A passenger car shock absorber external electromagnetic valve oil channel connecting assembly and an assembling method thereof

Abstract

This invention relates to the field of automotive shock absorber manufacturing technology, and in particular to an external solenoid valve oil passage connection assembly for a passenger vehicle shock absorber and its assembly method. Regarding the external solenoid valve oil passage connection assembly for a passenger vehicle shock absorber, the solenoid valve is fixedly assembled with an oil reservoir; the oil passage connection assembly is assembled between the solenoid valve and a guide tube; the oil passage connection assembly includes a connecting frame, an upper sealing gasket, and a lower sealing gasket; the connecting frame has an oil passage hole and forms a positioning fit with the guide tube; the upper and lower sealing gaskets are respectively assembled on the upper and lower surfaces of the connecting frame. The connecting frame, through its own positioning fit structure, constrains the radial offset of the upper and lower sealing gaskets, regulates their compression deformation, and ensures uniform pressure on the sealing surfaces. The upper and lower sealing gaskets, relying on their own pre-tightening structure, compensate for the gap changes caused by the alternating vibration of the vehicle, maintain the hydraulic balance of the internal oil circuit of the shock absorber, and ensure that the damping force of the shock absorber has stable and continuous adjustment accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shock absorber manufacturing for vehicles, and particularly relates to an external electromagnetic valve oil channel connecting assembly of a passenger vehicle shock absorber and an assembling method thereof. BACKGROUND

[0002] The electric control shock absorber of a passenger vehicle controls the opening and closing size of an internal damping hole through an electromagnetic valve, adjusts the hydraulic oil flow between a working cavity and an oil storage cavity of the shock absorber, realizes continuous adjustable damping force, and thereby attenuates the impact vibration of a road surface transmitted to a vehicle body. The electromagnetic valve is directly assembled and fixed with the oil storage cylinder, and the oil channel connecting and sealing structure between the electromagnetic valve and the flow guide cylinder is a key abutting position of a hydraulic oil circuit, and the assembling precision and sealing stability thereof directly determine the precision of damping adjustment.

[0003] At present, the oil circuit abutting position of the electromagnetic valve and the flow guide cylinder generally adopts a split type assembling structure of independent sealing gasket abutting. In the assembling operation, the sealing gasket is only clamped between the end faces of the electromagnetic valve and the flow guide cylinder by manual work, and the abutting installation is completed by relying on manual experience, so that the sealing gasket is unevenly pressed after being assembled, and there is an obvious deviation in the compression amount of each region, and a regular and stable global sealing and pressing surface cannot be formed.

[0004] After the shock absorber is mounted on a vehicle and put into use, under the action of alternating vibration load generated by long-term driving of the vehicle, the region with insufficient gasket compression amount will gradually appear loose, causing local sealing failure, and further causing oil leakage and oil leakage faults of the oil circuit, damaging the internal hydraulic pressure balance of the shock absorber, and finally leading to problems such as decline of damping adjustment precision and failure of continuous damping adjustment function.

[0005] Therefore, it is urgent for technical personnel to solve the above problems. SUMMARY

[0006] The present application aims to provide an external electromagnetic valve oil channel connecting assembly of a passenger vehicle shock absorber, and aims to solve the problem that the electromagnetic valve and the flow guide cylinder adopt a split type independent gasket sealing structure in the prior art design, and uneven pressing of the gasket and large compression amount deviation are prone to occur in manual abutting assembly.

[0007] This invention relates to an external solenoid valve oil passage connection assembly for a passenger vehicle shock absorber, comprising an oil reservoir, a solenoid valve, a guide tube, and an oil passage connection component; the solenoid valve is assembled and connected to the oil reservoir; the oil passage connection component is disposed between the solenoid valve and the guide tube; the oil passage connection component includes a connecting frame, an upper sealing gasket, and a lower sealing gasket; the connecting frame is provided with an oil passage hole, which is positioned and fitted with the guide tube; both the upper and lower sealing gaskets are provided with through holes adapted to the oil passage hole, and are respectively disposed on the upper and lower surfaces of the connecting frame; after the external solenoid valve oil passage connection assembly for the passenger vehicle shock absorber is assembled, the upper sealing gasket is elastically compressed between the connecting frame and the solenoid valve, while the lower sealing gasket is elastically compressed between the connecting frame and the guide tube.

