An adjustable-damping rotary damper

Abstract

The adjustable damping rotary damper is characterized in that: a closed cavity is filled with liquid damping oil; a vane shaft with an axial through hole is installed on the cavity through double bearings; a vane on the lower part of the vane shaft is placed in the cavity; the upper part of the vane shaft extends out of the cavity; a sealing ring is arranged between the vane shaft and the cavity; one or several floating sealing plugs are arranged in the axial through hole of the vane shaft; a sealing plug limiting screw is screwed on the axial through hole of the top surface of the vane shaft; an external actuating part connected with a rotating shaft of a mechanical equipment is installed and fixed on the upper part of the vane shaft; a columnar body is arranged between the bottom plate and the top plate of the cavity; a damping adjusting shaft for stepwise damping adjustment or a linear damping shaft for linear damping adjustment is rotatably arranged between the outer lateral wall of the cavity and the columnar body through a sealing ring. The damper has the advantages of small volume, light weight, consistent damping provided no matter the vane shaft rotates forward or reversely, and the functions of stepwise damping adjustment and linear damping adjustment.

Description

Technical Field

[0001] This utility model relates to a damper that provides resistance to reduce kinetic energy so as to enable a product to achieve smooth mechanical motion, and in particular an adjustable bidirectional rotary damper. Background Technology

[0002] A rotary damper, also known as a rotary shock absorber or damping hinge, has the core function of providing resistance in the opposite direction of rotational motion and proportional to the speed of motion. It achieves this through an internal viscous fluid (such as silicone oil) or a high-precision mechanical mechanism, thereby dissipating kinetic energy and achieving the effects of buffering, vibration reduction, stabilization, and speed control.

[0003] Applications often include various types of hinges, automotive suspensions, aircraft landing gear, cabin / car doors, drone gimbals, and mounting brackets.

[0004] For example, the viscous damper produced by Shandong Shantai Intelligent Equipment Co., Ltd. is a velocity-dependent structural energy dissipation and vibration reduction device designed and manufactured based on the principle of generating damping force through the interaction between viscous fluid and damper structural components. During operation, relative movement occurs between the piston and cylinder of the viscous damper installed in the structure. Due to the pressure difference before and after the piston, viscous fluid flows through the damping channel, thereby generating damping force to dissipate the vibration energy input to the structure from the outside, achieving the purpose of reducing structural vibration.

[0005] The aforementioned dampers typically have fixed damping values, meaning they are the damping parameters specified at the factory. The structure can only bear a small load, resulting in low rotational control precision, making them virtually impossible to maintain and causing poor stability. Their usage is also inflexible. Utility Model Content

[0006] The purpose of this invention is to provide a small-sized and lightweight adjustable rotary damper, which aims to ensure that the damping on both sides of the chamber remains consistent regardless of whether the damper blade shaft rotates clockwise or counterclockwise, and to achieve segmented damping adjustment as well as linear damping adjustment.

[0007] The purpose of this utility model is achieved as follows: An adjustable damping rotary damper comprises a closed cavity filled with liquid damping oil. A blade shaft with an axially penetrating hole is mounted on the cavity via double bearings. One blade on the lower part of the blade shaft is placed inside the cavity, and the upper part of the blade shaft extends upwards out of the cavity. A blade shaft sealing ring is provided between the blade shaft and the cavity. One or more floating sealing plugs are provided in the axially penetrating hole of the blade shaft. A sealing plug limiting screw is screwed onto the axially penetrating hole on the top surface of the blade shaft. An external actuating component used for connecting to the rotating main shaft of mechanical equipment is installed and fixed on the upper part of the blade shaft. A columnar body is located between the bottom plate and the top plate of the cavity, forming a segmented damping mechanism. Both the adjustable damping shaft and the linearly adjustable damping shaft are rotatably mounted between the outer wall of the cavity and the cylindrical body via a sealing ring. The damping shaft structure is as follows: the upper solid cylinder has two grooves for the sealing ring to be embedded in, and the lower cylinder has several circular or strip-shaped holes of different diameters that are interconnected along the radial direction and through the axis. The linear damping shaft structure is as follows: the upper solid cylinder has two grooves for the sealing ring to be embedded in, and the lower cylinder has an opening with a projection of a right-angled triangle on approximately half of its circumference. One right-angled side of the right-angled triangle extends upward from the bottom of the lower cylinder and is parallel to the axis of the lower cylinder.

