Radial liquid seal assembly, axial liquid seal assembly and bidirectional hydraulic bushing assembly

Abstract

The invention discloses a radial liquid seal assembly, an axial liquid seal assembly and a bidirectional hydraulic bushing assembly, and relates to the technical field of automobile parts, the radial liquid seal assembly comprises a first main spring, and further comprises a second main spring and a radial runner mechanism; the first main spring comprises a first outer pipe; the second main spring is arranged in the first outer pipe and comprises a first inner pipe, a first rubber body is arranged on the outer side of the first inner pipe, protruding rings are arranged at the positions, located at the two ends of the first inner pipe, of the first rubber body respectively, and the edges of the two protruding rings abut against the inner side wall of the first outer pipe to define a first cavity. Two separation blocks are oppositely arranged between the two convex rings to divide the first cavity into a left liquid chamber and a right liquid chamber; the radial flow channel mechanism is arranged in the first cavity, and the radial flow channel mechanism is provided with an inertia channel for communicating the left liquid chamber with the right liquid chamber; and a mounting space is formed between the lower end of the first outer pipe and the convex ring positioned below.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, in particular to a radial liquid seal assembly, an axial liquid seal assembly and a bidirectional hydraulic bushing assembly. Background Art

[0002] With the development of the automobile industry, cars are becoming more and more popular, and people's demand for car driving experience has expanded from early handling stability to ride comfort. Especially in new energy vehicles that do not have the vibration source of traditional fuel powertrains, vibration excitation from the road has become the primary factor affecting ride comfort. This also puts higher requirements on the NVH performance of the automobile suspension system. The bushing is an important component in the automobile suspension system to determine the handling stability and smoothness. It is of great significance to conduct in-depth research on this component. Compared with the linear dynamic characteristics of traditional rubber bushings, hydraulic bushings have nonlinear dynamic characteristics, which can provide a larger damping lag angle within a certain frequency range and play an excellent role in attenuating vibration; or provide a smaller dynamic stiffness characteristic within a certain frequency range, reduce the vibration transmission rate and play a role in noise reduction. It is precisely because of these good working performances that hydraulic bushings are more and more widely used in automobiles.

[0003] Traditional hydraulic bushings are limited by the structure of the bushing itself, and the direction of fluid resistance is generally radial, so they are widely used at the hinge of the suspension control arm. In recent years, a few manufacturers have also invented axial hydraulic bushings that can provide hydraulic characteristics in the axial direction. As the third-level vibration reduction system of the chassis suspension, the subframe bushing targets vibration sources including the resonance of the front and rear flexibility of the suspension (radial) and the unsprung resonance in the up and down directions (axial). Although there are various axial or radial hydraulic bushings currently on the market or developed by research institutions, they can only provide hydraulic characteristics in a single direction and solve NVH problems in a single direction.

[0004] The Chinese patent document "A bidirectional damping hydraulic bushing and its assembly method" (patent application number: 202311682647.2) and the Chinese patent document "An integral bidirectional hydraulic bushing" (202410680214.1) respectively disclose bidirectional hydraulic bushings. However, both types of bidirectional hydraulic bushings cannot effectively solve the resonance (radial) of the front and rear flexibility of the above-mentioned suspension and the unsprung resonance (axial) in the up and down directions. Summary of the invention

[0005] In view of the defects existing in the prior art, the purpose of the present invention is to provide a radial liquid seal assembly, an axial liquid seal assembly and a bidirectional hydraulic bushing assembly, which can realize both axial and radial hydraulic characteristics on the same bushing.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a radial liquid seal assembly, including a first main spring, a second main spring and a radial flow channel mechanism; the first main spring includes a first outer tube; the second main spring is arranged in the first outer tube, including a first inner tube, and a first rubber body is arranged on the outer side of the first inner tube, and the first rubber body is respectively provided with convex rings at the positions of the two ends of the first inner tube, and the edges of the two convex rings are abutted against the inner wall of the first outer tube and surround a first cavity; two partition blocks are relatively arranged between the two convex rings to divide the first cavity into a left liquid chamber and a right liquid chamber; the radial flow channel mechanism is arranged in the first cavity, and the radial flow channel mechanism is provided with an inertial channel for connecting the left liquid chamber and the right liquid chamber; an installation space is formed between the lower end of the first outer tube and the convex ring located below.

[0007] A further improvement is that: a rubber layer is provided on the inner side wall of the first outer tube, and the upper end of the first outer tube is bent outward to form a first flange, and the first flange is provided with a plurality of positioning grooves.

[0008] A further improvement is that a first framework is arranged inside the two convex rings and the two dividing blocks.

[0009] A further improvement is that the radial flow channel mechanism is composed of two oppositely arranged semicircular ring bodies, the inner surface of the semicircular ring body is provided with a protrusion at the position of the left liquid chamber or the right liquid chamber, and the outer surface of the semicircular ring body is provided with an inertia channel.

