Double-valve shock absorber

Abstract

The invention discloses a double-valve shock absorber which comprises a guider assembly, a first middle cylinder assembly, a piston rod assembly, a working cylinder assembly, a first electromagnetic valve assembly, a second electromagnetic valve assembly, a first bottom valve assembly, a second middle cylinder assembly, an oil barrel assembly and a second bottom valve assembly. Compared with a double-valve shock absorber in the prior art that two electromagnetic valve assemblies are both arranged on the side face of an oil cylinder assembly, one electromagnetic valve assembly is arranged at the bottom of the oil cylinder assembly, and the situation that the side face of the space of an automobile chassis is limited can be better adapted; the second bottom valve assembly of a special structure is adopted, liquid located in the working cylinder assembly and located in front of the piston is communicated with the third space in the radial direction, and the liquid located in the working cylinder assembly and located in front of the piston is communicated with a path of a liquid inlet of the second electromagnetic valve assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shock absorber, and particularly relates to a double-valve shock absorber. BACKGROUND

[0002] In the automobile industry, the early single-valve CDC realizes the damping change by adjusting on a single valve body, but the adjusting range and the fine processing ability for different frequency vibrations are limited; the double-valve CDC shock absorber is developed in order to achieve the optimal performance in a wider working condition (such as low-speed fine jolt and high-speed severe vibration); the current automobile chassis equipped with the double-valve shock absorber is mostly the multi-link independent suspension, the inner side space of the automobile chassis is limited, and with the increasing complexity of the automobile chassis, the side space of the automobile chassis will be smaller and smaller, so the side layout mode of the double-valve double-intermediate-cylinder CDC shock absorber will be difficult to completely meet the limitation of insufficient chassis space. Figure 1 As shown in the prior art double-valve CDC shock absorber, the double-valve CDC shock absorber comprises a guide assembly 1, a first intermediate cylinder assembly 2, a piston rod assembly 3, a working cylinder assembly 4, a first electromagnetic valve assembly 5, a second electromagnetic valve assembly 6, a first bottom valve assembly 7, a second intermediate cylinder assembly 8 and an oil cylinder assembly 9, and then the first electromagnetic valve assembly 5 and the second electromagnetic valve assembly 6 are arranged on the side of the oil cylinder assembly 9.

[0003] Therefore, it is necessary to develop a double-valve shock absorber to solve the above problems. SUMMARY

[0004] The purpose of the present application is to design a double-valve shock absorber to solve the above problems.

[0005] The present application achieves the above-mentioned purpose through the following technical solutions: A double-valve shock absorber comprises: a guide assembly; a first intermediate cylinder assembly; a piston rod assembly; the piston rod assembly is arranged in the guide assembly in a guided sliding manner, and a piston of the piston rod assembly is arranged in the working cylinder assembly; a working cylinder assembly; the working cylinder assembly is partially arranged in the first intermediate cylinder assembly; a first end of the working cylinder assembly is arranged on the guide assembly; a first electromagnetic valve assembly; the first electromagnetic valve assembly is arranged on the side wall of the oil cylinder assembly; a liquid outlet of the first electromagnetic valve assembly is connected with a third space between the outside of the first intermediate cylinder assembly and the inside of the oil cylinder assembly, and a liquid inlet of the first electromagnetic valve assembly is connected with a first end of a first space between the inside of the first intermediate cylinder assembly and the outside of the working cylinder assembly; a side wall of the working cylinder assembly is provided with an opening, the opening is connected with a second end of the first space and the inside of the working cylinder assembly and is arranged in a second space at the rear side of the piston; a second electromagnetic valve assembly; a first bottom valve assembly; second intermediate cylinder assembly; oil cylinder assembly; the first intermediate cylinder assembly is installed in the oil cylinder assembly; the guide assembly is installed in the first end of the oil cylinder assembly; second bottom valve assembly; the second bottom valve assembly is installed on the second end of the working cylinder assembly, and the second electromagnetic valve assembly is installed on the second end of the oil cylinder assembly; a plurality of inner vertical holes and a plurality of outer vertical holes are arranged axially on the second bottom valve assembly, and a side hole is arranged radially on the second bottom valve assembly; the first end of the inner vertical hole and the first end of the outer vertical hole are in communication with the inside of the working cylinder assembly, the second end of the outer vertical hole is in communication with the inner end of the side hole, the outer end of the side hole is in communication with the third space between the outside of the first intermediate cylinder assembly and the inside of the oil cylinder assembly and the liquid outlet of the second electromagnetic valve assembly, and the second end of the inner vertical hole is in communication with the liquid inlet of the second electromagnetic valve assembly.

