Vibration isolator with adjustable rigidity and damping

Abstract

The utility model discloses a rigidity and damping adjustable vibration isolator, and belongs to the technical field of mechanical vibration isolation, the rigidity and damping adjustable vibration isolator comprises a first main body connecting piece and a second main body connecting piece, and the first main body connecting piece and the second main body connecting piece are fixedly connected with four first springs; the first main body connecting piece and the second main body connecting piece are used for supporting and connecting other parts, the first spring is used for providing elastic force needed by vibration isolation, and the piston rod, the working piston, the first damping circulation hole, the rotating rod, the adjusting plate and the second damping circulation hole are matched; the size of the damping circulation hole formed by combining the second damping circulation hole and the first damping circulation hole is adjusted, namely the overall damping size of the damping element body can be adjusted, and continuous adjustment of rigidity is achieved by arranging the rigidity adjusting device to change the pre-tightening force or the effective working length of the first spring. Through combined use of the devices, flexible adjustment of positive rigidity, negative rigidity and damping can be achieved, and different vibration isolation requirements are met.

Description

Technical Field

[0001] This application relates to the technical field of mechanical vibration isolation, and particularly relates to a vibration isolator with adjustable stiffness and damping. Background Art

[0002] With the development of technology, more mechanical equipment has been applied in human production and life. While providing great convenience for human production and life, the vibration generated by mechanical equipment also has a great impact on the environment. At present, vibration isolation technology has been widely used in various industrial fields to reduce the impact of vibration on equipment performance and service life.

[0003] Traditional vibration isolators often adjust their stiffness and damping characteristics by changing material properties, structural shapes or adding damping elements. However, these methods have limited adjustment ranges in practical applications and cannot flexibly adapt to different vibration isolation requirements and vibration environments. Therefore, improvements are now made to a vibration isolator with adjustable stiffness and damping. Utility Model Content

[0004] Aiming at the deficiencies of the prior art, this application provides a vibration isolator with adjustable stiffness and damping, which overcomes the deficiencies of the prior art and aims to solve the problem that traditional vibration isolators have limited adjustment ranges in practical applications and cannot flexibly adapt to different vibration isolation requirements and vibration environments.

[0005] To achieve the above object, this application provides the following technical solution: A vibration isolator with adjustable stiffness and damping includes a first main body connecting piece and a second main body connecting piece. Four first springs are fixedly connected between the first main body connecting piece and the second main body connecting piece, and a stiffness adjustment device is arranged between any two adjacent first springs. A damping element main body is fixedly installed at the central position of the upper surface of the first main body connecting piece. The damping element main body includes a fixed cylinder, an oil storage tank, a sleeved cylinder and a positioning plate. The inside of the oil storage tank is filled with damping liquid. A piston rod is fixedly connected to the central position of the lower surface of the positioning plate. The lower end of the piston rod penetrates through the fixed cylinder and is inserted into the inside of the oil storage tank and fixedly connected with a working piston. A first damping flow hole is formed through the upper surface of the working piston. A rotating rod is rotatably connected to the inside of the piston rod. A regulating plate is fixedly connected to the lower end of the rotating rod. A second damping flow hole is formed through the upper surface of the regulating plate, and the top of the regulating plate is in contact with the bottom of the working piston.

[0006] By adopting the above technical solution, the main connecting piece one and the main connecting piece two are provided to facilitate the support and connection of other components. The first spring is provided to provide the elastic force required for vibration isolation. Through the cooperation among the piston rod, the working piston, the first damping flow hole, the rotating rod, the adjusting plate and the second damping flow hole, the size of the damping flow hole formed by the combination of the two groups of the second damping flow hole and the first damping flow hole can be adjusted, that is, the overall damping of the damping element body can be adjusted. By setting the stiffness adjusting device to change the pre-tightening force or the effective working length of the first spring, the continuous adjustment of the stiffness can be realized. By combining and using these devices, the flexible adjustment of the positive stiffness, negative stiffness and damping can be realized to meet different vibration isolation requirements.

