Level adjusting structure based on belt pulley
By adopting a pulley-based leveling structure on the active shock absorbing platform, the motor drive pulley rotates synchronously with the screw, and adjusting the compression amount of the spring to automatically adjust the height of the upper plate, the problem that the transmission mechanism of the traditional active shock absorbing platform cannot take into account the connection stiffness and structural linearity, achieving higher structural stiffness and linearity, and improving the active shock absorption accuracy.
Patent Information
- Application Number
- CN202420197409.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-26
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-01-26
AI Technical Summary
The transmission mechanism of the traditional active shock absorbing platform cannot take into account the connection stiffness and structural linearity at the same time, and there is a problem of lateral vibration mode coupling into the vertical mode, which affects the active shock absorbing accuracy.
The horizontal adjustment structure based on the pulley is adopted, including the upper and lower plates arranged at upper and lower intervals, and several adjustment components connected between the upper and lower plates. Each adjustment component includes a motor, a screw seat, a screw rod, a driven pulley, a spring seat, a screw nut and a spring. The driving pulley is driven to rotate through the motor to drive the driven pulley and the screw rod to rotate simultaneously. The screw rod and the screw nut cooperate to make the spring seat move vertically, and the compression amount of the spring is adjusted to adjust the height of the upper plate.
Automatic horizontal adjustment of the active vibration-absorbing platform is realized, the connection stiffness and linearity of the structure are improved, the problem of lateral vibration mode coupling into vertical mode is solved, and the accuracy and effect of active vibration-absorbing is improved.
Smart Images
Figure CN222650527U_ABST
Abstract
Description
[Technical field]
[0001] The utility model relates to the technical field of active vibration reduction platforms, in particular to a pulley-based leveling structure. [Background technology]
[0002] Active vibration reduction technology is a technology used to reduce the vibration of mechanical systems. It offsets or reduces the vibration effect by applying control forces in opposite directions or coherent phases to the system. Through real-time monitoring and feedback adjustment, active vibration reduction technology can accurately compensate according to the vibration state of the system. This technology is widely used in the fields of automobiles, aerospace, construction engineering, and industrial machinery to improve the operating stability of the system, reduce vibration noise, and extend the life of the equipment. However, the transmission mechanism of the traditional active vibration reduction platform cannot take into account both the connection stiffness and the structural linearity at the same time, and there is a problem that the lateral vibration mode of the vibration reduction platform is coupled into the vertical mode, thus affecting the accuracy of active vibration reduction.
[0003] In view of this, it is necessary to provide a pulley-based leveling structure to overcome the above-mentioned defects. [Contents of the utility model]
[0004] The purpose of the utility model is to provide a pulley-based leveling structure, which aims to improve the transmission mechanism of a traditional active vibration reduction platform, which cannot take into account the problem of connection stiffness and structural linearity at the same time, so that it has high connection stiffness and good structural linearity, and can well solve the problem of the lateral vibration mode of the active vibration reduction platform coupling into the vertical mode.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a pulley-based leveling structure, comprising an upper plate and a lower plate spaced apart from each other and a plurality of adjustment components connected between the upper plate and the lower plate;
[0006] Each adjustment assembly includes a motor, a screw seat, a screw, a driven pulley, a driving pulley, a spring seat, a screw nut, and a spring;
[0007] The motor is fixed to the lower plate, and the output shaft is fixedly connected to the driving pulley; the screw seat is fixed to the lower plate, and one end of the screw is vertically inserted into the screw seat; the screw nut is matched and connected with the preset position of the screw, and the spring seat is fixedly connected to the screw nut; one end of the spring is connected to the upper plate, and the other end of the spring is connected to the spring seat; the driven pulley is sleeved and fixed on the screw, and is connected to the driving pulley through a synchronous belt;
[0008] The motor is used to drive the active pulley to rotate, so as to drive the driven pulley and the lead screw to rotate synchronously, so that under the cooperation of the lead screw and the lead screw nut, the spring seat moves vertically to adjust the compression amount of the spring.
[0009] In a preferred embodiment, the lower plate is provided with a fixing hole, and the screw seat extends horizontally near the side of the upper plate to form a limiting skirt; the cross-sectional area of the limiting skirt is larger than the cross-sectional area of the fixing hole, so that the limiting skirt is tightly pressed against the upper surface of the lower plate.
[0010] In a preferred embodiment, the screw seat and the driven pulley are arranged to abut against each other up and down, and are separated by a shaft sleeve sleeved on the screw.
