Ball screw damper device

Abstract

The utility model relates to a kind of ball screw damping devices, comprising;Mounting bracket;Shaft, shaft is equipped with outer thread;Rotary member, rotary member coaxial sleeve is located in shaft outer, rotary member and shaft form ball screw mechanism, rotary member is connected on mounting bracket, rotary member can rotate around shaft axis relative mounting bracket, and be limited along the axial movement of shaft relative mounting bracket;Damping assembly, damping assembly includes multiple elastic energy-consuming parts, elastic energy-consuming part connects rotary member and mounting bracket, multiple elastic energy-consuming parts are distributed along the circumferential interval of rotary member, rotary member is rotated by initial position relative mounting bracket, and the elastic force of elastic energy-consuming part is overcome.This application changes the axial movement of shaft into the rotary motion of rotary member, rotary member rotates and is elastically deformed by elastic energy-consuming part energy consumption, elastic energy-consuming part is arranged along the circumferential of rotary member, i. e. along the radial arrangement of shaft, does not occupy the space on the axial direction of shaft, shaft can have larger axial stroke under limited space, to ensure damping effect.

Description

Technical Field

[0001] This utility model relates to the field of engineering vibration reduction technology, specifically to a ball screw vibration reduction device. Background Technology

[0002] Most current mainstream vibration damping devices adopt the working mode of "direct linear displacement driving elastic deformation". Sufficient elastic deformation stroke needs to be reserved along the direction of force. In space-constrained scenarios, this structure is prone to layout conflicts with surrounding components, forcing the compression of the damping stroke, resulting in poor damping effect. Utility Model Content

[0003] Based on the above description, this utility model provides a ball screw damping device to solve the problem that in space-constrained scenarios, the structure in which linear displacement directly drives the deformation of the elastic element is prone to layout conflicts with surrounding components, forcing the compression of the damping stroke and resulting in poor damping effect.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This application provides a ball screw vibration damping device, the technical solution of which is as follows: A ball screw damping device includes; Mounting rack; A shaft, wherein the shaft is provided with external threads; A rotating component is coaxially sleeved outside the shaft, forming a ball screw mechanism with the shaft. The rotating component is connected to the mounting bracket and can rotate relative to the mounting bracket about the shaft axis, and is restricted to move relative to the mounting bracket along the shaft axis. A shock-absorbing assembly includes multiple elastic energy-dissipating elements, which connect the rotating member to the mounting frame. The multiple elastic energy-dissipating elements are distributed circumferentially along the rotating member. When the rotating member rotates relative to the mounting frame from its initial position, it overcomes the elastic force of the elastic energy-dissipating elements.

[0005] Preferably, the elastic energy-dissipating component includes a spring.

[0006] Preferably, the damping assembly further includes a plurality of yielding energy dissipation elements, which connect the rotating member and the mounting frame. The plurality of yielding energy dissipation elements are distributed at intervals along the circumference of the rotating member. When the rotating member rotates from its initial position relative to the mounting frame by more than a set angle, the yielding energy dissipation elements undergo plastic deformation.

[0007] Preferably, the yielding energy dissipation component includes a flexible metal rope, with both ends of the flexible metal rope connected to the mounting frame and the rotating component, respectively. When the rotating component rotates from its initial position relative to the mounting frame without exceeding a set angle, the yielding energy dissipation component undergoes elastic deformation.

[0008] Preferably, when the rotating component is in the initial position, the flexible metal rope is in a taut state.

[0009] Preferably, the rotating component includes a first segment and a second segment distributed along the axial direction, the outer diameter of the first segment is larger than the outer diameter of the second segment, the elastic energy dissipation component includes a spring, the two ends of the spring are respectively connected to the outer wall of the first segment and the mounting bracket, and the two ends of the yielding energy dissipation component are respectively connected to the outer wall of the second segment and the mounting bracket.

[0010] Preferably, the flexible metal rope is a nickel-titanium alloy rope.

[0011] Preferably, the rotating component is mounted on the mounting frame via a bracket, the bracket including two limiting plates, the two limiting plates being located on opposite sides of the rotating component in the axial direction of the shaft, the limiting plates being fixed to the mounting frame, the shaft passing through the two limiting plates and being movable relative to the limiting plates in the axial direction, suitable for restricting the movement of the rotating component relative to the mounting frame in the axial direction of the shaft by the two limiting plates.