[0007] As a preferred technical solution of the present application, the number of the first damping flow holes and the second damping flow holes is four each and they correspond one by one. The four first damping flow holes are uniformly distributed in a circular array on the upper surface of the working piston. The four second damping flow holes are uniformly distributed in a circular array on the upper surface of the adjusting plate, and the arc length of the second damping flow hole is greater than the arc length of the first damping flow hole.

[0008] By adopting the above technical solution, by combining the first damping flow hole and the second damping flow hole together to form a new damping flow hole, that is, the size of the damping flow hole can be changed by adjusting the combination mode of the working piston and the adjusting plate.

[0009] As a preferred technical solution of the present application, the positioning plate is fixedly installed inside the socket cylinder, and a motor is fixedly installed at the center position of the upper surface of the positioning plate. The upper end of the rotating rod is fixedly connected with the output end of the motor.

[0010] By adopting the above technical solution, the motor drives the rotating rod to rotate, driving the adjusting plate to rotate synchronously, so as to adjust the size of the damping flow hole formed by the combination of the two groups of the second damping flow hole and the first damping flow hole.

[0011] As a preferred technical solution of the present application, the bottom of the fixed cylinder is fixedly connected with the top of the main connecting piece one, the top of the socket cylinder is fixedly connected with the bottom of the main connecting piece two, and the fixed cylinder is adapted to the socket cylinder.

[0012] By adopting the above technical solution, by setting the fixed cylinder and the socket cylinder, the main connecting piece one, the main connecting piece two and the damping element body are combined together for vibration isolation.

[0013] As a preferred technical solution of the present application, a sealing plug is fixedly installed above the working piston inside the fixed cylinder, and the outer diameter of the sealing plug is adapted to the inner diameter of the oil storage tank.

[0014] By adopting the above technical solution, the sealing plug is provided to ensure the sealing performance of the damping element body during operation.

[0015] As a preferred technical solution of the present application, the stiffness adjusting device includes a fixed rod fixedly installed on the upper surface of the first main body connecting member. A connecting rod is slidably inserted into the interior of the fixed rod. The upper end of the connecting rod is fixedly connected to the lower surface of the second main body connecting member. A movable ring is slidably sleeved on the outer surface of the fixed rod. A knob is arranged below the movable ring on the outer surface of the fixed rod. A fixed ring is fixedly sleeved on the outer surface of the connecting rod, and a second spring is fixedly connected between the movable ring and the fixed ring.

[0016] By adopting the above technical solution, through the cooperation among the knob, the fixed ring, the movable ring and the second spring, it is convenient to adjust the depth of insertion of the connecting rod into the fixed rod. Since the connecting rod and the fixed rod are respectively fixedly connected to the second main body connecting member and the first main body connecting member, the distance between the second main body connecting member and the first main body connecting member can be adjusted, so that the pre-tightening force or the effective working length of the first spring can be changed to achieve continuous adjustment of the stiffness.

[0017] As a preferred technical solution of the present application, an external thread is arranged at a position near the lower end of the outer surface of the fixed rod. The fixed rod is threadedly connected to the knob through the external thread, and the top of the knob abuts against the bottom of the movable ring.

[0018] By adopting the above technical solution, the movable ring is squeezed by screwing the knob to facilitate the adjustment of its position, so as to squeeze the second spring, that is, the depth of insertion of the connecting rod into the fixed rod can be adjusted.

[0019] The beneficial effects of the present application are as follows:

[0020] In the present utility model, the first main body connecting member and the second main body connecting member are provided to facilitate the support and connection of other components. The first spring is provided to provide the elastic force required for vibration isolation. Through the cooperation among the piston rod, the working piston, the first damping flow hole, the rotating rod, the adjusting plate and the second damping flow hole, it is convenient to adjust the size of the damping flow hole formed by the combination of the second damping flow hole and the first damping flow hole, that is, the overall damping size of the damping element body can be adjusted. By setting the stiffness adjusting device to change the pre-tightening force or the effective working length of the first spring to achieve continuous adjustment of the stiffness, through the combined use of these devices, flexible adjustment of positive stiffness, negative stiffness and damping can be realized to meet different vibration isolation requirements.

