An active shock absorber

Abstract

The present application discloses an active shock absorber, comprising: a rhombic motion mechanism, a slider, a main frame and a motor; the motor is arranged on the main frame and includes a telescopic end; both ends of the slider are respectively connected to the rhombic motion mechanism and the telescopic end; the rhombic motion mechanism is fixed on the main frame and can generate a rapid expansion motion perpendicular to the telescopic direction of the telescopic end under the drive of the motor. By arranging the motor and the rhombic motion mechanism, when braking is required, the motor is started, and the slider is pushed by the telescopic end to move towards the direction close to the rhombic motion mechanism; the rhombic motion mechanism is squeezed, and both ends are output outwards at an angle, which can be used to resist a platform moving at high speed, and the two are in frictional contact to achieve the shock absorption effect, with fast response speed and high precision, effectively solving the problems that the existing shock absorbers have low response precision and require a long shock absorption time.

Description

Technical Field

[0001] This application relates to the field of high-precision motion damping technology, and particularly to an active damper. Background Art

[0002] In recent years, the technology of precision motion platforms has developed rapidly. The performance of equipment such as high speed and high precision has been continuously improved, and the vibration problem in the motion switching link has become increasingly prominent, becoming a bottleneck restricting the further development of precision positioning platforms. The vibration problem is an important issue in the research of positioning platforms. The vibration control in the motion switching link is directly related to the quality of the positioning accuracy, related to important aspects such as the rapid positioning and micro-precision feeding of the motion platform, and is the key problem to ensure the accurate operation of the platform and determine the development level of the platform, and is also a comprehensive problem. Under the conditions of high speed and high precision of the platform, even tiny and hardly noticeable vibrations and interferences will have a serious impact on the platform, and the vibration problem has become a prominent problem in precision positioning platforms.

[0003] Most of the current dampers use springs or air bags as the main body for buffer damping, with relatively low response accuracy, and their volume is relatively large, requiring a long damping time. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide an active damper to solve the problems of relatively low response accuracy and long damping time of the existing dampers.

[0005] To achieve the above technical purpose, this application provides an active damper, including: a rhombic motion mechanism, a slider, a main frame and a motor;

[0006] The motor is arranged on the main frame and includes a telescopic end;

[0007] Both ends of the slider are respectively connected to the rhombic motion mechanism and the telescopic end;

[0008] The rhombic motion mechanism is fixed on the main frame and can generate a rapid expansion motion perpendicular to the telescopic direction of the telescopic end under the drive of the motor.

[0009] Preferably, the rhombic motion mechanism includes two connecting end angles and two output end angles;

[0010] The two connecting end angles are respectively connected to the main frame and the slider;

[0011] The two output end angles can extend outward.

[0012] Preferably, it further includes an arc-shaped output end;

[0013] The arc-shaped output end is arranged on the output end angle.

[0014] Preferably, the two output end corners are respectively connected to the arc-shaped output ends through flexible hinges.

[0015] Preferably, the two connecting end corners are also respectively connected to the main frame and the telescopic end through flexible hinges.

[0016] Preferably, the flexible hinges are all three-arc flexible hinges.

[0017] Preferably, the main frame includes a first support plate and a second support plate;

[0018] An installation cavity for installing the motor and the diamond-shaped motion mechanism is formed between the first support plate and the second support plate;

[0019] The motor is arranged on the second supporting plate;

[0020] A connecting end angle of the diamond-shaped motion mechanism is fixed on the first supporting plate.

[0021] Preferably, the main frame further comprises four support columns;

[0022] The four support columns are sandwiched between the first support plate and the second support plate, and two symmetrical clamping rails are formed between the support columns;

[0023] The two output end corners are respectively arranged in the two clamping rails.

[0024] Preferably, the motor is a stepper motor.

[0025] Preferably, the telescopic end is specifically a screw rod.

[0026] It can be seen from the above technical scheme that the present application provides an active shock absorber, comprising: a main frame, a motor, a slider and a diamond motion mechanism; the motor is arranged on the main frame and includes a telescopic end; the two ends of the slider are respectively connected to the diamond motion mechanism and the telescopic end of the motor; the diamond motion mechanism is fixed on the main frame and can be deformed according to the movement of the slider.