[0008] The bottom of the lower cylindrical body of the damping adjustment shaft contacts the bottom plate of the cavity; the upper cylindrical body of the linear damping shaft extends downward along its axis to form a support column with a diameter smaller than the inner diameter of the lower cylindrical body, and a disk at the lower end of the support column contacts the bottom plate of the cavity.

[0009] The damping adjustment shaft has several small holes arranged on half a circumference, and the diameter or length of the several circular or strip-shaped small holes increases or decreases sequentially as the damping adjustment shaft rotates.

[0010] Both the damping adjustment shaft and the linear damping shaft have hexagonal holes on their top surfaces for a hexagonal wrench to operate.

[0011] Both the damping adjustment shaft and the linear damping shaft have a zero-position scale line on their top surfaces. The zero-position scale line corresponds to multiple scale lines on the top surface of the cavity to indicate the position of the damping adjustment shaft or the linear damping shaft at different damping values. When the zero-position scale line of the damping adjustment shaft is aligned with any scale line of the cavity, only one small hole on the damping adjustment shaft is open to the liquid damping oil.

[0012] The cavity structure is as follows: the top plate and the front, rear, left and right side plates are integrated to form the upper cavity. The cavity cover is fixed to the upper cavity as the bottom plate by screws, and a cavity sealing ring is provided between the cavity cover and the upper cavity. The center lines of the damping adjustment shaft or linear damping shaft and the blade shaft are parallel. The plane containing the center lines of the three parallel axes is used as the reference plane to divide the cavity into a left cavity and a right cavity. The internal space shape of the left cavity and the right cavity is symmetrical about the reference plane.

[0013] The beneficial effects of this utility model are:

[0014] 1. The entire system has a symmetrical internal structure, so no matter whether the damper blade shaft rotates clockwise or counterclockwise, the damping on both sides can always remain consistent.

[0015] 2. Since the entire volume of the damping adjustment shaft is contained within the system cavity, no matter how the damping is adjusted, it will not cause a change in the volume of the system cavity. The damping of the entire system and the system cavity will always be in an extremely stable state.

[0016] 3. The adjustable damping level is related to the number of damping holes on the damping adjustment shaft ②. However, the damping shaft can be made into a completely linear opening and closing mode, as shown in the linear damping shaft. That is, this structure can achieve the change from segmented damping to linear damping adjustment by only replacing the damping adjustment shaft ② without changing the design of other parts, so as to meet the usage needs of different scenarios and costs.

[0017] 4. Under the current system structure, ① the damper blade shaft is assembled with a double bearing structure, and the control accuracy of the main shaft load, whether radial or axial, as well as rotation, is greatly improved compared with the traditional rotary damper.

[0018] 5. This system can reduce the size and weight of the structure, and while ensuring functionality, it can be used in various types of mechanical equipment, such as aircraft, drones, ships, automobiles, vehicle models and other fields that require damping control of rotational motion. Attached Figure Description

[0019] Figure 1 , 2 Figures 3 and 4 are three-dimensional views of this rotary damper from different perspectives.

[0020] Figure 4 , 5 6 are respectively Figure 1 Front view, rear view, and top view.

[0021] Figure 7 yes Figure 6 Enlarged view of part C.

[0022] Figure 8 yes Figure 4 Cross-sectional view along line AA.

[0023] Figure 9 yes Figure 5 Cross-sectional view along line BB.

[0024] Figure 10 , 11 yes Figure 8 The image shows a three-dimensional view of the adjustable damping shaft from different perspectives.

[0025] Figure 12 , 13 They are Figure 11 The front view and the back view.

[0026] Figure 14 , 15 They are Figure 11 The bottom view and the top view.

[0027] Figure 16 , 17 These are three-dimensional images of the linear damping axis from different perspectives.

[0028] Figure 18 , 19 20 and 21 are respectively Figure 16 Front view, rear view, bottom view, and top view.

[0029] Figure 22 yes Figure 19 Cross-sectional view along line AA.

[0030] Figure 23 yes Figure 18 Cross-sectional view along line BB. Detailed Implementation

[0031] In the attached diagram, 1-damper blade shaft, 2-damping adjustment shaft, 3-cavity, 4-cavity cover, 5-external actuating component, 6-blade shaft sealing ring, 7-(damping adjustment shaft) sealing ring, 8-cavity cover sealing ring, 9-floating sealing plug, 10-(blade shaft) double bearing, 11-sealing plug limit screw, 12-cavity cover screw, 13-linear damping shaft.