[0010] The present invention also provides an axial liquid seal assembly, comprising a third main spring and a fourth main spring arranged opposite to each other up and down, and also comprising an axial flow channel mechanism;

[0011] The third main spring comprises a second inner tube, a second rubber body is arranged outside the upper end of the second inner tube, and a reduced diameter portion is arranged at the lower end of the second inner tube;

[0012] The fourth main spring comprises a second outer tube, the second outer tube is plugged into the reduced diameter portion of the second inner tube, and a third rubber body is disposed outside the lower end of the second outer tube;

[0013] The axial flow channel mechanism comprises a third outer tube and a flow channel plate;

[0014] The ends of the second rubber body and the third rubber body are respectively abutted against the inner wall of the third outer tube to enclose a second cavity. The flow channel plate is arranged in the second cavity and divides it into an upper liquid chamber and a lower liquid chamber, and the flow channel plate is provided with a flow channel for connecting the upper liquid chamber and the lower liquid chamber.

[0015] A further improvement is that: a second frame is arranged in the second rubber body, and a first annular groove is arranged on the bottom surface of the second rubber body; a third frame is arranged in the third rubber body, and a second annular groove is arranged on the top surface of the third rubber body.

[0016] A further improvement is that a third concave annular groove is provided in the middle of the third outer tube, and a plurality of limiting holes are opened in the third annular groove.

[0017] A further improvement is that the flow channel plate is composed of two plate bodies arranged opposite to each other up and down, and the two plate bodies are provided with flow channel grooves for forming the flow channel.

[0018] A further improvement is that a second flange is provided at the end of the plate body, and the second flange is connected to the third outer tube through a fourth rubber body.

[0019] The present invention also provides a bidirectional hydraulic bushing assembly, comprising a radial liquid seal assembly as described above and an axial liquid seal assembly as described above, wherein the axial liquid seal assembly is installed in the installation space of the radial liquid seal assembly, and an avoidance space is reserved between the radial liquid seal assembly and the axial liquid seal assembly.

[0020] The beneficial effects of the present invention are:

[0021] The invention can realize hydraulic characteristics in both axial and radial directions on the same bushing by cooperating with each other through the radial liquid seal assembly and the axial liquid seal assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional diagram of a radial liquid seal assembly in an embodiment of the present invention;

[0023] Figure 2 is a longitudinal sectional view of a radial liquid seal assembly according to an embodiment of the present invention;

[0024] Figure 3 is a transverse cross-sectional view of a radial liquid seal assembly according to an embodiment of the present invention;

[0025] Figure 4 Schematic diagram of the structure of the first main spring in an embodiment of the present invention;

[0026] Figure 5 is a three-dimensional diagram of a second main spring in an embodiment of the present invention;

[0027] Figure 6 is a front view of a second main spring in an embodiment of the present invention;

[0028] Figure 7 for Figure 6 A longitudinal cross-sectional view of

[0029] Figure 8 for Figure 6 Side view of

[0030] Fig. 9 for Figure 8 A transverse cross-sectional view of

[0031] Fig.10A three-dimensional diagram of a semicircular ring in an embodiment of the present invention;

[0032] Fig.11 It is a front view of a semicircular ring body in an embodiment of the present invention;

[0033] Fig.12 A three-dimensional diagram of an axial liquid seal assembly in an embodiment of the present invention;

[0034] Fig.13 is a cross-sectional view of an axial liquid seal assembly in an embodiment of the present invention;

[0035] Fig.14 is a schematic structural diagram of a third main spring in an embodiment of the present invention;

[0036] Fig.15 is a cross-sectional view of a third main spring in an embodiment of the present invention;

[0037] Fig.16 is a schematic structural diagram of a fourth main spring in an embodiment of the present invention;

[0038] Fig.17 is a cross-sectional view of a fourth main spring in an embodiment of the present invention;

[0039] Fig.18 It is a structural schematic diagram of the axial flow channel mechanism in an embodiment of the present invention;

[0040] Fig.19 is a cross-sectional view of the axial flow channel mechanism in an embodiment of the present invention;

[0041] Fig. 20 This is a schematic diagram of the structure of the third outer tube in an embodiment of the present invention;

[0042] Fig.21 It is a structural schematic diagram of a plate body in an embodiment of the present invention;

[0043] Fig. 22 is a cross-sectional view of a plate body in an embodiment of the present invention;

[0044] Fig.23 It is a structural schematic diagram of a bidirectional hydraulic bushing assembly in an embodiment of the present invention;

[0045] Fig.24 It is a front view of a bidirectional hydraulic bushing assembly in an embodiment of the present invention;

[0046] Fig.25 It is a cross-sectional view of a bidirectional hydraulic bushing assembly in an embodiment of the present invention.

