Level adjusting structure based on bevel gear

Abstract

The utility model discloses a levelness adjusting structure based on bevel gears. The levelness adjusting structure comprises an upper plate, a lower plate and a plurality of adjusting assemblies. Each adjusting assembly comprises a motor, a radial bearing, a lead screw, a driven bevel gear, a driving bevel gear, a spring seat, a lead screw nut and a spring; the motor is fixedly connected with the driving bevel gear; a fixing hole is formed in the lower plate, the radial bearing is fixed in the fixing hole, and one end of the lead screw is inserted and tightly matched in the radial bearing; the lead screw nut is matched and connected with a preset part of the lead screw, and the spring seat is fixedly connected with the lead screw nut; the spring is connected to the upper plate and the spring seat; the driven bevel gear is fixedly arranged on the lead screw in a sleeving mode and connected with the driving bevel gear in an engaged mode. According to the utility model, a plurality of groups of adjusting components act synergistically, so that the automatic horizontal adjustment of the working panel of the active vibration reduction platform can be realized, and the working panel has very high structural rigidity in x / y / z directions, namely, good structural linearity degree, which is greatly helpful for active control of vibration.

Description

[Technical field]

[0001] The utility model relates to the technical field of active vibration reduction platforms, in particular to a leveling structure based on bevel gears. [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 leveling structure based on bevel gears to overcome the above-mentioned defects. [Utility Model Content]

[0004] The purpose of the utility model is to provide a leveling structure based on bevel gears, aiming 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 leveling structure based on bevel gears, 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 radial bearing, a lead screw, a driven bevel gear, a driving bevel gear, a spring seat, a lead screw nut, and a spring;

[0007] The motor is fixed to the lower plate, and the output shaft is fixedly connected to the active bevel gear; the lower plate is provided with a fixing hole, the radial bearing is fixed in the fixing hole, one end of the screw rod is vertically inserted and tightly fitted in the radial bearing; the screw rod nut is matched and connected with the preset position of the screw rod, and the spring seat is fixedly connected to the screw rod 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 bevel gear is sleeved and fixed on the screw rod, and is meshed and connected with the active bevel gear;

[0008] The motor is used to drive the active bevel gear to rotate, so as to drive the driven bevel gear and the screw to rotate synchronously, so that under the cooperation of the screw and the screw nut, the spring seat moves vertically to adjust the compression amount of the spring.

[0009] In a preferred embodiment, the fixing hole includes a first step and a second step that are coaxially arranged; the second step is located on the side away from the upper plate, and the cross-sectional area of ​​the second step is smaller than the cross-sectional area of ​​the first step; the outer ring of the radial bearing is interference fit in the second step.

[0010] In a preferred embodiment, the screw rod is also sleeved with a thrust bearing, the outer side of the thrust bearing is also sleeved with a bearing sleeve, and the outer side of the bearing sleeve is installed on the first step; the driven bevel gear is pressed onto one end of the thrust bearing close to the upper plate.

[0011] In a preferred embodiment, a limiting groove is formed at one end of the screw rod away from the spring, and a locking screw is provided in the limiting groove; the locking screw is used to lock the screw rod to the inner ring of the radial bearing and limit the radial bearing on the lower plate.

[0012] In a preferred embodiment, a motor bracket is fixed on the lower plate, and the motor is fixed on the motor bracket.

[0013] In a preferred embodiment, 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.

[0014] The utility model provides a leveling structure based on bevel gears. 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, the linear motor receives a leveling signal, and the output shaft drives the active bevel gear to rotate. The active bevel gear transmits the torque to the driven bevel gear. The driven bevel gear drives the screw to rotate together. The screw and the screw nut cooperate to convert the rotational motion into linear motion, that is, the screw nut moves along the axial direction of the screw, 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 adjusting the spring compression amount and then adjusting the height of the upper plate. Multiple groups of adjustment components work together to achieve 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

[0015] 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.

[0016] Figure 1 A three-dimensional diagram of the leveling structure based on bevel gears provided by the utility model;

[0017] Figure 2 for Figure 1 The bevel gear based leveling structure shown is based on a perspective view of an adjustment assembly;

[0018] Figure 3 for Figure 2 A longitudinal section of the adjustment assembly shown;

[0019] Figure 4 for Figure 1 The figure shows the modal test results of the bevel gear-based leveling structure under a certain load.

[0020] Numbers in the figure: 100, leveling structure based on bevel gear; 10, upper plate; 20, lower plate; 201, fixing hole; 21, motor bracket; 22, guide rail fixing block; 23, linear guide; 24, slider; 30, adjustment assembly; 31, motor; 32, radial bearing; 33, lead screw; 34, driven bevel gear; 35, driving bevel gear; 36, spring seat; 37, lead screw nut; 38, spring; 39, thrust bearing; 391, bearing sleeve; 40, locking screw. [Specific implementation method]

[0021] 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.

[0022] 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.

[0023] 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.

[0024] In an embodiment of the utility model, a leveling structure 100 based on bevel gears 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.

[0025] like Figure 1-Figure 3 As shown, the bevel gear-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 .

