A bottom valve and variable damping shock absorber

Abstract

This utility model discloses a bottom valve, including a valve seat; the valve seat includes a first circular protrusion and a second circular protrusion arranged coaxially, the diameter of the first circular protrusion being smaller than the diameter of the second circular protrusion; this utility model also discloses a variable damping shock absorber, including a bottom valve, an intermediate cylinder, and a working cylinder, the first circular protrusion being clearance-fitted to the end of the working cylinder and combined with the end face of the second circular protrusion for end positioning of the working cylinder; the second circular protrusion being interference-fitted to the end of the intermediate cylinder, thereby sealing and fixing the end of the intermediate cylinder. The bottom valve provided by this utility model has a simple valve seat structure to process, and its assembly in the variable damping shock absorber does not require the intervention of additional sealing components, effectively simplifying the complexity of the overall structure of the variable damping shock absorber, and effectively reducing cost input and assembly difficulty.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper technology, and in particular to a bottom valve and a variable damping vibration damper. Background Technology

[0002] In the field of electromagnetic variable channel variable damping electronically controlled shock absorbers, a bypass is usually used to realize the flow of damping oil in the shock absorber, so that the damping of the shock absorber can be actively controlled in the bypass channel, and the variable damping can meet the needs of the whole vehicle.

[0003] To achieve the bypass configuration described above, a bottom valve needs to be installed at the bottom of the shock absorber. However, the bottom valves currently used in shock absorbers typically require a large number of seals for installation. Furthermore, the end of the intermediate cylinder used in conjunction with this valve requires a spinning and stamping process to expand the seal mounting groove. This results in a highly complex overall structure for the shock absorber, cumbersome assembly procedures, and high costs.

[0004] Based on this, the present invention proposes a bottom valve and a variable damping shock absorber to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a bottom valve and a variable damping shock absorber, so as to simplify the overall structural complexity of the shock absorber, reduce assembly difficulty and cost.

[0006] To solve the above-mentioned technical problems, this utility model provides a bottom valve, including a valve seat. The valve seat includes a first circular protrusion and a second circular protrusion arranged coaxially. The diameter of the first circular protrusion is smaller than the diameter of the second circular protrusion, and the first circular protrusion and the second circular protrusion are integrally formed.

[0007] Furthermore, the second circular protrusion has multiple protrusion blocks distributed at circumferential intervals around its end face away from the first circular protrusion, and the adjacent protrusion blocks form a second fluid channel.

[0008] Furthermore, the outer wall of the protrusion includes a smooth area and an inward-curving area. The smooth area smoothly transitions to the second circular protrusion sidewall, and the inward-curving area bends inward toward the protrusion to form an arc-shaped structure.

[0009] Furthermore, a rounded transition is used between the smooth area and the concave area.

[0010] Furthermore, the second circular protrusion has an inclined sidewall, forming an inclination angle α, the value of which is in the range of 2°-3°.

[0011] This utility model also provides a variable damping shock absorber, including the bottom valve, intermediate cylinder and working cylinder as described above;

[0012] The working cylinder is located inside the intermediate cylinder and is coaxially arranged with the intermediate cylinder;

[0013] The first circular protrusion gap fits with the end of the working cylinder and, together with the end face of the second circular protrusion, positions the end of the working cylinder.

[0014] The second circular protrusion is interference-fitted with the end of the intermediate cylinder, thereby sealing and fixing the end of the intermediate cylinder.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The bottom valve provided by this utility model has a simple valve seat structure that is easy to process, and its assembly in the variable damping shock absorber does not require the intervention of additional sealing components, which effectively simplifies the complexity of the overall structure of the variable damping shock absorber and effectively reduces cost and assembly difficulty. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the variable damping vibration damper in the embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the bottom valve in an embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional schematic diagram of the valve seat in an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the structural distribution of the protrusions in an embodiment of this utility model. Detailed Implementation

[0021] The bottom valve and variable damping shock absorber of this utility model will be described in more detail below with reference to the schematic diagrams, which illustrate preferred embodiments of this utility model. It should be understood that those skilled in the art can modify the utility model described herein while still achieving the advantageous effects of this utility model. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit this utility model.

[0022] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0023] Example 1

[0024] like Figure 1As shown in the figure, this utility model embodiment proposes a bottom valve, which includes a valve seat 1. The valve seat 1 includes a first circular protrusion 011 and a second circular protrusion 012 arranged coaxially. The diameter of the first circular protrusion 011 is smaller than the diameter of the second circular protrusion 012, and the first circular protrusion 011 and the second circular protrusion 012 are integrally formed.

[0025] In this embodiment, the main body of the valve seat 1 can be machined from a columnar part, resulting in a simple structure. Referring to the reference... Figure 2 When installing the bottom valve, since the valve seat 1 adopts a double-stage frustum design, the first circular protrusion 011 can be fitted with the end of the working cylinder a with clearance, and the end face of the second circular protrusion 012 can be used to position the working cylinder a of the variable damping damper. At the same time, the second circular protrusion 012 is used to interfere with the end of the intermediate cylinder b of the variable damping damper, so that the end of the intermediate cylinder b of the variable damping damper can be sealed and fixed, that is, no additional sealing parts are required. Therefore, the end of the intermediate cylinder b does not need to be processed by spinning and pressurizing, which effectively simplifies the complexity of the overall structure of the variable damping damper and effectively reduces the cost and assembly difficulty.

