A damping plate is provided with a valve plate

Abstract

This invention discloses a silicone oil vibration damper with a valve plate mounted on a damping plate, comprising: an outer shell, and a shaft, a damping plate, a retaining ring, a rubber block, a first valve plate, and silicone oil disposed within the outer shell; the shaft, rubber block, and retaining ring are coaxially arranged from the inside to the outside and are in a tight fit with each other; the retaining ring is also connected to the outer shell; the damping plate is coaxially arranged with the shaft and located below the rubber block, and at least one guide hole is provided on the damping plate; the first valve plate covers the guide hole, and when the vertical vibration acceleration of the damping plate exceeds a set threshold, the force exerted by the silicone oil on the first valve plate pushes the first valve plate open, and the silicone oil flows in the outer shell through the guide hole and the annular gap between the outer shell and the damping plate. This invention, by providing a guide hole on the damping plate and a valve plate on the damping plate, allows the valve plate to throttle or allow the silicone oil to pass through under predetermined operating conditions, thereby improving the impact of vibrations in certain frequency bands on the damped object and enhancing comfort.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery, and specifically relates to a silicone oil shock absorber with valve plates mounted on a damping plate. Background Technology

[0002] Silicone oil shock absorbers have been successfully used in the vibration reduction of engineering machinery cabs. However, in terms of axial dynamic performance, under the same displacement, the dynamic stiffness of the shock absorber is higher during high-frequency vibration, and its ability to mitigate vibration is worse than that during low-frequency vibration, resulting in very poor comfort during high-frequency vibration. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a silicone oil shock absorber with valve plates mounted on a damping plate, which can reduce the dynamic stiffness of the shock absorber and improve comfort during high-frequency vibration.

[0004] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0005] A silicone oil shock absorber with a valve plate mounted on a damping plate includes: an outer shell, and a shaft, a damping plate, a retaining ring, a rubber block, a first valve plate, and silicone oil disposed within the outer shell;

[0006] The shaft core, rubber block, and retaining ring are arranged coaxially in sequence and are in close contact with each other.

[0007] The retaining ring is connected to the outer casing;

[0008] The damping plate is coaxially arranged with the shaft core and located below the rubber block. At least one guide hole is provided on the damping plate.

[0009] The first valve plate covers the flow guide hole. When the vertical vibration acceleration of the damping plate is greater than the set threshold, the force applied by the silicone oil to the first valve plate pushes the first valve plate open, and the silicone oil flows in the outer shell through the flow guide hole and the annular gap between the outer shell and the damping plate.

[0010] Optionally, when the vertical vibration acceleration of the damping plate is less than a set threshold, the force exerted by the silicone oil on the first valve plate cannot push the first valve plate open, and the silicone oil flows in the outer shell through the annular gap between the outer shell and the damping plate.

[0011] Optionally, the mating surfaces of the shaft core, rubber block, and retaining ring are bonded together by a vulcanization process after being coated with adhesive.

[0012] Optionally, the first valve plate is provided with a through hole, the shaft is located in the through hole, and the shaft is connected to the first valve plate.

[0013] Optionally, the number of guide holes on the damping plate is greater than 1, and the silicone oil shock absorber further includes a second valve plate. The second valve plate and the first valve plate are located on the upper and lower sides of the damping plate, respectively, and cover different guide holes. When the vertical vibration acceleration of the damping plate is greater than a set threshold, the force applied by the silicone oil to the second valve plate pushes the second valve plate open, and the silicone oil flows in the outer shell through the guide holes and the annular gap between the outer shell and the damping plate.

[0014] Optionally, the second valve plate is provided with a through hole, the shaft is located in the through hole, and the shaft is connected to the second valve plate.

[0015] Optionally, the damping plate has four guide holes, which are symmetrically arranged in pairs. The first valve plate blocks two of the symmetrically arranged guide holes on the upper side of the damping plate, and the second valve plate blocks the other two symmetrically arranged guide holes on the lower side of the damping plate.

[0016] Optionally, the thickness of the first valve plate and the second valve plate is 0.2mm-0.4mm.

[0017] Optionally, the cross-sectional dimension of the flow guide hole accounts for 1%-10% of the cross-sectional dimension of the damping plate.