[0032] Figure 8The diagram illustrates an adjustable rotary damper. A closed cavity 3 contains liquid damping oil 14. A blade shaft 1 with an axially penetrating hole is mounted on the cavity via double bearings 10. A blade on the lower part of the blade shaft is placed inside the cavity, and the upper part of the blade shaft extends upwards out of the cavity. A blade shaft sealing ring 6 is provided between the blade shaft and the cavity. One or more floating sealing plugs 9 are provided in the axially penetrating hole of the blade shaft. A sealing plug limiting screw 11 is screwed onto the axially penetrating hole on the top surface of the blade shaft. An external actuating component 5, used for connection to the rotating main shaft of a mechanical device, is mounted and fixed on the upper part of the blade shaft. A columnar body is located between the bottom and top plates of the cavity. A segmented damping adjustable shaft 2 or a linear damping adjustable shaft... The adjustable linear damping shafts 13 are rotatably mounted between the outer wall of the cavity and the cylindrical body via sealing rings 7. The damping adjustment shaft structure is as follows: the upper solid cylinder has two grooves for the sealing rings 7 to be embedded in; the lower cylinder has several circular or strip-shaped holes of different diameters that are interconnected along the same circumference and pass through the axis. The linear damping shaft structure is as follows: the upper solid cylinder has two grooves for the sealing rings to be embedded in; the lower cylinder has an opening with a projection of a right-angled triangle on approximately half of its circumference. One right-angled side of the right-angled triangle extends upward from the bottom of the lower cylinder and is parallel to the axis of the lower cylinder (the slope of the hypotenuse of the projected right-angled triangle determines the gain value of the adjustable damping). See [link to relevant documentation]. Figure 1-7 , Figure 6 , 7 9. See also Figure 9 The damping adjustment shaft or linear damping shaft is rotated with the column.

[0033] See Figure 10 , Figure 16 The bottom of the lower cylindrical body of the damping adjustment shaft contacts the bottom plate of the cavity; the upper cylindrical body of the linear damping shaft extends downward along its axis to form a support column with a diameter smaller than the inner diameter of the lower cylindrical body, and a disk at the lower end of the support column contacts the bottom plate of the cavity.

[0034] The damping adjustment shaft has several small holes arranged on half a circumference, and the diameter or length of the several circular or strip-shaped small holes (the damping value decreases as the diameter or length of the small holes increases or increases) increases or decreases sequentially as the damping adjustment shaft rotates.

[0035] Both the damping adjustment shaft and the linear damping shaft have hexagonal holes on their top surfaces for a hexagonal wrench to operate.

[0036] Both the damping adjustment shaft and the linear damping shaft have a zero-position scale line on their top surfaces. The zero-position scale line corresponds to multiple scale lines on the top surface of the cavity to indicate the position of the damping adjustment shaft or the linear damping shaft at different damping values. When the zero-position scale line of the damping adjustment shaft is aligned with any scale line of the cavity, only one small hole on the damping adjustment shaft is open to the liquid damping oil.

[0037] The cavity structure is as follows: the top plate and the front, rear, left, and right side plates are integrated to form the upper cavity; the cavity cover 4 serves as the bottom plate and is fixed to the upper cavity by screws 12; a cavity sealing ring 8 is provided between the cavity cover and the upper cavity; the center lines of the damping adjustment shaft or linear damping shaft and the blade shaft are parallel, and the plane containing the parallel center lines is used as the reference plane to divide the cavity into a left cavity and a right cavity; the internal space shapes of the left and right cavities are symmetrical about the reference plane. Figure 9 The control body shown can be cylindrical.

[0038] The structural system is operating as follows:

[0039] 1. After the damper is assembled, the entire cavity is filled with liquid damping oil (medium);

[0040] 2. ⑤ The external actuating part is fixedly connected to the damper blade shaft of ①. When the external actuating part of ⑤ rotates, it drives the damper blade shaft of ① to rotate.

[0041] 3. ① The damper blade shaft rotates, and the blades push the damping oil in the cavity to flow along the inside of the cavity and through the small hole on ② the damping adjustment shaft.

[0042] 4. The current system damping value is determined by the viscosity of the damping oil (medium) itself and the small hole on the damping adjustment shaft. When the damping oil (medium) itself remains unchanged, the system damping value is determined by the diameter (or flow cross-sectional area) of the small hole. That is, the larger the diameter (or flow cross-sectional area) of the small hole, the smaller the damping value generated by the system.

[0043] 5. ② The damping adjustment shaft is cylindrical, and the cylindrical surface has several small holes of different sizes that pass radially through the axis of the cylinder from the circumference. Each set of small holes corresponds to a set of system damping values.