[0012] Compared with the prior art, the technical solution of this application has at least the following beneficial technical effects: 1. This application converts the axial motion of the shaft into the rotational motion of a rotating component. When the rotating component rotates, it overcomes the elastic force of the elastic energy-dissipating component, thereby dissipating energy through the elastic deformation of the component and achieving vibration damping. The elastic energy-dissipating component is arranged circumferentially along the rotating component, i.e., radially along the shaft, and does not occupy axial space on the shaft. This allows the shaft to have a large axial travel within a limited space, thus ensuring the vibration damping effect.

[0013] 2. This application, through the setting of yielding energy-dissipating components, ensures that during the first stage of vibration damping, when the rotation angle of the rotating component does not exceed the set value, energy is dissipated through the elastic deformation of the elastic energy-dissipating components and the yielding energy-dissipating components. At this time, the elastic energy-dissipating components and the yielding energy-dissipating components can recover their deformation to continue to perform the vibration damping function. During the second stage of vibration damping, the shaft and the mounting bracket experience a large relative displacement, causing the rotation angle of the rotating component to exceed the set value. At this time, energy is dissipated through the elastic deformation of the elastic energy-dissipating components and the plastic deformation of the yielding energy-dissipating components. This stage of the device has higher vibration damping performance. The vibration damping device has a two-stage vibration damping function, which can achieve good vibration damping effect for different levels of vibration. Attached Figure Description

[0014] Figure 1 A schematic diagram of the structure of the ball screw damping device provided in this embodiment of the utility model; Figure 2 A schematic diagram of the structure of the ball screw damping device provided in this embodiment of the utility model, in which the elastic energy dissipation component is arranged circumferentially along the rotating component.

[0015] Explanation of reference numerals in the attached figures: 1. Mounting cylinder; 2. Shaft; 3. Rotating component; 31. First segment; 32. Second segment; 4. Elastic energy dissipation component; 5. Limiting plate; 6. Connecting cylinder; 7. Connecting ring; 8. Yielding energy dissipation component. Detailed Implementation

[0016] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0018] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0019] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0020] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0021] Reference Figure 1 As shown, this application provides a ball screw damping device, including a mounting frame, a shaft 2, a rotating component 3, and a damping assembly. The shaft 2 has an external thread, and the rotating component 3 is coaxially sleeved outside the shaft 2, forming a ball screw mechanism with the shaft 2. The rotating component 3 is connected to the mounting frame and can rotate relative to the mounting frame around the axis of the shaft 2, but is restricted to move relative to the mounting frame along the axial direction of the shaft 2. The damping assembly includes multiple elastic energy dissipating elements 4, which connect the rotating component 3 and the mounting frame. The multiple elastic energy dissipating elements 4 are spaced apart circumferentially along the rotating component 3. When the rotating component 3 rotates relative to the mounting frame from its initial position, it overcomes the elastic force of the elastic energy dissipating elements 4.

[0022] When shaft 2 moves axially, it drives rotating component 3 to rotate, converting the axial motion of shaft 2 into the rotational motion of rotating component 3. When rotating component 3 rotates, it overcomes the elastic force of elastic energy-dissipating component 4, thereby dissipating energy through the elastic deformation of elastic energy-dissipating component 4 and achieving the vibration damping function. Elastic energy-dissipating component 4 is arranged circumferentially along rotating component 3, that is, radially along shaft 2, and does not occupy the axial space of shaft 2. Shaft 2 can have a large axial stroke in a limited space, thus ensuring the vibration damping effect.

[0023] Reference Figure 1 and Figure 2 As shown, specifically, the mounting bracket includes a cylindrical mounting cylinder 1, which is closed at one end and open at the other. A rotating component 3 is disposed inside the mounting cylinder 1 and mounted on the mounting cylinder 1 via a bracket.

[0024] Reference Figure 1 As shown, the bracket includes two limiting plates 5, which are located on opposite sides of the rotating member 3 in the axial direction of the shaft 2. The limiting plates 5 are fixed to the mounting frame. The shaft 2 passes through the two limiting plates 5 and can move relative to the limiting plates 5 in the axial direction. It is suitable to restrict the movement of the rotating member 3 relative to the mounting frame in the axial direction of the shaft 2 by the two limiting plates 5.