[0011] In a preferred embodiment, two bearings mounted opposite to each other are provided in the screw seat; a first shoulder is fixedly mounted at a preset position of the screw, and the first shoulder tightly presses the inner ring of the bearing close to one end of the upper plate; the end of the screw away from the spring passes through the lower plate, and a thread is provided at the portion extending out of the lower plate, and the threaded portion of the screw extending out of the lower plate cooperates with a locking nut to fix the screw seat to the lower plate.
[0012] In a preferred embodiment, the bearing is a tapered roller bearing or an angular contact ball bearing.
[0013] In a preferred embodiment, the screw rod is also sleeved and fixed with a second shaft shoulder, and the second shaft shoulder abuts against a side of the driven pulley away from the screw rod seat.
[0014] In a preferred embodiment, a motor seat is fixed on the lower plate, and the motor is fixed on the motor seat.
[0015] In a preferred embodiment, the lower plate is provided with a guide rail fixing block, and the guide rail fixing block is fixed with a vertically arranged linear guide rail; a slider is provided on the outer side of the spring seat, and the slider is provided with a slide groove adapted to the linear guide rail; the slider cooperates with the linear guide rail through the slide groove to limit the vertical movement of the spring seat.
[0016] The utility model provides a pulley-based leveling structure, in which the upper plate is used to configure an active vibration reduction platform and a load device. When the matching sensor detects the height deviation of the upper plate, after the linear motor receives the leveling signal, the output shaft drives the active pulley to rotate, and the active pulley transmits the torque to the driven pulley through the synchronous belt. The driven pulley drives the screw rod to rotate together, and the screw rod cooperates with the screw nut to convert the rotational motion into linear motion, that is, the screw rod nut moves along the screw rod axis, and the screw nut drives the spring seat to perform vertical linear motion at the same time. The lower end of the spring also performs vertical linear motion under the drive of the spring seat, thereby realizing the adjustment of the spring compression amount, and then adjusting the height of the upper plate. Multiple groups of adjustment components work together to realize the automatic horizontal adjustment of the working panel of the active vibration reduction platform. The leveling structure has high structural stiffness in the three directions of x / y / z, that is, the structural linearity is good, which is of great help to the active control of vibration.
Brief Description of the Drawings
[0017] 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. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A three-dimensional diagram of a pulley-based leveling structure provided by the utility model;
[0019] Figure 2 for Figure 1 The pulley-based leveling structure shown is based on a perspective view of an adjustment assembly;
[0020] Figure 3 for Figure 2 A longitudinal section of the adjustment assembly shown;
[0021] Figure 4 for Figure 3 A longitudinal section of the screw seat in the adjustment assembly shown;
[0022] Figure 5 for Figure 1 The figure shows the modal test results of the pulley-based leveling structure under a certain load.
[0023] Numbers in the figure: 100, pulley-based leveling structure; 10, upper plate; 20, lower plate; 21, motor seat; 22, guide rail fixing block; 23, linear guide; 24, slider; 30, adjustment assembly; 31, motor; 32, screw seat; 321, limiting skirt; 322, bearing; 33, screw; 34, driven pulley; 35, driving pulley; 36, spring seat; 37, screw nut; 38, spring; 39, synchronous belt; 40, locking nut. [Specific implementation method]
[0024] In order to make the purpose, technical solution and beneficial technical effect of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining the utility model, and are not intended to limit the utility model.
[0025] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.
[0026] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.
[0027] In an embodiment of the utility model, a pulley-based leveling structure 100 is provided, which is used in conjunction with a displacement sensor and a control system to achieve automatic height adjustment and automatic level adjustment of an active vibration reduction platform under different loads. A load device is configured above the active vibration reduction platform. Due to eccentricity of the load of the device or replacement of the load device, the height and level of the active vibration reduction platform will be offset. In order to optimize the active vibration reduction effect, the leveling structure needs to be used for leveling.
[0028] like Figure 1 and Figure 2 As shown, the pulley-based leveling structure 100 includes an upper plate 10 and a lower plate 20 spaced apart from each other and a plurality of adjustment components 30 connected between the upper plate 10 and the lower plate 20 .
[0029] In this embodiment, the number of adjustment components 30 can be three or four groups, which are arranged between the upper plate 10 and the lower plate 20 in an equilateral triangle or rectangle. Among them, the upper plate 10 can be reused as the working panel of the active vibration reduction platform, or the working panel of the active vibration reduction platform can be reused as the upper plate 10 of the level adjustment mechanism. That is, the lower plate 20 is placed on the ground to support the entire level adjustment mechanism. The upper plate 10 is the working panel of the active vibration reduction platform, which is used to support the load equipment.