[0021] Referring to the following description and the accompanying drawings, specific embodiments of the present utility model are disclosed in detail, indicating the ways in which the principles of the present utility model can be adopted. It should be understood that the embodiments of the present utility model are not limited in scope thereby. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is a schematic diagram of the composition structure of the damping element body of the present application;

[0024] Figure 3 is a schematic diagram of the partial structure of the present application;

[0025] Figure 4 is a schematic diagram of the composition structure of the stiffness adjustment device of the present application.

[0026] In the figure: 1. First main body connecting piece; 2. Second main body connecting piece; 3. First spring; 4. Damping element body; 41. Fixed cylinder; 42. Oil storage tank; 43. Sealing plug; 44. Socket cylinder; 45. Positioning plate; 46. Working piston; 47. Adjusting plate; 48. Piston rod; 49. First damping flow hole; 410. Second damping flow hole; 411. Rotating rod; 412. Motor; 5. Stiffness adjustment device; 51. Fixed rod; 52. Connecting rod; 53. External thread; 54. Knob; 55. Movable ring; 56. Second spring; 57. Fixed ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] Such as Figure 1 - Figure 4As shown in the figure, a vibration isolator with adjustable stiffness and damping provided in this embodiment includes a first main body connecting member 1 and a second main body connecting member 2. Four first springs 3 are fixedly connected between the first main body connecting member 1 and the second main body connecting member 2, and a stiffness adjusting device 5 is arranged between any two adjacent first springs 3. A damping element main body 4 is fixedly installed at the center of the upper surface of the first main body connecting member 1. The damping element main body 4 includes a fixed cylinder 41, an oil storage tank 42, a socket cylinder 44, and a positioning plate 45. The inside of the oil storage tank 42 is filled with damping fluid. A piston rod 48 is fixedly connected to the center of the lower surface of the positioning plate 45. The lower end of the piston rod 48 penetrates through the fixed cylinder 41 and is inserted into the inside of the oil storage tank 42 and fixedly connected to a working piston 46. A first damping flow hole 49 is formed through the upper surface of the working piston 46. A rotating rod 411 is rotatably connected inside the piston rod 48. A regulating plate 47 is fixedly connected to the lower end of the rotating rod 411. A second damping flow hole 410 is formed through the upper surface of the regulating plate 47. The top of the regulating plate 47 is in contact with the bottom of the working piston 46. During use, the first main body connecting member 1 and the second main body connecting member 2 are provided to facilitate the support and connection of other components. The first springs 3 are provided to provide the elastic force required for vibration isolation. Through the cooperation among the piston rod 48, the working piston 46, the first damping flow hole 49, the rotating rod 411, the regulating plate 47, and the second damping flow hole 410, the size of the damping flow hole formed by the combination of the two groups of the second damping flow hole 410 and the first damping flow hole 49 can be adjusted, that is, the overall damping of the damping element main body 4 can be adjusted. By setting the stiffness adjusting device 5 to change the pre-tightening force or the effective working length of the first springs 3, continuous adjustment of the stiffness can be achieved. By using these devices in combination, flexible adjustment of positive stiffness, negative stiffness, and damping can be realized to meet different vibration isolation requirements.

[0029] In this embodiment, as Figure 2 and 3 shown, the number of the first damping flow holes 49 and the second damping flow holes 410 is four and they correspond one by one. The four first damping flow holes 49 are evenly distributed in a circular array on the upper surface of the working piston 46. The four second damping flow holes 410 are evenly distributed in a circular array on the upper surface of the regulating plate 47. The arc length of the second damping flow hole 410 is greater than the arc length of the first damping flow hole 49. During use, by combining the first damping flow hole 49 and the second damping flow hole 410 to form a new damping flow hole, the size of the damping flow hole can be changed by adjusting the combination mode of the working piston 46 and the regulating plate 47.