[0008] As a further improvement to the technical solution disclosed in this invention, the connecting frame is preferably an injection molded part, and a plurality of positioning claws are integrally formed on the side facing the guide tube; the positioning claws are inserted into the guide tube and form a locking engagement with the guide tube.

[0009] As a further improvement to the technical solution disclosed in this invention, the end of the positioning claw away from the connecting frame is provided with a snap-fit ​​barb; the snap-fit ​​barb fits against the inner wall of the guide tube and forms a snap-fit ​​engagement.

[0010] As a further improvement to the technical solution disclosed in this invention, the outer circumference of the connecting frame is integrally formed with a limiting flange, which is fitted into the end of the solenoid valve.

[0011] As a further improvement to the technical solution disclosed in this invention, the limiting flange has a ring structure, is coaxially arranged with the connecting frame, and its inner diameter is adapted to the outer diameter of the end of the solenoid valve.

[0012] As a further improvement to the technical solution disclosed in this invention, both the upper and lower sealing gaskets are made of elastic rubber, and the two are integrated with the connecting skeleton through a vulcanization process.

[0013] As a further improvement to the technical solution disclosed in this invention, in its natural state, the thickness of the upper sealing gasket is greater than the assembly gap between the connecting frame and the solenoid valve; after the oil passage connection assembly of the external solenoid valve of the passenger vehicle shock absorber is assembled, the upper sealing gasket is squeezed to form an elastic compression of 30% to 50%.

[0014] As a further improvement to the technical solution disclosed in this invention, under natural conditions, the thickness of the lower sealing gasket is greater than the assembly gap between the connecting frame and the guide tube; after the passenger car shock absorber external solenoid valve oil passage connection assembly is assembled, the elastic compression of the lower sealing gasket is 30% to 50%.

[0015] Furthermore, the present invention also discloses an assembly method for molding the above-mentioned external solenoid valve oil passage connection assembly of the passenger vehicle shock absorber, comprising the following steps: S1. The connecting skeleton is formed by injection molding, and the upper and lower sealing gaskets are fixed to the upper and lower surfaces of the connecting skeleton by vulcanization to form an oil passage connecting assembly. S2. Place the oil passage connection assembly between the solenoid valve and the guide tube, and complete the initial positioning and engagement of the connection frame and the guide tube; S3. Apply axial assembly pressure to the oil passage connection assembly to drive it to overcome the elastic resistance of the upper and lower sealing gaskets and to move it axially to one side of the guide tube. S4. After the oil passage connection assembly is moved to the limit assembly position and the positioning assembly is completed, the upper sealing gasket is compressed and clamped between the solenoid valve and the connecting frame, and the lower sealing gasket is compressed and clamped between the connecting frame and the guide tube, thus completing the overall assembly of the assembly.

[0016] As a further improvement to the technical solution disclosed in this invention, in step S3, the oil passage connection assembly is controlled to move to one side of the guide cylinder at a constant displacement speed of 2 to 6 mm / s to complete the press-fit feeding; in step S4, after the oil passage connection assembly is displaced to the limit position, a preset assembly pressure of 200 to 500 N is maintained and the pressure is held for 3 to 8 seconds, so that the upper sealing gasket and the lower sealing gasket can be fully deformed and fitted.

[0017] In practical applications, the external solenoid valve oil passage connection assembly for passenger vehicle shock absorbers disclosed in this invention can achieve at least the following beneficial technical effects, specifically: 1) In the assembly and manufacturing process, relying on the precise positioning and matching structure between the connecting frame and the guide tube, the radial positional offset of the upper and lower sealing gaskets during the assembly process is constrained, avoiding the assembly misalignment and positional deviation problems that are easily caused by manual alignment operations, so that the overall compression stroke of the upper and lower sealing gaskets remains uniform, thereby ensuring that the compression deformation of each area of ​​the two tends to be consistent, which is conducive to maintaining the uniform pressure state of the product sealing surface. 2) In actual use, thanks to the sealing pre-tightening surface pressure formed on the mating end faces of the solenoid valve and the connecting frame, and the connecting frame and the guide tube, the slight fluctuations in the structural fit clearance caused by alternating vibration loads during vehicle operation can be offset. This helps to improve problems such as local sealing surface pressure attenuation and loose structural fit, and continuously maintains the hydraulic stability of the internal oil circuit of the shock absorber, so as to ensure the accuracy of continuous adjustment of the damping force of the electronically controlled shock absorber. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced 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.