[0018] Optionally, a groove is provided on the rubber block at a position corresponding to the flow guide hole on the damping plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention improves the impact of vibrations in certain frequency bands on the damped object and enhances comfort by setting guide holes on a damping plate and setting valve plates covering the guide holes on the damping plate, so that the valve plates can throttle or allow the silicone oil to pass through under predetermined working conditions.

[0021] This invention can change the dynamic vibration characteristics of the shock absorber for different frequency bands by changing the size and position of the guide hole; or by setting valve plates of different stiffness in the same shock absorber, so as to obtain a shock absorber that is more in line with actual use. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0023] Figure 1 This is a full cross-sectional view of a silicone oil shock absorber in one embodiment of the present invention, and a schematic diagram of the silicone oil flow direction when the valve plate is not in operation;

[0024] Figure 2 This is a 1 / 4 cross-sectional view of the shock absorber in one embodiment of the present invention;

[0025] Figure 3 This is the AA section view in Figure (1);

[0026] Figure 4 This is a cross-sectional view of BB in Figure (1);

[0027] Figure 5 This is a schematic diagram illustrating the direction of silicone oil flow when the vibration direction is upward.

[0028] Figure 6 This diagram illustrates the direction of silicone oil flow when the vibration direction is downward. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may include different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0031] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The application principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] A silicone oil shock absorber with valve plates mounted on a damping plate, such as Figure 1-2 As shown, it includes: an outer shell 1, and a shaft core 2, a damping plate 3, a retaining ring 4, a rubber block 5, a first valve plate 6a, and silicone oil 7 disposed in the outer shell;

[0035] The shaft core 2, the rubber block 5, and the retaining ring 4 are arranged coaxially from the inside to the outside, and are in a tight fit with each other.

[0036] The retaining ring 4 is connected to the outer shell 1;

[0037] The damping plate 3 is coaxially arranged with the shaft core 2 and located below the rubber block 5. At least one guide hole 301 is provided on the damping plate 3.

[0038] The first valve plate 6a covers the flow guide hole 301. When the vertical vibration acceleration of the damping plate 3 is greater than the set threshold, the force applied by the silicone oil 7 to the first valve plate 6a pushes the valve plate open, and the silicone oil 7 flows in the outer shell 1 through the flow guide hole 301 and the annular gap between the outer shell 1 and the damping plate 3. When the vertical vibration acceleration of the damping plate 3 is less than the set threshold, the force applied by the silicone oil 7 to the first valve plate 6a cannot push the first valve plate 6a open, and the silicone oil 7 flows in the outer shell 1 through the annular gap between the outer shell 1 and the damping plate 3, thereby controlling the unidirectional vibration.

[0039] The present invention provides a flow guide hole 301 on the damping plate 3 and a valve plate on the damping plate 3, so that the valve plate can throttle or pass the silicone oil under a predetermined working condition, thereby improving the impact of vibration in some frequency bands on the damped object and enhancing comfort.

[0040] The present invention can change the dynamic vibration characteristics of the shock absorber for different frequency bands by changing the size and position of the guide hole 301; or by setting valve plates of different stiffness in the same shock absorber, so as to obtain a shock absorber that is more in line with actual use.

[0041] In one specific implementation of this invention, in order to facilitate manufacturing and improve the performance stability of the product, the mating surfaces of the shaft core 2, the rubber block 5 and the retaining ring 4 are bonded together by a vulcanization process after being coated with adhesive.

[0042] In one specific implementation of an embodiment of the present invention, such as Figure 1 and 2 As shown, the first valve plate 6a is provided with a through hole, and the shaft core 2 is located in the through hole (that is, the shaft core 2 is coaxially arranged with the first valve plate 6a), and the shaft core 2 is connected to the first valve plate 6a. Specifically, the shaft core 2 and the first valve plate 6a can be riveted together.

[0043] In one specific implementation of an embodiment of the present invention, such as Figure 1 and 2 As shown, the damping plate 3 has more than one flow guide hole 301. The silicone oil damper also includes a second valve plate 6b. The second valve plate 6b and the first valve plate 6a are located on the upper and lower sides of the damping plate 3, respectively, and cover different flow guide holes 301. When the vertical vibration acceleration of the damping plate 3 exceeds a set threshold, the silicone oil 7 exerts a force on the second valve plate 6b to push it open. The silicone oil 7 flows in the outer shell 1 through the flow guide hole 301 and the annular gap between the outer shell 1 and the damping plate 3. At the same time, the silicone oil 7 exerts a force on the first valve plate 6a to push it open. The silicone oil 7 flows in the outer shell 1 through the flow guide hole 301 and the annular gap between the outer shell 1 and the damping plate 3, thus achieving bidirectional vibration control. Figure 5 This diagram illustrates the direction of silicone oil flow when the vibration direction is upward. Figure 6 This diagram illustrates the direction of silicone oil flow when the vibration direction is downward.