[0030] In this embodiment, as Figure 2 and 3As shown, the positioning plate 45 is fixedly installed inside the socket cylinder 44, and a motor 412 is fixedly installed at the center of the upper surface of the positioning plate 45. The upper end of the rotating rod 411 is fixedly connected to the output end of the motor 412. During use, the motor 412 drives the rotating rod 411 to rotate, driving the adjusting plate 47 to rotate synchronously, so as to adjust the size of the damping flow holes formed by the combination of the two damping flow holes II 410 and the damping flow holes I 49.

[0031] In this embodiment, as Figure 1 and 2 shown, the bottom of the fixed cylinder 41 is fixedly connected to the top of the main body connecting piece I 1, and the top of the socket cylinder 44 is fixedly connected to the bottom of the main body connecting piece II 2. The fixed cylinder 41 and the socket cylinder 44 are adapted to each other. During use, by setting the fixed cylinder 41 and the socket cylinder 44, the main body connecting piece I 1, the main body connecting piece II 2 and the damping element main body 4 are combined together for vibration isolation.

[0032] In this embodiment, as Figure 2 shown, a sealing plug 43 is fixedly installed above the working piston 46 inside the fixed cylinder 41. The outer diameter of the sealing plug 43 is adapted to the inner diameter of the oil storage tank 42. During use, by setting the sealing plug 43, the sealing performance of the damping element main body 4 during operation is ensured.

[0033] In this embodiment, as Figure 4 shown, the stiffness adjustment device 5 includes a fixed rod 51 fixedly installed on the upper surface of the main body connecting piece I 1. A connecting rod 52 is slidably inserted inside the fixed rod 51. The upper end of the connecting rod 52 is fixedly connected to the lower surface of the main body connecting piece II 2. A movable ring 55 is slidably sleeved on the outer surface of the fixed rod 51. A knob 54 is arranged below the movable ring 55 on the outer surface of the fixed rod 51. A fixed ring 57 is fixedly sleeved on the outer surface of the connecting rod 52. A second spring 56 is fixedly connected between the movable ring 55 and the fixed ring 57. During use, through the cooperation between the knob 54, the fixed ring 57, the movable ring 55 and the second spring 56, it is convenient to adjust the depth of the connecting rod 52 inserted into the fixed rod 51. Since the connecting rod 52 and the fixed rod 51 are respectively fixedly connected to the main body connecting piece II 2 and the main body connecting piece I 1, the distance between the main body connecting piece II 2 and the main body connecting piece I 1 can be adjusted, so as to change the pre-tightening force or the effective working length of the first spring 3 to achieve continuous adjustment of the stiffness.

[0034] In this embodiment, as Figure 4As shown in the figure, an external thread 53 is provided at a position near the lower end of the outer surface of the fixed rod 51. The fixed rod 51 is threadedly connected to the knob 54 through the external thread 53. The top of the knob 54 abuts against the bottom of the movable ring 55. During use, the movable ring 55 is squeezed by turning the knob 54 to facilitate the adjustment of its position, thereby squeezing the second spring 56, that is, the depth of the connecting rod 52 inserted into the fixed rod 51 can be adjusted.

[0035] Working principle: When using a vibration isolator with adjustable stiffness and damping of the present application, the main body connecting piece 1 and the main body connecting piece 2 are provided to facilitate the support and connection of other components. The first spring 3 is provided to provide the elastic force required for vibration isolation. Through the cooperation between the piston rod 48, the working piston 46, the first damping flow hole 49, the rotating rod 411, the adjusting plate 47 and the second damping flow hole 410, the size of the damping flow hole formed by the combination of the two groups of the second damping flow hole 410 and the first damping flow hole 49 can be adjusted, that is, the overall damping of the damping element main body 4 can be adjusted. By setting the stiffness adjusting device 5 to change the pre-tightening force or the effective working length of the first spring 3, continuous adjustment of the stiffness can be achieved. By using these devices in combination, flexible adjustment of positive stiffness, negative stiffness and damping can be realized to meet different vibration isolation requirements.