[0019] Figure 1 This is a schematic diagram of the structure of the external solenoid valve oil passage connection assembly for passenger vehicle shock absorbers disclosed in this invention.

[0020] Figure 2 This is a schematic diagram of the oil passage connection component in the external solenoid valve oil passage connection assembly of the passenger vehicle shock absorber disclosed in this invention.

[0021] Figure 3 This is a schematic diagram of the connecting frame in the external solenoid valve oil passage connection assembly of the passenger vehicle shock absorber disclosed in this invention.

[0022] Figure 4 yes Figure 3 A bottom view.

[0023] 1-Oil reservoir; 2-Solenoid valve; 3-Guide cylinder; 4-Oil passage connection assembly; 41-Connecting frame; 411-Positioning claw; 4111-Snap-fit ​​barb; 412-Limit flange; 42-Upper sealing gasket; 43-Lower sealing gasket. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 The diagram shows the structure of the external solenoid valve oil passage connection assembly for a passenger vehicle shock absorber disclosed in this invention. It can be seen that it mainly consists of an oil reservoir 1, a solenoid valve 2, a guide tube 3, and an oil passage connection assembly 4. The oil reservoir 1 is the external cylindrical component of the shock absorber, providing a mounting carrier for the solenoid valve 2. The solenoid valve 2 is fixedly assembled to the oil reservoir 1 via threads or fasteners. The guide tube 3 is positioned directly below the solenoid valve 2. The oil passage connection assembly 4 is sandwiched between the solenoid valve 2 and the guide tube 3, jointly undertaking the three design functions of oil passage connection, end face sealing, and assembly positioning.

[0025] like Figures 2 to 4 As shown, the oil passage connection assembly 4 includes a connecting frame 41, an upper sealing gasket 42, and a lower sealing gasket 43. The connecting frame 41 is an integral support body with an oil passage hole for oil flow. The connecting frame 41 and the guide tube 3 are fitted together using an insert type positioning, allowing for automatic centering during assembly without manual adjustment of the radial position. Both the upper sealing gasket 42 and the lower sealing gasket 43 have through holes coaxial with the oil passage hole. The upper sealing gasket 42 is attached to the upper surface of the connecting frame 41, and the lower sealing gasket 43 is attached to the lower surface of the connecting frame 41. After the assembly is completed, the upper sealing gasket 42 is compressed and filled between the upper end face of the connecting frame 41 and the lower end face of the solenoid valve 2, and the lower sealing gasket 43 is compressed and filled between the lower end face of the connecting frame 41 and the upper end face of the guide tube 3, forming two sets of independent end face sealing structures.

[0026] It should be noted that the connecting frame 41 is integrally molded using injection molding, and multiple circumferentially distributed positioning claws 411 are integrally molded on the side facing the guide tube 3. The positioning claws 411 extend axially downward and are inserted into the inner hole of the guide tube 3, forming a clearance fit with the inner wall of the guide tube 3 for circumferential positioning. The free end of the positioning claws 411 is provided with a snap hook 4111. The outer diameter of the snap hook 4111 is slightly larger than the inner hole diameter of the guide tube 3. After being pressed into place, it undergoes elastic deformation and rebounds, forming an axial snap lock with the inner end face of the guide tube 3, preventing the oil passage connection assembly 4 from axially loosening under vibration conditions.