[0044] In one specific implementation of the present invention, the second valve plate 6b is provided with a through hole, the shaft core 2 is located in the through hole, and the shaft core 2 is connected to the second valve plate 6b (that is, the shaft core 2 and the second valve plate 6b are coaxially arranged). Specifically, the shaft core 2 and the second valve plate 6b can be riveted together.

[0045] In one specific implementation of an embodiment of the present invention, such as Figure 3-4 As shown, the damping plate 3 has four guide holes 301, which are arranged symmetrically in pairs. The first valve plate 6a blocks two of the symmetrically arranged guide holes 301 on the upper side of the damping plate 3, and the second valve plate 6b blocks the other two symmetrically arranged guide holes 301 on the lower side of the damping plate 3, so as to achieve bidirectional vibration control.

[0046] In one specific embodiment of the present invention, the thickness of the first valve plate 6a and the second valve plate 6b is 0.2mm-0.4mm. In this specific embodiment, valve plates of different stiffness are provided within the same shock absorber, thereby altering the dynamic vibration characteristics of the shock absorber for different frequency bands, resulting in a shock absorber that is more suitable for practical use.

[0047] In one specific implementation of this invention, the cross-sectional dimension of the guide hole 301 accounts for 1%-10% of the cross-sectional dimension of the damping plate 3. The damper's ability to cope with different working conditions can be adjusted by adjusting the area of ​​the guide hole.

[0048] In one specific implementation of the present invention, a groove is provided on the rubber block 5 at the position corresponding to the guide hole 301 on the damping plate 3. Adjusting the size and shape of this groove can change the static stiffness of the shock absorber. This groove can be designed in conjunction with the area of ​​the damping hole to give the shock absorber better damping characteristics.

[0049] In the specific implementation process, the mating surfaces of the three parts—shaft core 2, rubber block 5, and retaining ring 4—are coated with adhesive and bonded together through a vulcanization process. Then, the first valve plate 6a, damping plate 3, and second valve plate 6b are riveted to the shaft core 2. Finally, the assembly is pressed into the outer shell 1 containing an appropriate amount of silicone oil 7. The fixing lugs of the outer shell 1 are bent and pressed together with the retaining ring 4 to complete the assembly. The damping plate 3 has four evenly distributed guide holes 301. The first valve plate 6a blocks two of the opposite guide holes 301 on the upper side of the damping plate 3, and the second valve plate 6b blocks the other two guide holes 301 on the lower side of the damping plate 3. The damping plate 3 separates the outer shell 1 into upper and lower cavities.

[0050] In use, the silicone oil shock absorber proposed in this invention is installed on a platform through four mounting holes, and the object to be damped is installed on the shaft core 2. When the object to be damped applies vibration of the same amplitude but different frequencies to the shaft core 2: when the applied vibration frequency is low, the vertical vibration acceleration of the damping plate 3 is small, and the force of the silicone oil 7 applied to the first valve plate 6a or the second valve plate 6b is insufficient to open the first valve plate 6a or the second valve plate 6b. At this time, the silicone oil 7 flows in the upper and lower cavities through the annular gap between the outer shell 1 and the damping plate 3. When the applied vibration frequency is high, the vertical vibration acceleration of the damping plate 3 is large, and the force of the silicone oil 7 applied to the first valve plate 6a and / or the second valve plate 6b can open the first valve plate 6a and / or the second valve plate 6b. At this time, the silicone oil 7 can flow in the upper and lower cavities through the guide hole 301 and the annular gap between the outer shell 1 and the damping plate 3. The flow cross section increases, the dynamic stiffness decreases, and under the same conditions, the acceleration of the shaft core 2 is smaller than that of the shock absorber without valve plates, thus improving human comfort.