[0027] By setting a motor and a diamond motion mechanism, when braking is needed, the motor is started, and the slider is pushed toward the diamond motion mechanism through the telescopic end; the diamond motion mechanism is squeezed, and the two end angles are output outward, which can be used to resist the high-speed moving platform. The two are in frictional contact to achieve a vibration reduction effect, with fast response speed and high accuracy, which effectively solves the problem of low response accuracy and long vibration reduction time of existing shock absorbers. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 The overall schematic diagram of an active shock absorber provided by an embodiment of the present application;

[0030] Figure 2 The front view of an active shock absorber provided by an embodiment of the present application;

[0031] Figure 3 The shock absorption flow chart of an active shock absorber provided by an embodiment of the present application;

[0032] In the figure: 1. The first support plate; 2. The support column; 3. The rhombic motion mechanism; 4. The slider; 5. The telescopic end; 6. The motor; 7. The second support plate; 8. The arc-shaped output end. Specific embodiments

[0033] The following will clearly and completely describe the technical solutions of the embodiments of the present application in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection requested by the present application.

[0034] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a replaceable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0036] The embodiments of the present application disclose an active shock absorber.

[0037] Please refer to Figure 1 , an active shock absorber provided in the embodiments of the present application includes: a main frame, a motor 6, a slider 4, and a rhombic motion mechanism 3; the motor 6 is arranged on the main frame and includes a telescopic end 5; both ends of the slider 4 are respectively connected to the rhombic motion mechanism 3 and the telescopic end 5; the rhombic motion mechanism 3 is fixed on the main frame, and under the drive of the motor 6, the telescopic end 5 pushes the slider towards the direction close to the rhombic motion mechanism 3, and then the rhombic motion mechanism 3 generates a rapid expansion motion perpendicular to the telescopic direction of the telescopic end. Specifically, the shock absorber can be mounted on the moving end of a high-speed moving platform and move together with the platform. Please refer to Figure 3 , the logic flow of the shock absorber can be as Figure 3 shown. When the movement of the platform needs to be braked, the motor 6 is started, and the torque is transmitted to the slider 4 through the telescopic end 5. The slider 4 approaches the rhombic motion mechanism 3 and squeezes the rhombic motion mechanism. At this time, two of the four end angles of the rhombic motion mechanism 3 approach each other, and two extend outward; the outward-extending end angles extend to frictionally contact the stationary end of the high-speed moving platform, thereby achieving the shock absorption effect.

[0038] The above is Embodiment 1 provided by the embodiments of the present application. The following is Embodiment 2 provided by the present application. For details, please refer to Figures 1 to 3 .

[0039] An active shock absorber includes: a main frame, a motor 6, a slider 4, and a rhombic motion mechanism 3; the motor 6 is arranged on the main frame and includes a telescopic end 5; both ends of the slider 4 are respectively connected to the rhombic motion mechanism 3 and the telescopic end 5; the rhombic motion mechanism 3 is fixed on the main frame and can deform according to the movement of the slider 4.

[0040] Further, the rhombic motion mechanism 3 includes two connecting end angles and two output end angles; the two connecting end angles are respectively connected to the main frame and the slider 4; the two output end angles can extend outward.

[0041] Specifically, the slider 4 is mounted on a slide rail, and the slide rail is mounted on the main frame; the slide rail is used to limit the degree of freedom of the movement of the slider and ensure that the slider 4 does not deviate when receiving the output force of the motor 6.

[0042] Further, it also includes an arc-shaped output end 8; the arc-shaped output end 8 is arranged at the corner of the output end.

[0043] Specifically, the arc-shaped output end 8 is specifically a semi-circular arc. The arc-shaped output end can avoid the problem of stress concentration caused by slight angular deviation during the contact of the shock absorber.

[0044] Further, the two corners of the output end are respectively connected to the arc-shaped output end 8 through flexible hinges. The two connecting end corners are also respectively connected to the main frame and the slider 4 through flexible hinges.