[0027] like Figure 3 As shown, the outer circumference of the connecting frame 41 is integrally formed with an annular limiting flange 412; and the limiting flange 412 is coaxially arranged with the connecting frame 41, and its inner diameter is consistent with the outer diameter of the lower end of the solenoid valve 2; during assembly, the lower end of the solenoid valve 2 is embedded inside the limiting flange 412 to restrict the radial movement of the oil passage connecting assembly 4.

[0028] Both the upper sealing gasket 42 and the lower sealing gasket 43 are made of elastic rubber and are integrally bonded to the connecting skeleton 41 through a vulcanization process. There is no relative sliding, wrinkling, or misalignment between the two and the connecting skeleton 41. In its natural state, the thickness of the upper sealing gasket 42 is greater than the theoretical assembly gap between the upper end face of the connecting skeleton 41 and the lower end face of the solenoid valve 2. After the assembly is press-fitted, the upper sealing gasket 42 undergoes 30% to 50% elastic compression deformation, tightly adhering to the mating surface throughout. Similarly, the thickness of the lower sealing gasket 43 in its natural state is also greater than the theoretical assembly gap between the lower end face of the connecting skeleton 41 and the upper end face of the guide tube 3. After press-fitting, it forms 30% to 50% elastic compression, ensuring uniform surface pressure across the entire sealing surface without any localized underpressure areas.

[0029] This invention also discloses an assembly method for the assembly: S1. A connecting frame 41 with positioning claws 411 and limiting flanges 412 is integrally molded using injection molding process. The upper sealing gasket 42 and the lower sealing gasket 43 are respectively bonded to the upper and lower surfaces of the connecting frame 41 through vulcanization process to form an inseparable integral oil passage connecting assembly 4. S2. Place the oil passage connection assembly 4 between the solenoid valve 2 and the guide tube 3, align the positioning claw 411 with the guide tube 3, and complete the initial insertion positioning. S3. Apply constant pressure along the axial direction to the oil passage connection assembly 4, push the connection frame 41 to overcome the elastic reaction force of the upper sealing gasket 42 and the lower sealing gasket 43, and slowly move axially to one side of the guide tube 3. S4. When the snap hook 4111 at the end of the positioning claw 411 moves into the inner cavity of the guide tube 3 and completes the spring snap, the oil passage connection assembly 4 reaches the limit assembly position. At this time, the upper sealing gasket 42 is clamped between the solenoid valve 2 and the connecting frame 41 and reaches the set compression amount, and the lower sealing gasket 43 is clamped between the connecting frame 41 and the guide tube 3 and reaches the set compression amount. The assembly is completed.

[0030] During the press-fitting process, the oil passage connection assembly 4 moves at a constant speed of 2 to 6 mm / s to avoid excessive speed causing local shearing damage to the upper sealing gasket 42 and the lower sealing gasket 43; after it is in place, it maintains an axial pressure of 200 to 500 N and holds the pressure for 3 to 8 seconds to allow the upper sealing gasket 42 and the lower sealing gasket 43 to fully creep and fit together, thereby helping to eliminate micro gaps on the sealing surface.

[0031] In practical applications, the insertion positioning and snap-locking structure between the connecting frame 41 and the guide tube 3 constrains the radial offset of the upper sealing gasket 42 and the lower sealing gasket 43 during the assembly process, ensuring that the overall compression stroke of the sealing gasket remains consistent and the compression deformation of each area is uniform. The sealing surface formed by the upper sealing gasket 42 and the lower sealing gasket 43 is always under uniform pressure. Furthermore, the double sealing structure between the solenoid valve 2 and the connecting frame 41, and between the connecting frame 41 and the guide tube 3, forms a continuous sealing pre-tightening force to counteract the fluctuations in the fitting clearance caused by alternating vibrations during vehicle operation. This helps to maintain the continuous fit of the sealing surface, maintain the stable oil circuit pressure inside the shock absorber, and ensure that the damping force adjustment of the electronically controlled shock absorber remains continuous and precise.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An external solenoid valve oil passage connection assembly for a passenger vehicle shock absorber, comprising an oil reservoir, a solenoid valve, a guide tube, and an oil passage connection assembly; wherein the solenoid valve is assembled and connected to the oil reservoir; and the oil passage connection assembly is disposed between the solenoid valve and the guide tube, characterized in that, The oil passage connection assembly includes a connecting frame, an upper sealing gasket, and a lower sealing gasket; the connecting frame is provided with an oil passage hole, which is positioned and matched with the guide cylinder; the upper sealing gasket and the lower sealing gasket are respectively disposed on the upper surface and the lower surface of the connecting frame; after the oil passage connection assembly of the external solenoid valve of the passenger vehicle shock absorber is assembled, the upper sealing gasket is elastically compressed between the connecting frame and the solenoid valve, while the lower sealing gasket is elastically compressed between the connecting frame and the guide cylinder.

