frame comprising a bottom plate and a top plate; A guide column, the upper end of which passes through the through hole of the top plate, and the lower end of which is fixedly connected to the bottom plate; A transmission mechanism, the transmission mechanism comprising a screw rod, a transmission shaft and a drive motor; A limit mechanism and a control mechanism, wherein the limit mechanism comprises a limit switch; when the top plate moves to the limit switch, the control mechanism controls the drive motor to stop, thereby allowing the top plate to move within the limit range of the limit switch.

2. The high-precision guide lifting device according to claim 1, characterized in that: A universal wheel set is connected below the bottom plate.

3. The high-precision guide lifting device according to claim 1, characterized in that: The number of the guide posts and the screw rods is 4, and the guide posts and the screw rods are arranged at the four corners of the support frame.

4. The high-precision guide lifting device according to claim 3 is characterized in that: A linear bearing is arranged on the guide column.

5. The high-precision guide lifting device according to claim 1, characterized in that: The transmission mechanism also includes a reducer, which is fixed to the base plate; the corners of the transmission shaft are connected through the reducer, and the screw rod is connected to the reducer.

6. The high-precision guide lifting device according to claim 5, characterized in that: The transmission mechanism also includes a plum blossom coupling, and the transmission shaft and the reducer are connected through the plum blossom coupling.

7. The high-precision guide lifting device according to claim 1, characterized in that: The limit switch comprises an upper limit switch and a lower limit switch; the upper limit switch and the lower limit switch are arranged on the screw rod, and the upper limit switch is located above the top plate, and the lower limit switch is located below the bottom plate.

8. The high-precision guide lifting device according to claim 7, characterized in that: The upper limit switch is abutted against a limit block, the limit block is fixedly connected to the screw rod, and the upper limit switch is movably connected to the screw rod; when the top plate lifts the upper limit switch to the limit position, the upper limit switch sends a signal to the control mechanism to control the top plate to stop rising.

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