[0006] The application has the following beneficial effects: Compared with the double-valve shock absorber in the prior art in which two electromagnetic valve assemblies are arranged on the side of the oil cylinder assembly, the application arranges one electromagnetic valve assembly at the bottom of the oil cylinder assembly, which can better adapt to the space limitation of the automobile chassis side, and in order to adapt to the structural layout, the application adopts a special structure of the second bottom valve assembly to realize the communication between the liquid in the working cylinder assembly and the third space in front of the piston and the path for the communication between the liquid in the working cylinder assembly and the liquid inlet of the second electromagnetic valve assembly from the radial direction. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 is a structural schematic view (partially sectioned) of a double-valve shock absorber in the prior art; Figure 2 is a structural schematic view (partially sectioned) of a double-valve shock absorber in the application; Figure 3 is a structural schematic view of the second bottom valve assembly in the application; Figure 4 is a sectional view of the second bottom valve assembly in the application; Figure 5 is a schematic view of the flow direction of liquid when the piston rod assembly performs a recovery motion in the application; Figure 6 is a schematic view of the flow direction of liquid when the piston rod assembly performs a compression motion in the application.

[0008] In the figure: 1-guide assembly; 2-first intermediate cylinder assembly; 3-piston rod assembly; 4-working cylinder assembly; 5-first electromagnetic valve assembly; 6-second electromagnetic valve assembly; 7-first bottom valve assembly; 8-second intermediate cylinder assembly; 9-oil cylinder assembly; 10-second bottom valve assembly; 11-outer vertical hole; 12-inner vertical hole; 13-connection hole; 14-side hole; 15-connection cavity. DETAILED DESCRIPTION

[0009] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Generally, the components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0010] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents the selected embodiments of the application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative work fall within the scope of protection of the present application.

[0011] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0012] In the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0013] In addition, the terms "first", "second", etc. are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0014] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0015] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0016] As Figures 2-6 shown, a double valve shock absorber comprises: The guide assembly 1; The first intermediate cylinder assembly 2; The piston rod assembly 3 is slidably arranged in the guide assembly 1, and the piston of the piston rod assembly 3 is arranged in the working cylinder assembly 4; The working cylinder assembly 4 is partially arranged in the first intermediate cylinder assembly 2; the first end of the working cylinder assembly 4 is arranged on the guide assembly 1; The first electromagnetic valve assembly 5 is arranged on the side wall of the oil cylinder assembly 9; the outlet of the first electromagnetic valve assembly 5 is connected to the third space between the outside of the first intermediate cylinder assembly 2 and the inside of the oil cylinder assembly 9, and the inlet of the first electromagnetic valve assembly 5 is connected to the first end of the first space between the inside of the first intermediate cylinder assembly 2 and the outside of the working cylinder assembly 4; the side wall of the working cylinder assembly 4 is provided with an opening, which is connected to the second end of the first space, the inside of the working cylinder assembly 4 and the second space arranged at the rear side of the piston; The second electromagnetic valve assembly 6; The first bottom valve assembly 7; The second intermediate cylinder assembly 8; The oil cylinder assembly 9; the first intermediate cylinder assembly 2 is arranged in the oil cylinder assembly 9; the guide assembly 1 is arranged in the first end of the oil cylinder assembly 9; The second bottom valve assembly 10; the second bottom valve assembly 10 is arranged on the second end of the working cylinder assembly 4, and the second electromagnetic valve assembly 6 is arranged on the second end of the oil cylinder assembly 9; the second bottom valve assembly 10 is axially provided with six inner vertical holes 12 and six outer vertical holes 11, and is radially provided with a side hole 14; the first end of the inner vertical hole 12 and the first end of the outer vertical hole 11 are connected to the inside of the working cylinder assembly 4; the second end of the outer vertical hole 11 is connected to the inner end of the side hole 14; the outer end of the side hole 14 is connected to the third space between the outside of the first intermediate cylinder assembly 2 and the inside of the oil cylinder assembly 9, and the outlet of the second electromagnetic valve assembly 6; the second end of the inner vertical hole 12 is connected to the inlet of the second electromagnetic valve assembly 6; the second end of the inner vertical hole 12 is connected to the connecting cavity 15 in the inside of the second bottom valve assembly 10, and the connecting cavity 15 is connected to the inlet of the second electromagnetic valve assembly 6.

[0017] In some embodiments, as shown in Figure 2 The inner walls of the two ends of the first intermediate cylinder assembly 2 and the outer wall of the working cylinder assembly 4 are both provided with sealing rings (not shown).

[0018] In some embodiments, as shown in Figure 2 The axis of the first electromagnetic valve assembly 5 is perpendicular to the axis of the second electromagnetic valve assembly 6.