2. The passenger vehicle shock absorber external solenoid valve oil passage connection assembly according to claim 1, characterized in that, The connecting frame is an injection molded part, and multiple positioning claws are integrally formed on the side facing the guide tube; the positioning claws are inserted into the guide tube and form a locking engagement with the guide tube.

3. The passenger vehicle shock absorber external solenoid valve oil passage connection assembly according to claim 2, characterized in that, The positioning claw has a snap-fit ​​barb at one end away from the connecting frame; the snap-fit ​​barb fits against the inner wall of the guide tube and forms a snap-fit ​​engagement.

4. The passenger vehicle shock absorber external solenoid valve oil passage connection assembly according to claim 2, characterized in that, The outer circumference of the connecting frame is integrally formed with a limiting flange, which is fitted into the end of the solenoid valve.

5. The passenger vehicle shock absorber external solenoid valve oil passage connection assembly according to claim 4, characterized in that, The limiting flange has a ring structure, is coaxially arranged with the connecting frame, and its inner diameter is adapted to the outer diameter of the end of the solenoid valve.

6. The passenger vehicle shock absorber external solenoid valve oil passage connection assembly according to claim 1, characterized in that, Both the upper and lower sealing gaskets are made of elastic rubber, and they are integrated with the connecting skeleton through a vulcanization process.

7. The passenger vehicle shock absorber external solenoid valve oil passage connection assembly according to claim 6, characterized in that, In its natural state, the thickness of the upper sealing gasket is greater than the assembly gap between the connecting frame and the solenoid valve; after the passenger vehicle shock absorber external solenoid valve oil passage connection assembly is assembled, the upper sealing gasket is squeezed to form an elastic compression of 30% to 50%.

8. The passenger vehicle shock absorber external solenoid valve oil passage connection assembly according to claim 6, characterized in that, In its natural state, the thickness of the lower sealing gasket is greater than the assembly gap between the connecting frame and the guide tube; after the passenger vehicle shock absorber external solenoid valve oil passage connection assembly is assembled, the elastic compression of the lower sealing gasket is 30% to 50%.

9. An assembly method for molding the external solenoid valve oil passage connection assembly of a passenger vehicle shock absorber as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. The connecting skeleton is formed by injection molding, and the upper sealing gasket and the lower sealing gasket are fixed to the upper and lower surfaces of the connecting skeleton by vulcanization to form the oil passage connecting assembly. S2. The oil passage connection assembly is placed between the solenoid valve and the guide tube, and the connection frame and the guide tube are initially positioned and engaged. S3. Apply axial assembly pressure to the oil passage connection assembly to drive it to overcome the elastic resistance of the upper and lower sealing gaskets and to move axially to one side of the guide tube. S4. After the oil passage connection assembly is moved to the limit assembly position and the positioning assembly is completed, the upper sealing gasket is compressed and clamped between the solenoid valve and the connecting frame, and the lower sealing gasket is compressed and clamped between the connecting frame and the guide cylinder, thus completing the overall assembly of the assembly.

10. The assembly method according to claim 9, characterized in that, In step S3, the oil passage connection assembly is controlled to move towards the guide cylinder at a constant displacement speed of 2-6 mm / s to complete the press-fit feeding; in step S4, after the oil passage connection assembly is displaced to the limit position, a preset assembly pressure of 200-500 N is maintained and the pressure is held for 3-8 seconds, so that the upper sealing gasket and the lower sealing gasket can be fully deformed and fitted.

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