[0030] like Figure 3 and Figure 4 As shown, each adjustment assembly 30 includes a motor 31 , a screw seat 32 , a screw 33 , a driven pulley 34 , a driving pulley 35 , a spring seat 36 , a screw nut 37 , and a spring 38 .
[0031] Specifically, the motor 31 is fixed on the lower plate 20, and the output shaft is fixedly connected to the driving pulley 35. A motor seat 21 is fixed on the lower plate 20, and the motor 31 is fixed on the motor seat 21.
[0032] The screw seat 32 is fixed on the lower plate 20, and one end of the screw 33 is vertically inserted into the screw seat 32 to form a fixed end. The screw seat 32 is matched with one end of the screw 33, so that the screw 33 can be rotatably arranged in the screw seat 32. The screw seat 32 can provide support for the screw 33 to prevent the screw 33 from moving horizontally, and will not affect the rotation of the screw 33 around its own central axis.
[0033] The lower plate 20 is provided with a fixing hole (not shown in the figure), and the screw seat 32 extends horizontally on one side close to the upper plate 10 to form a limiting skirt 321. The cross-sectional area of the limiting skirt 321 is larger than the cross-sectional area of the fixing hole, so that the limiting skirt 321 is tightly pressed against the upper surface of the lower plate 20, thereby limiting the fixing of the screw seat 32 on the lower plate 20 in the vertical direction.
[0034] Further, such as Figure 4 As shown, two bearings 322 mounted opposite to each other are arranged in the screw seat 32. In this embodiment, the bearings 322 are tapered roller bearings or angular contact ball bearings.
[0035] Specifically, a first shoulder (not shown in the figure) is sleeved and fixed at a preset position of the screw rod 33, that is, the first shoulder forms a sheet-like protrusion structure relative to the screw rod 33. The first shoulder is tightly pressed against the inner ring of the bearing 322 near one end of the upper plate 10. The end of the screw rod 33 away from the spring 38 passes through the lower plate 20, and a thread is provided at the part extending from the lower plate 20, and the threaded part of the screw rod 33 extending from the lower plate 20 cooperates with the locking nut 40 to fix the screw rod seat 32 on the lower plate 20, and the screw rod 33 has only one degree of freedom in the Rz direction, that is, the degree of freedom to rotate around its own central axis.
[0036] In the embodiment of the utility model, the driven pulley 34 is sleeved and fixed on the screw rod 33, and the driven pulley 34 is connected to the driving pulley 35 through a synchronous belt 39. The screw rod seat 32 is arranged in abutment with the driven pulley 34 up and down, and is separated by a shaft sleeve (not shown) sleeved on the screw rod 33.
[0037] The driven pulley 34 is connected to the screw rod 33 by a shaft shoulder and a screw to limit the axial and radial directions of the screw rod 33. That is, the screw rod 33 is also sleeved with a second shaft shoulder (not shown in the figure), that is, the second shaft shoulder forms a sheet-like protrusion structure relative to the screw rod 33. The second shaft shoulder abuts against the side of the driven pulley 34 away from the screw rod seat 32, thereby limiting the radial direction of the driven pulley 34.
[0038] The screw nut 37 is connected with the preset position of the screw 33, and the spring seat 36 is fixedly connected with the screw nut 37. One end of the spring 38 is connected to the upper plate 10, and the other end of the spring 38 is connected to the spring seat 36. Specifically, the lower end of the spring 38 is connected to the upper end of the spring seat 36 through the hole-shaft matching, and is laterally limited, and the upper end of the spring 38 is also connected to the limiting hole of the upper plate 10 through the hole-shaft matching.
[0039] In one embodiment, the lower plate 20 is provided with a guide rail fixing block 22, and a vertically arranged linear guide rail 23 is fixed to the guide rail fixing block 22. A slider 24 is provided on the outer side of the spring seat 36, and the slider 24 is provided with a slide groove (not shown in the figure) adapted to the linear guide rail 23. The slider 24 cooperates with the linear guide rail 23 through the slide groove to limit the vertical movement of the spring seat 36.
[0040] The principle of the utility model is as follows: the motor 31 is used to drive the active pulley 35 to rotate, so as to drive the driven pulley 34 to rotate synchronously with the screw 33, so that the spring seat 36 moves vertically under the cooperation of the screw 33 and the screw nut 37 to adjust the compression of the spring 38. In conjunction with the leveling control system, the height and level of the active shock absorber work surface can be automatically adjusted quickly and efficiently, thereby improving the adaptability of the active shock absorber to different loads and the conversion efficiency.