[0036] The above are only the preferred embodiments of the present application and are not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. 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. A vibration isolator with adjustable stiffness and damping, comprising a main body connecting member 1 (1) and a main body connecting member 2 (2), characterized in that: The main body connecting member 1 (1) and the main body connecting member 2 (2) are fixedly connected with four springs 1 (3), and a stiffness adjusting device (5) is provided between any two adjacent springs 1 (3). A damping element body (4) is fixedly installed at a central position on the upper surface of the main body connecting member 1 (1). The damping element body (4) comprises a fixing cylinder (41), an oil storage tank (42), a sleeve cylinder (44) and a positioning plate (45). The oil storage tank (42) is filled with damping fluid. A piston rod (48) is fixedly connected at a central position on the lower surface of the positioning plate (45). ), the lower end of the piston rod (48) passes through the fixed cylinder (41) and is inserted into the interior of the oil storage tank (42) and is fixedly connected to the working piston (46); the upper surface of the working piston (46) is provided with a damping flow hole 1 (49); the interior of the piston rod (48) is rotatably connected to a rotating rod (411); the lower end of the rotating rod (411) is fixedly connected to an adjustment plate (47); the upper surface of the adjustment plate (47) is provided with a damping flow hole 2 (410), and the top of the adjustment plate (47) is in contact with the bottom of the working piston (46).

2. A vibration isolator with adjustable stiffness and damping according to claim 1, characterized in that: The number of the damping circulation holes one (49) and the number of the damping circulation holes two (410) are both four and correspond one to one. The four damping circulation holes one (49) are evenly distributed in a circular array on the upper surface of the working piston (46), and the four damping circulation holes two (410) are evenly distributed in a circular array on the upper surface of the adjustment plate (47), and the arc length of the damping circulation hole two (410) is greater than the arc length of the damping circulation hole one (49).

3. A vibration isolator with adjustable stiffness and damping according to claim 1, characterized in that: The positioning plate (45) is fixedly mounted inside the sleeve (44), and a motor (412) is fixedly mounted at a central position on the upper surface of the positioning plate (45), and the upper end of the rotating rod (411) is fixedly connected to the output end of the motor (412).

4. The vibration isolator with adjustable stiffness and damping according to claim 1, characterized in that: The bottom of the fixed cylinder (41) is fixedly connected to the top of the first main connecting member (1), the top of the sleeve cylinder (44) is fixedly connected to the bottom of the second main connecting member (2), and the fixed cylinder (41) and the sleeve cylinder (44) are compatible.

5. The vibration isolator with adjustable stiffness and damping according to claim 1, characterized in that: A sealing plug (43) is fixedly mounted inside the fixed cylinder (41) above the working piston (46), and the outer diameter of the sealing plug (43) matches the inner diameter of the oil storage tank (42).

6. The vibration isolator with adjustable stiffness and damping according to claim 1, characterized in that: The stiffness adjustment device (5) comprises a fixed rod (51) fixedly mounted on the upper surface of the main connecting member 1 (1); a connecting rod (52) is slidably inserted into the interior of the fixed rod (51); the upper end of the connecting rod (52) is fixedly connected to the lower surface of the main connecting member 2 (2); a movable ring (55) is slidably sleeved on the outer surface of the fixed rod (51); a knob (54) is provided on the outer surface of the fixed rod (51) below the movable ring (55); a fixed ring (57) is fixedly sleeved on the outer surface of the connecting rod (52); and a second spring (56) is fixedly connected between the movable ring (55) and the fixed ring (57).

7. A vibration isolator with adjustable stiffness and damping according to claim 6, characterized in that: An external thread (53) is provided on the outer surface of the fixing rod (51) near the lower end. The fixing rod (51) is threadably connected to the knob (54) via the external thread (53). The top of the knob (54) abuts against the bottom of the movable ring (55).

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