[0019] In some embodiments, as shown in Figure 3 and 4As shown, the second bottom valve assembly 10 is cylindrical. The outer wall of the second bottom valve assembly 10 is provided with an annular step, and the top surface of the annular step is connected to the second end of the working cylinder assembly 4. The side hole 14 is formed in the side wall of the annular step with a larger diameter. The six inner vertical holes 12, the six outer vertical holes 11 and the six side holes 14 are evenly distributed around the axis of the second bottom valve assembly 10. The six outer vertical holes 11 are located outside the six inner vertical holes 12.

[0020] In some embodiments, as shown in Figure 3 and 4 As shown, the second bottom valve assembly 10 is provided with a connecting hole 13 at the axial center, which is used to install a valve plate assembly on the second bottom valve assembly 10. Since the valve plate assembly is a prior art, it will not be described here.

[0021] As shown in Figure 5 When the piston rod assembly 3 performs a recovery motion (as shown by the arrow direction in the figure), the piston will push the liquid to move in the direction of the small arrow. The liquid behind the piston enters the first space through the opening, and then passes through the first electromagnetic valve assembly 5 for damping adjustment. Due to the existence of the multi-flow direction second bottom valve assembly 10, the liquid can enter the fourth space between the front side of the piston and the inside of the working cylinder assembly 4 through the side hole 14, the outer vertical hole 11 of the second bottom valve assembly 10 in turn.

[0022] As shown in Figure 6 When the piston rod assembly 3 performs a compression motion (as shown by the arrow direction in the figure), the piston will push the liquid to move in the direction of the small arrow. The liquid in the fourth space passes through the inner vertical hole 12 of the second bottom valve assembly 10, and then enters the second electromagnetic valve assembly 6 through the connecting cavity 15 for damping adjustment. Due to the existence of the multi-flow direction bottom valve structure, the liquid flowing out of the second electromagnetic valve assembly 6 can enter the fourth space again through the third space, the side hole 14 and the outer vertical hole 11 in turn, so as to realize the circulation of the liquid.

[0023] The above is only a preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A dual-valve vibration damper, comprising: Guide assembly; First intermediate cylinder assembly; Piston rod assembly; The piston rod assembly is slidably positioned within the guide assembly, and the piston of the piston rod assembly is positioned inside the working cylinder assembly. Working cylinder assembly; the working cylinder assembly is partially installed within the first intermediate cylinder assembly; the first end of the working cylinder assembly is mounted on the guide assembly; A first solenoid valve assembly; the first solenoid valve assembly is installed on the side wall of the oil cylinder assembly; the outlet of the first solenoid valve assembly is connected to the third space between the outer side of the first intermediate cylinder assembly and the inner side of the oil cylinder assembly, and the inlet of the first solenoid valve assembly is connected to the first end of the first space between the inner side of the first intermediate cylinder assembly and the outer side of the working cylinder assembly; an opening is provided on the side wall of the working cylinder assembly, which connects the second end of the first space to the second space inside the working cylinder assembly and located behind the piston. Second solenoid valve assembly; First bottom valve assembly; Second intermediate cylinder assembly; Oil cylinder assembly; the first intermediate cylinder assembly is installed inside the oil cylinder assembly; The guide assembly is installed inside the first end of the oil tank assembly; The dual-valve vibration damper is characterized by further comprising: The second bottom valve assembly is mounted on the second end of the working cylinder assembly, and the second solenoid valve assembly is mounted on the second end of the oil cylinder assembly. The second bottom valve assembly has multiple inner vertical holes and multiple outer vertical holes axially arranged, and a side hole is radially arranged. The first end of the inner vertical hole and the first end of the outer vertical hole are connected to the inside of the working cylinder assembly. The second end of the outer vertical hole is connected to the inner end of the side hole. The outer end of the side hole is connected to the third space between the outside of the first intermediate cylinder assembly and the inside of the oil cylinder assembly, as well as the outlet of the second solenoid valve assembly. The second end of the inner vertical hole is connected to the inlet of the second solenoid valve assembly.

2. The dual-valve vibration damper according to claim 1, characterized in that, Sealing rings are provided between the inner walls of both ends of the first intermediate cylinder assembly and the outer wall of the working cylinder assembly.

3. A dual-valve vibration damper according to claim 1, characterized in that, The axis of the first solenoid valve assembly is perpendicular to the axis of the second solenoid valve assembly.

4. A dual-valve vibration damper according to claim 1, characterized in that, The second bottom valve assembly is cylindrical.

5. A dual-valve vibration damper according to claim 4, characterized in that, An annular step is provided on the outer wall of the second bottom valve assembly, and the platform of the annular step is connected to the second end of the working cylinder assembly.

6. A dual-valve vibration damper according to claim 5, characterized in that, Multiple inner vertical holes, multiple outer vertical holes, and multiple side holes are evenly distributed around the axis of the second bottom valve assembly.

7. A dual-valve vibration damper according to claim 6, characterized in that, Multiple outer vertical holes are placed outside multiple inner vertical holes.

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