[0026] In the above embodiment, the valve seat 1 has a first fluid channel 013 in the middle, and a valve core 2 for controlling the opening and closing of the first fluid channel 013 is elastically installed at the center of the end face of the first circular protrusion 011.

[0027] Specifically, the valve core 2, in conjunction with the preload spring (or elastic element), dynamically opens or closes the first fluid channel 013 or adjusts its opening degree based on the oil pressure difference generated by the piston's movement speed (acceleration).

[0028] In the above embodiment, the second circular protrusion 012 has a plurality of protrusion blocks 014 distributed at circumferential intervals around the end face of the second circular protrusion 012 away from the first circular protrusion 011. The adjacent protrusion blocks 014 form a second fluid channel 015. The protrusion blocks 014 and the second circular protrusion 012 are integrally formed to ensure the processing efficiency of the valve seat 1.

[0029] Preferred, in conjunction with reference Figure 4 The outer wall of the protrusion 014 includes a smooth area x1 and an inward-curving area x2. The smooth area x1 smoothly transitions to the side wall of the second circular protrusion 012. The inward-curving area x2 bends inward toward the protrusion 014 to form an arc surface structure. The radius of the arc surface structure is R2.

[0030] Furthermore, the smooth area x1 and the concave area x2 are transitioned by a rounded corner R1.

[0031] By setting the smooth area x1, the inward area x2, and the rounded corner R1, the smoothness of the valve seat 1 assembly process is improved while ensuring the good performance of the second fluid channel 015 after valve seat 1 is assembled.

[0032] In a preferred embodiment, in conjunction with reference to Figure 3 The second circular protrusion 012 has an inclined sidewall forming an angle α. This allows the second circular protrusion 012 to generate radial pressure on the mating surface when it is interference-fitted with the intermediate cylinder b of the variable damping shock absorber. This makes assembly easier to a certain extent, provides a certain axial positioning and anti-loosening capability, and provides a certain degree of assembly freedom, allowing the intermediate cylinder b to have a certain degree of freedom in the length direction.

[0033] Preferably, the value of α is in the range of 2°-3° to ensure good installation stability and sealing between valve seat 1 and intermediate cylinder b of variable damping shock absorber.

[0034] Example 2

[0035] Combined with reference Figure 2 This embodiment provides a variable damping shock absorber, including a bottom valve, a working cylinder a, and an intermediate cylinder b as described in Embodiment 1.

[0036] Specifically, the working cylinder a is located inside the intermediate cylinder b and is coaxially arranged with the intermediate cylinder b; the first circular protrusion 011 is clearance-fitted to the end of the working cylinder a and combined with the end face of the second circular protrusion 012 to position the working cylinder a; the second circular protrusion 012 is interference-fitted to the end of the intermediate cylinder b, so that the end of the intermediate cylinder b is sealed and fixed.

[0037] In this embodiment, the main body of the valve seat 1 of the bottom valve can be machined by cutting a columnar part, which simplifies the structure. At the same time, the sealing of the end of the intermediate cylinder b does not require the intervention of an additional sealing component. Therefore, the end of the intermediate cylinder b does not need to be machined by spinning and pressurizing, which effectively simplifies the complexity of the overall structure of the variable damping shock absorber and effectively reduces the cost and assembly difficulty.

[0038] In summary, compared with the prior art, this utility model has at least the following advantages:

[0039] The bottom valve provided by this utility model has a simple valve seat structure that is easy to process, and its assembly in the variable damping shock absorber does not require the intervention of additional sealing components, which effectively simplifies the complexity of the overall structure of the variable damping shock absorber and effectively reduces cost and assembly difficulty.

[0040] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A bottom valve, characterized in that, Including valve seat; The valve seat includes a first circular protrusion and a second circular protrusion arranged coaxially. The diameter of the first circular protrusion is smaller than the diameter of the second circular protrusion, and the first circular protrusion and the second circular protrusion are integrally formed.

2. The bottom valve as described in claim 1, characterized in that, The second circular protrusion has multiple protrusion blocks distributed at circumferential intervals around its end face away from the first circular protrusion, and the adjacent protrusion blocks form a second fluid channel.

3. The bottom valve as described in claim 2, characterized in that, The outer wall of the protrusion includes a smooth area and an inward-curving area. The smooth area transitions smoothly with the second circular protrusion sidewall, and the inward-curving area bends inward toward the protrusion to form an arc-shaped structure.

4. The bottom valve as described in claim 3, characterized in that, The smooth area and the inward-facing area are transitioned with rounded corners.

5. The bottom valve as described in claim 1, characterized in that, The second circular protrusion has an inclined sidewall, forming an inclination angle α, the value of which is in the range of 2°-3°.

6. A variable damping vibration damper, characterized in that, Includes the bottom valve, intermediate cylinder, and working cylinder as described in any one of claims 1-5; The working cylinder is located inside the intermediate cylinder and is coaxially arranged with the intermediate cylinder; The first circular protrusion gap fits with the end of the working cylinder and, together with the end face of the second circular protrusion, positions the end of the working cylinder. The second circular protrusion is interference-fitted with the end of the intermediate cylinder, thereby sealing and fixing the end of the intermediate cylinder.

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