[0041] like Figure 5 As shown, the basic frame structure of the active vibration reduction platform is composed of four groups of adjustment components 30. From the modal test results under a certain load, it can be seen that the basic frame mode is clearly distinguishable, which proves that it has good structural linearity.
[0042] In summary, the pulley-based leveling structure 100 provided by the utility model, the upper plate 10 is used to configure the active vibration reduction platform and the load device. When the matching sensor detects the height deviation of the upper plate 10, after the linear motor 31 receives the leveling signal, the output shaft drives the active pulley 35 to rotate, the active pulley 35 transmits the torque to the driven pulley 34 through the synchronous belt 39, the driven pulley 34 drives the screw rod 33 to rotate together, the screw rod 33 cooperates with the screw nut 37 to convert the rotational motion into linear motion, that is, the screw nut 37 moves along the axial direction of the screw rod 33, and the screw nut 37 drives the spring seat 36 to make a vertical linear motion at the same time. The lower end of the spring 38 also makes a vertical linear motion under the drive of the spring seat 36, thereby realizing the adjustment of the compression amount of the spring 38, and then adjusting the height of the upper plate 10. Multiple groups of adjustment components 30 work together, so as to realize the automatic horizontal adjustment of the working panel of the active vibration reduction platform. The leveling structure has high structural stiffness in the x / y / z directions, that is, the structural linearity is good, which is of great help to the active control of vibration.
[0043] The present invention is not limited to what is described in the specification and implementation modes, and therefore, additional advantages and modifications can be easily realized by those familiar with the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.
Claims
1. A pulley-based leveling structure, characterized in that: It includes an upper plate and a lower plate spaced apart from each other and a plurality of adjustment components connected between the upper plate and the lower plate; Each adjustment assembly includes a motor, a screw seat, a screw, a driven pulley, a driving pulley, a spring seat, a screw nut, and a spring; The motor is fixed to the lower plate, and the output shaft is fixedly connected to the driving pulley; the screw seat is fixed to the lower plate, and one end of the screw is vertically inserted into the screw seat; the screw nut is matched and connected with the preset position of the screw, and the spring seat is fixedly connected to the screw nut; one end of the spring is connected to the upper plate, and the other end of the spring is connected to the spring seat; the driven pulley is sleeved and fixed on the screw, and is connected to the driving pulley through a synchronous belt; The motor is used to drive the active pulley to rotate, so as to drive the driven pulley and the lead screw to rotate synchronously, so that under the cooperation of the lead screw and the lead screw nut, the spring seat moves vertically to adjust the compression amount of the spring.
2. The pulley-based leveling structure according to claim 1, characterized in that: The lower plate is provided with a fixing hole, and the screw seat extends horizontally near the side of the upper plate to form a limiting skirt; the cross-sectional area of the limiting skirt is larger than the cross-sectional area of the fixing hole, so that the limiting skirt is tightly pressed against the upper surface of the lower plate.
3. The pulley-based leveling structure according to claim 1, characterized in that: The screw seat is disposed in upper and lower contact with the driven pulley and is separated by a shaft sleeve sleeved on the screw.
4. The pulley-based leveling structure according to claim 3, characterized in that: Two bearings mounted opposite to each other are arranged in the screw seat; a first shaft shoulder is fixedly mounted at a preset position of the screw, and the first shaft shoulder tightly presses the inner ring of the bearing close to one end of the upper plate; the end of the screw away from the spring passes through the lower plate, and a thread is arranged at the part extending out of the lower plate, and the threaded part of the screw extending out of the lower plate cooperates with a locking nut to fix the screw seat to the lower plate.
5. The pulley-based leveling structure according to claim 4, characterized in that: The bearing is a tapered roller bearing or an angular contact ball bearing.
6. The pulley-based leveling structure according to claim 3, characterized in that: The screw rod is also sleeved and fixed with a second shaft shoulder, and the second shaft shoulder abuts against a side of the driven pulley away from the screw rod seat.
7. The pulley-based leveling structure according to claim 1, characterized in that: A motor seat is fixed on the lower plate, and the motor is fixed on the motor seat.
8. The pulley-based leveling structure according to claim 1, characterized in that: The lower plate is provided with a guide rail fixing block, and the guide rail fixing block fixes a vertically arranged linear guide rail; a slider is provided on the outer side of the spring seat, and the slider is provided with a slide groove adapted to the linear guide rail; the slider cooperates with the linear guide rail through the slide groove to limit the vertical movement of the spring seat.