[0025] Reference Figure 1As shown, specifically, connecting cylinders 6 are connected to the sides of the two limiting plates 5 that are far apart from each other. The connecting cylinders 6 are coaxially sleeved on the outside of the shaft 2. One end of the connecting cylinder 6 near the closed end of the mounting cylinder 1 is fixed to the limiting plate 5, and the other end is fixed to the end plate of the closed end of the mounting cylinder 1. One end of the connecting cylinder 6 near the through end of the mounting cylinder 1 is fixed to the limiting plate 5, and the other end is fixedly connected to the inner wall of the mounting cylinder 1 through a connecting ring 7. This achieves a fixed connection between the limiting plates 5 and the mounting cylinder 1, thereby restricting the axial movement of the rotating part 3 along the shaft 2 by the two limiting plates 5.

[0026] To reduce the frictional resistance between the rotating component 3 and the limiting plate 5, a thrust bearing can be installed between the limiting plate 5 and the rotating component 3 to reduce the rotational resistance of the rotating component 3 and ensure that the rotating component 3 rotates smoothly.

[0027] Reference Figure 1 As shown, one end of the shaft 2 passes through the mounting cylinder 1 and connects to the rotating component 3. The external thread of the shaft 2 is located at this end. The shaft 2 and the rotating component 3 can be connected by a ball nut to form a ball screw mechanism. Specifically, the ball nut and shaft 2 form a threaded engagement, while the rotating component 3 is coaxially fixed with the ball nut. This achieves the threaded engagement between the shaft 2 and the rotating component 3, ensuring that the shaft 2 can drive the rotating component 3 to rotate when it moves axially, thereby achieving the purpose of vibration reduction.

[0028] Reference Figure 1 As shown, the elastic energy-dissipating component 4 can be a spring; in this embodiment, a tension spring is used for illustration. The axis of the tension spring is perpendicular to the axis of the shaft 2, and both ends of the tension spring are fixedly connected to the inner wall of the mounting cylinder 1 and the outer wall of the rotating component 3, respectively. When the tension spring is in its minimum tension state, the rotating component 3 is in its initial position, at which point the axis of the tension spring intersects with the axis of the shaft 2. This arrangement ensures that the rotating component 3 overcomes the elastic force of the tension spring when rotating from its initial position in any direction, thereby achieving the purpose of shock absorption when the shaft 2 moves in any direction. In actual design, the preload of the tension spring when the rotating component 3 is in its initial position can be set as needed to ensure the shock absorption effect.

[0029] Reference Figure 1 and Figure 2 As shown, in this embodiment, two sets of elastic energy dissipation components 4 are provided. Each set includes six elastic energy dissipation components 4 evenly spaced along the circumference of the rotating component 3. The two sets of elastic energy dissipation components 4 are spaced apart along the axial direction of the shaft 2.

[0030] Reference Figure 1 As shown, the damping assembly further includes multiple yielding energy dissipation elements 8. The yielding energy dissipation elements 8 connect the rotating element 3 and the mounting frame. The multiple yielding energy dissipation elements 8 are distributed at intervals along the circumference of the rotating element 3. When the rotating element 3 rotates from its initial position relative to the mounting frame by more than a set angle, the yielding energy dissipation elements 8 undergo plastic deformation.

[0031] When the rotating component 3 rotates from its initial position relative to the mounting bracket without exceeding the set angle, the yielding energy dissipation component 8 undergoes elastic deformation. This is the first stage of vibration reduction, where energy is dissipated through the elastic deformation of the elastic energy dissipation component 4 and the yielding energy dissipation component 8. At this time, the elastic energy dissipation component 4 and the yielding energy dissipation component 8 can recover their deformation to continue to play a vibration reduction role.

[0032] When the rotating component 3 rotates more than a set angle relative to the mounting bracket from its initial position, the yielding energy-dissipating component 8 undergoes plastic deformation. This is the second stage of vibration damping. Energy is rapidly dissipated through the elastic deformation of the elastic energy-dissipating component 4 and the plastic deformation of the yielding energy-dissipating component 8, resulting in higher vibration damping performance. Therefore, the vibration damping device has a two-stage vibration damping function, which can exert a good vibration damping effect on different levels of vibration.

[0033] The yielding energy dissipation component 8 includes a flexible metal rope, with its two ends connected to the mounting frame and the rotating component 3, respectively. When the rotating component 3 is in its initial position, the flexible metal rope is taut. This ensures that when the rotating component 3 rotates from its initial position in any direction, it overcomes the elastic force of the tension spring and the flexible metal rope, thereby achieving vibration damping when the shaft 2 moves in any direction.

[0034] In this embodiment, the flexible metal rope is a nickel-titanium alloy rope.