[0044] 6. ② The exposed end face of the damping adjustment shaft has a zero-position scale line corresponding to the small hole on the damping shaft. The zero-position scale line corresponds to multiple scale lines on the ③ cavity. Use a tool to rotate the ② damping adjustment shaft to the corresponding scale position. By the correspondence between the scale line of the ② damping adjustment shaft and the scale line on the ③ cavity, the position of the damping shaft in the small hole can be determined.

[0045] 7. ② Each set of damping holes on the damping adjustment shaft will only have one set conducting in the cavity at each scale. That is, each scale corresponds to a set of system damping values. The size of the system damping can be adjusted by rotating the damping adjustment shaft.

[0046] When the blades rotate, they push the damping oil through the damping adjustment shaft corresponding to the open damping holes, resulting in different damping depending on the size of the damping holes or the stroke of the damping shaft flaps.

[0047] Should we add a description of the structural features? Under the current structure, the parts immersed in the damping oil in the cavity will not change the liquid volume in the cavity under any operating state and damping value setting, making it more stable and reliable than the traditional piston damper.

Claims

1. An adjustable damping rotary damper, characterized in that, The closed cavity (3) contains liquid damping oil (14). A blade shaft (1) with an axial through hole is mounted on the cavity via a double bearing (10). A blade on the lower part of the blade shaft is placed in the cavity, and the upper part of the blade shaft extends upward into the cavity. A blade shaft sealing ring (6) is provided between the blade shaft and the cavity. One or more floating sealing plugs (9) are provided in the axial through hole of the blade shaft. A sealing plug limiting screw (11) is screwed onto the axial through hole on the top surface of the blade shaft. An external actuating component (5) used to connect with the rotating main shaft of the mechanical equipment is installed and fixed on the upper part of the blade shaft. There is a columnar body between the bottom plate and the top plate of the cavity. The damping adjustment is segmented and adjustable. The joint shaft (2) or the linear damping shaft (13) with adjustable linear damping is rotatably set between the outer wall of the cavity and the columnar body through the sealing ring (7). The damping adjustment shaft structure is as follows: the upper solid cylinder is provided with two grooves for the sealing ring (7) to be embedded, and the lower cylinder has several circular or strip-shaped holes of different diameters that are open radially along the same circumference and through the axis. The linear damping shaft structure is as follows: the upper solid cylinder is provided with two grooves for the sealing ring to be embedded, and the lower cylinder has an opening with a projection of a right triangle on about 1 / 2 of the circumference. One right-angled side of the right triangle extends upward from the bottom of the lower cylinder and is parallel to the axis of the lower cylinder.

2. The adjustable damping rotary damper according to claim 1, characterized in that, The bottom of the lower cylindrical body of the damping adjustment shaft contacts the bottom plate of the cavity; the upper cylindrical body of the linear damping shaft extends downward along its axis to form a support column with a diameter smaller than the inner diameter of the lower cylindrical body, and a disk at the lower end of the support column contacts the bottom plate of the cavity.

3. The adjustable damping rotary damper according to claim 2, characterized in that, The damping adjustment shaft has several small holes arranged on half a circumference, and the diameter or length of the several circular or strip-shaped small holes increases or decreases sequentially as the damping adjustment shaft rotates.

4. An adjustable damping rotary damper according to claim 1, 2, or 3, characterized in that, Both the damping adjustment shaft and the linear damping shaft have hexagonal holes on their top surfaces for a hexagonal wrench to operate.

5. The adjustable damping rotary damper according to claim 4, characterized in that, Both the damping adjustment shaft and the linear damping shaft have a zero-position scale line on their top surfaces. The zero-position scale line corresponds to multiple scale lines on the top surface of the cavity to indicate the position of the damping adjustment shaft or the linear damping shaft at different damping values. When the zero-position scale line of the damping adjustment shaft is aligned with any scale line of the cavity, only one small hole on the damping adjustment shaft is open to the liquid damping oil.

6. The adjustable damping rotary damper according to claim 5, characterized in that, The structure of the cavity is as follows: the top plate and the front, rear, left and right side plates are integrated to form the upper cavity. The cavity cover (4) is fixed to the upper cavity as the bottom plate by screws (12) and a cavity sealing ring (8) is provided between the cavity cover and the upper cavity. The center lines of the damping adjustment shaft or linear damping shaft and the blade shaft are parallel. The plane where the center lines of the three parallel axes are located is the reference plane, and the cavity is divided into a left cavity and a right cavity. The internal space shape of the left cavity and the right cavity is symmetrical about the reference plane.

Images