[0045] Further, the flexible hinges are all three-arc flexible hinges.

[0046] Specifically, in this embodiment, selecting the three-arc flexible hinge can improve the flexibility of the hinge, make the force transfer more effectively and reduce the stress concentration effect.

[0047] Further, the main frame includes a first support plate 1 and a second support plate 7; an installation cavity for installing the motor 6 and the rhombic motion mechanism 3 is formed between the first support plate 1 and the second support plate 7; the motor 6 is arranged on the second support plate 7; one connecting end corner of the rhombic motion mechanism 3 is fixed on the first support plate 1.

[0048] Specifically, both the motor 6 and the rhombic motion mechanism 3 are arranged between the first support plate 1 and the second support plate 7.

[0049] Further, the main frame also includes four support columns 2; the four support columns 2 are clamped between the first support plate 1 and the second support plate 7, and two symmetrical clamping rails are formed between the support columns; the two corners of the output end are respectively arranged in the two clamping rails.

[0050] Specifically, the clamping rails are used to limit the degrees of freedom of the corners of the output end, so that during the deformation of the rhombic motion mechanism 3, the corners of the output end move along the direction of the clamping rails.

[0051] Further, the motor 6 is specifically a stepper motor. The telescopic end 5 is specifically a lead screw.

[0052] Further, the specific process of the active shock absorber provided by the embodiment of the present application can be as Figure 3 shown:

[0053] S1. During the movement, it is judged whether braking is required;

[0054] Specifically, the active shock absorber is mounted on the moving end of the high-speed moving platform and moves together with the platform;

[0055] S11. When it is judged that braking is required, step S2 is performed;

[0056] S12. When it is determined that braking is not required, return to step S1;

[0057] S2. Start the motor 6 for active vibration reduction and proceed to step S3;

[0058] Specifically, at this time, the telescopic end 5 on the motor 6 pushes the slider 4 towards the diamond motion mechanism 3, and then the slider 4 pushes the diamond motion mechanism 3 to generate a rapid expansion motion perpendicular to the telescopic direction of the telescopic end 5;

[0059] S3. Determine whether the vibration of the high-speed moving platform has been reduced below the threshold;

[0060] S31. When it is determined that the vibration has not been reduced below the threshold, return to step S2;

[0061] S31. When it is determined that the vibration has been reduced below the threshold, end the process.

[0062] The above are the preferred embodiments of the present application and are not used to limit the present invention. Although the present application has been described in detail with reference to the examples, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing examples, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An active shock absorber, characterized in that, Comprising: A rhombic motion mechanism, a slider, a main frame, an arc-shaped output end, and a motor; The motor is arranged on the main frame and includes a telescopic end; Both ends of the slider are respectively connected to the rhombic motion mechanism and the telescopic end; The rhombic motion mechanism is fixed on the main frame and can generate a rapid expansion motion perpendicular to the telescopic direction of the telescopic end under the drive of the motor; The rhombic motion mechanism includes two connecting end corners and two output end corners; The two connecting end corners are respectively connected to the main frame and the slider; The two output end corners can extend outward; The arc-shaped output end is arranged on the output end corner; The two output end corners are respectively connected to the arc-shaped output end through flexible hinges; The two connecting end corners are respectively connected to the main frame and the slider through flexible hinges; The motor is specifically a stepper motor; The telescopic end is specifically a lead screw.

2. The active shock absorber according to claim 1, wherein The flexible hinges are all three-arc flexible hinges.

3. The active shock absorber according to any one of claims 1 or 2, characterized in that The main frame includes a first support plate and a second support plate; An installation cavity for installing the motor and the rhombic motion mechanism is formed between the first support plate and the second support plate; The motor is arranged on the second support plate; One connecting end corner of the rhombic motion mechanism is fixed on the first support plate.

4. The active shock absorber according to claim 3, characterized in that, The main frame further includes four support columns; The four support columns are clamped between the first support plate and the second support plate, and two symmetrical clamping rails are formed between adjacent support columns; The two output end corners are respectively arranged in the two clamping rails.

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