[0026] 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.

[0027] like Figure 3 As shown, each adjustment assembly 30 includes a motor 31 , a radial bearing 32 , a screw 33 , a driven bevel gear 34 , a driving bevel gear 35 , a spring seat 36 , a screw nut 37 , and a spring 38 .

[0028] Specifically, the motor 31 is fixed on the lower plate 20, and the output shaft is fixedly connected to the driving bevel gear 35. The motor bracket 21 is fixed on the lower plate 20, and the motor 31 is fixed on the motor bracket 21. The driven bevel gear 34 is sleeved and fixed on the screw rod 33, and is meshed with the driving bevel gear 35.

[0029] The lower plate 20 is provided with a fixing hole 201, in which the radial bearing 32 is fixed, and one end of the screw rod 33 is vertically inserted and tightly fitted in the radial bearing 32. The fixing hole 201 includes a first step and a second step coaxially arranged. The second step is located on the side away from the upper plate 10, and the cross-sectional area of ​​the second step is smaller than the cross-sectional area of ​​the first step. The outer ring of the radial bearing 32 is interference-fitted in the second step, thereby fixing the radial bearing 32 in the lower plate 20.

[0030] Furthermore, the screw rod 33 is also sleeved with a thrust bearing 39, and the outer side of the thrust bearing 39 is also sleeved with a bearing sleeve 391, and the outer side of the bearing sleeve 391 is installed on the first step. The driven bevel gear 34 is pressed on one end of the thrust bearing 39 close to the upper plate 10.

[0031] Specifically, Figure 3 As shown, a limiting groove is provided at one end of the screw rod 33 away from the spring 38, and a locking screw 40 is arranged in the limiting groove. The locking screw 40 is used to lock the screw rod 33 on the inner ring of the radial bearing 32 and limit the radial bearing 32 on the lower plate 20.

[0032] Therefore, the X and Y degrees of freedom of the screw rod 33 are restricted by the axial thrust bearing 39 and the radial bearing 32, so that the screw rod 33 has only one degree of freedom in the Rz direction, that is, the freedom of rotation around the axis, so that it has very high structural stiffness in the x / y / z directions, that is, the structural linearity is good, so as to ensure the high stiffness and linearity of the entire transmission structure, avoid serious modal coupling of the active vibration reduction platform, and bring difficulties to active vibration control.

[0033] The screw nut 37 is connected with the preset position of the screw 33. 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.

[0034] 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.

[0035] The principle of the utility model is as follows: the motor 31 is used to drive the active bevel gear 35 to rotate, so as to drive the driven bevel gear 34 and the screw rod 33 to rotate synchronously, so that the spring seat 36 moves vertically under the cooperation of the screw rod 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 working surface can be automatically adjusted quickly and efficiently, thereby improving the adaptability of the active shock absorber to different loads and the conversion efficiency.

[0036] like Figure 4 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.

[0037] In summary, the utility model provides a leveling structure 100 based on bevel gears, and 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 bevel gear 35 to rotate, and the active bevel gear 35 transmits the torque to the driven bevel gear 34, and the driven bevel gear 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 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.

[0038] 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 leveling structure based on bevel gears, 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 radial bearing, a lead screw, a driven bevel gear, a driving bevel gear, a spring seat, a lead screw nut, and a spring; The motor is fixed to the lower plate, and the output shaft is fixedly connected to the active bevel gear; the lower plate is provided with a fixing hole, the radial bearing is fixed in the fixing hole, one end of the screw rod is vertically inserted and tightly fitted in the radial bearing; the screw rod nut is matched and connected with the preset position of the screw rod, and the spring seat is fixedly connected to the screw rod 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 bevel gear is sleeved and fixed on the screw rod, and is meshed and connected with the active bevel gear; The motor is used to drive the active bevel gear to rotate, so as to drive the driven bevel gear and the screw to rotate synchronously, so that under the cooperation of the screw and the screw nut, the spring seat moves vertically to adjust the compression amount of the spring.

2. The leveling structure based on bevel gears according to claim 1, characterized in that: The fixing hole includes a first step and a second step which are coaxially arranged; the second step is located on a side away from the upper plate, and a cross-sectional area of ​​the second step is smaller than a cross-sectional area of ​​the first step; and the outer ring of the radial bearing is interference fit in the second step.

3. The leveling structure based on bevel gears according to claim 2, characterized in that: The screw rod is also sleeved with a thrust bearing, and the outer side of the thrust bearing is also sleeved with a bearing sleeve, and the outer side of the bearing sleeve is installed on the first step; the driven bevel gear is pressed on one end of the thrust bearing close to the upper plate.

4. The leveling structure based on bevel gears according to claim 1, characterized in that: A limiting groove is provided at one end of the screw rod away from the spring, and a locking screw is arranged in the limiting groove; the locking screw is used to lock the screw rod to the inner ring of the radial bearing and limit the radial bearing to the lower plate.

5. The leveling structure based on bevel gears according to claim 1, characterized in that: A motor bracket is fixed on the lower plate, and the motor is fixed on the motor bracket.

6. The leveling structure based on bevel gears 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.

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