[0051] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A silicone oil shock absorber with a valve plate mounted on a damping plate, characterized in that, include: The outer casing (1), and the shaft core (2), damping plate (3), retaining ring (4), rubber block (5), first valve plate (6a) and silicone oil (7) disposed in the outer casing (1); The shaft core (2), the rubber block (5) and the retaining ring (4) are arranged coaxially from the inside to the outside, and are in a close fit with each other. The retaining ring (4) is also connected to the outer shell (1); The damping plate (3) is coaxially arranged with the shaft core (2) and located below the rubber block (5). At least one guide hole (301) is provided on the damping plate (3). The first valve plate (6a) covers the flow guide hole (301). When the vertical vibration acceleration of the damping plate (3) is greater than the set threshold, the force applied by the silicone oil (7) to the first valve plate (6a) pushes the first valve plate (6a) open. The silicone oil (7) flows in the outer shell (1) through the flow guide hole (301), the annular gap between the outer shell (1) and the damping plate (3). The number of guide holes (301) on the damping plate (3) is greater than 1. The silicone oil shock absorber also includes a second valve plate (6b). The second valve plate (6b) and the first valve plate (6a) are located on the upper and lower sides of the damping plate (3) respectively, and cover different guide holes (301). When the vertical vibration acceleration of the damping plate (3) is greater than the set threshold, the force applied by the silicone oil (7) to the second valve plate (6b) pushes open the second valve plate (6b), and the silicone oil (7) flows in the outer shell (1) through the guide hole (301), the annular gap between the outer shell (1) and the damping plate (3); By installing valve plates of different stiffness within the same shock absorber, the dynamic vibration characteristics of the shock absorber for vibrations in different frequency bands can be altered.

2. A silicone oil shock absorber with a valve plate mounted on a damping plate according to claim 1, characterized in that: When the vertical vibration acceleration of the damping plate (3) is less than the set threshold, the force of the silicone oil (7) applied to the first valve plate (6a) cannot push the first valve plate (6a) open, and the silicone oil (7) flows in the outer shell (1) through the annular gap between the outer shell (1) and the damping plate (3).

3. A silicone oil shock absorber with a valve plate mounted on a damping plate according to claim 1, characterized in that: The mating surfaces of the shaft core (2), the rubber block (5) and the retaining ring (4) are bonded together by a vulcanization process after being coated with adhesive.

4. A silicone oil shock absorber with a valve plate mounted on a damping plate according to claim 1, characterized in that: The first valve plate (6a) is provided with a through hole, the shaft core (2) is located in the through hole, and the shaft core (2) is connected to the first valve plate (6a).

5. A silicone oil shock absorber with a valve plate mounted on a damping plate according to claim 1, characterized in that: The number of guide holes (301) on the damping plate (3) is greater than 1. The silicone oil shock absorber also includes a second valve plate (6b). The second valve plate (6b) and the first valve plate (6a) are located on the upper and lower sides of the damping plate (3) respectively, and cover different guide holes (301). When the vertical vibration acceleration of the damping plate (3) is greater than the set threshold, the force applied by the silicone oil (7) to the second valve plate (6b) pushes the second valve plate (6b) open, and the silicone oil (7) flows in the outer shell (1) through the guide hole (301), the annular gap between the outer shell (1) and the damping plate (3).

6. A silicone oil shock absorber with a valve plate mounted on a damping plate according to claim 5, characterized in that: The second valve plate (6b) is provided with a through hole, the shaft core (2) is located in the through hole, and the shaft core (2) is connected to the second valve plate (6b).

7. A silicone oil shock absorber with a valve plate mounted on a damping plate according to claim 5 or 6, characterized in that: The damping plate (3) has four guide holes (301), which are arranged symmetrically in pairs. The first valve plate (6a) blocks two of the symmetrically arranged guide holes (301) on the upper side of the damping plate (3), and the second valve plate (6b) blocks the other two symmetrically arranged guide holes (301) on the lower side of the damping plate (3).

8. A silicone oil shock absorber with a valve plate mounted on a damping plate according to claim 1, characterized in that: The thickness of the first valve plate (6a) and the second valve plate (6b) is 0.2mm-0.4mm.

9. A silicone oil shock absorber with a valve plate mounted on a damping plate according to claim 1, characterized in that: The cross-sectional dimension of the flow guide hole (301) accounts for 1%-10% of the cross-sectional dimension of the damping plate (3).

10. A silicone oil shock absorber with a valve plate mounted on a damping plate according to claim 1, characterized in that: The rubber block (5) has a groove at the position corresponding to the guide hole (301) on the damping plate (3).

Images