[0035] Reference Figure 1 As shown, the rotating component 3 further includes a first segment 31 and a second segment 32 distributed along the axial direction. The outer diameter of the first segment 31 is larger than the outer diameter of the second segment 32. The elastic energy dissipation component 4 includes a spring, with both ends of the spring connected to the outer wall of the first segment 31 and the mounting bracket, respectively. The yielding energy dissipation component 8 has both ends connected to the outer wall of the second segment 32 and the mounting bracket, respectively. The first segment 31 and the second segment 32 are integrally formed and are both cylindrical. During the rotation of the rotating component 3 at a set angle, the displacement of a point on the outer wall of the first segment 31 and a point on the outer wall of the second segment 32 in the circumferential direction of the rotating component 3 is different. Therefore, the tensile deformation lengths of the elastic energy dissipation component 4 and the yielding energy dissipation component 8 are different, with the tensile deformation length of the yielding energy dissipation component 8 being shorter than that of the elastic energy dissipation component 4. This arrangement can delay the time for the yielding energy dissipation component 8 to undergo plastic deformation. Before the yielding energy dissipation component 8 undergoes plastic deformation, the elastic energy dissipation component 4 undergoes a larger elastic deformation, thus fully utilizing the performance of the elastic energy dissipation component 4.

[0036] In this embodiment, six yielding energy dissipation elements 8 are provided for illustration.

[0037] The other end of the shaft 2 is located outside the mounting cylinder 1 and is connected to a hinged lug for connection with the building structure. Correspondingly, a hinged lug can be provided outside the closed end of the mounting cylinder 1 to connect with another part of the building structure.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A ball screw vibration damping device, characterized in that, include; Mounting rack; Shaft (2), the shaft (2) is provided with external thread; Rotating component (3), the rotating component (3) is coaxially sleeved outside the shaft (2), the rotating component (3) and the shaft (2) form a ball screw mechanism, the rotating component (3) is connected to the mounting frame, the rotating component (3) can rotate relative to the mounting frame around the axis of the shaft (2), and is restricted to move relative to the mounting frame along the axial direction of the shaft (2); The shock absorption assembly includes multiple elastic energy dissipation elements (4), which connect the rotating element (3) to the mounting frame. The multiple elastic energy dissipation elements (4) are distributed circumferentially along the rotating element (3). When the rotating element (3) rotates relative to the mounting frame from its initial position, it overcomes the elastic force of the elastic energy dissipation elements (4).

2. The ball screw damping device according to claim 1, characterized in that: The elastic energy-dissipating component (4) includes a spring.

3. The ball screw damping device according to claim 1, characterized in that: The damping assembly also includes multiple yielding energy dissipation elements (8), which connect the rotating element (3) to the mounting frame. The multiple yielding energy dissipation elements (8) are distributed circumferentially along the rotating element (3). When the rotating element (3) rotates from its initial position relative to the mounting frame by more than a set angle, the yielding energy dissipation elements (8) undergo plastic deformation.

4. The ball screw damping device according to claim 3, characterized in that: The yielding energy dissipation component (8) includes a flexible metal rope, with both ends of the flexible metal rope connected to the mounting frame and the rotating component (3) respectively. When the rotating component (3) rotates from its initial position relative to the mounting frame without exceeding a set angle, the yielding energy dissipation component (8) undergoes elastic deformation.

5. The ball screw damping device according to claim 4, characterized in that: When the rotating component (3) is in the initial position, the flexible metal rope is in a taut state.

6. The ball screw damping device according to claim 4, characterized in that: The rotating component (3) includes a first segment (31) and a second segment (32) distributed along the axial direction. The outer diameter of the first segment (31) is larger than the outer diameter of the second segment (32). The elastic energy dissipation component (4) includes a spring. The two ends of the spring are respectively connected to the outer wall of the first segment (31) and the mounting bracket. The two ends of the yielding energy dissipation component (8) are respectively connected to the outer wall of the second segment (32) and the mounting bracket.

7. The ball screw damping device according to claim 4, characterized in that: The flexible metal rope is a nickel-titanium alloy rope.

8. The ball screw damping device according to claim 1, characterized in that: The rotating component (3) is mounted on the mounting frame via a bracket. The bracket includes two limiting plates (5). The two limiting plates (5) are located on opposite sides of the rotating component (3) in the axial direction of the shaft (2). The limiting plates (5) are fixed to the mounting frame. The shaft (2) passes through the two limiting plates (5) and can move axially relative to the limiting plates (5). It is suitable to restrict the movement of the rotating component (3) relative to the mounting frame in the axial direction of the shaft (2) by the two limiting plates (5).

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