[0047] Reference numerals:

[0048] 1- radial liquid seal assembly; 11- first main spring; 111- first outer tube; 112- rubber layer; 113- first flange; 114- positioning groove; 12- second main spring; 121- first inner tube; 122- first rubber body; 123- convex ring; 124- separator block; 125- first skeleton; 13- radial flow channel mechanism; 131- semicircular ring body; 132- convex block; 133- inertia channel; 14- left liquid chamber; 15- right liquid chamber; 16- installation space;

[0049] 2-axial liquid seal assembly; 21-third main spring; 211-second inner tube; 212-second rubber body; 213-first annular groove; 214-reduced diameter portion; 215-second skeleton; 22-fourth main spring; 221-second outer tube; 222-third rubber body; 223-second annular groove; 224-third skeleton; 23-axial flow channel mechanism; 231-plate body; 232-flow channel groove; 233-second flange; 234-third outer tube; 235-third annular groove; 236-limiting hole; 237-fourth rubber body; 24-upper liquid chamber; 25-lower liquid chamber. DETAILED DESCRIPTION

[0050] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0051] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, "several" and "a number" mean two or more, unless otherwise clearly and specifically defined.

[0053] The following is a further description of the specific embodiments of the present invention in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the present invention are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the present invention, but cannot be understood as limiting the present invention.

[0054] See also Figure 1 to Figure 3 As shown, an embodiment of the present invention provides a radial liquid seal assembly, including a first main spring 11 , a second main spring 12 and a radial flow channel mechanism 13 .

[0055] See also Figure 4 As shown, the first main spring 11 includes a first outer tube 111 ; specifically, the inner side wall of the first outer tube 111 is provided with a rubber layer 112 , and the upper end of the first outer tube 111 is bent outward to form a first flange 113 , and the first flange 113 is provided with a plurality of positioning grooves 114 .

[0056] See also Figures 5 to 9 As shown, the second main spring 12 is arranged in the first outer tube 111, including a first inner tube 121, and a first rubber body 122 is arranged on the outer side of the first inner tube 121, and the first rubber body 122 is respectively provided with convex rings 123 at the two ends of the first inner tube 121, and the edges of the two convex rings 123 are abutted against the inner wall of the first outer tube 111 and surround a first cavity; two dividing blocks 124 are relatively arranged between the two convex rings 123, and the first cavity is divided into a left liquid chamber 14 and a right liquid chamber 15; specifically, a first skeleton 125 is arranged in the two convex rings 123 and the two dividing blocks 124.

[0057] See also Figure 10-11 As shown, the radial flow channel mechanism 13 is arranged in the first cavity, and the radial flow channel mechanism 13 is provided with an inertial channel 133 for connecting the left liquid chamber 14 and the right liquid chamber 15; specifically, the radial flow channel mechanism 13 is composed of two oppositely arranged semi-circular ring bodies 131, and the inner circular surface of the semi-circular ring body 131 is located at the position of the left liquid chamber 14 or the right liquid chamber 15 and a protrusion 132 is provided, and the outer circular surface of the semi-circular ring body 131 is provided with an inertial channel 133.

[0058] An installation space 16 is formed between the lower end of the first outer tube 111 and the convex ring 123 located below.

[0059] See also Figure 12-13 As shown, an embodiment of the present invention further provides an axial liquid seal assembly, including a third main spring 21 and a fourth main spring 22 arranged opposite to each other in the upper and lower parts, and also includes an axial flow channel mechanism 23.

[0060] See also Figure 14-15As shown, the third main spring 21 includes a second inner tube 211, a second rubber body 212 is disposed outside the upper end of the second inner tube 211, and a reduced diameter portion 214 is disposed at the lower end of the second inner tube 211; specifically, a second skeleton 215 is disposed inside the second rubber body 212, and a first annular groove 213 is disposed on the bottom surface of the second rubber body 212;

[0061] See also Figure 16-17 As shown, the fourth main spring 22 includes a second outer tube 221, which is plugged into the reduced diameter portion 214 of the second inner tube 211, and a third rubber body 222 is provided on the outer side of the lower end of the second outer tube 221; a third skeleton 224 is provided in the third rubber body 222, and a second annular groove 223 is provided on the top surface of the third rubber body 222.

[0062] See also Figure 18 to Figure 22 As shown, the axial flow channel mechanism 23 includes a third outer tube 234 and a flow channel plate; the ends of the second rubber body 212 and the third rubber body 222 are respectively abutted against the inner wall of the third outer tube 234 and enclose a second cavity, the flow channel plate is arranged in the second cavity and divides it into an upper liquid chamber 24 and a lower liquid chamber 25, and the flow channel plate is provided with a flow channel for connecting the upper liquid chamber 24 and the lower liquid chamber 25. Specifically, a concave third annular groove 235 is provided in the middle of the third outer tube 234, and a plurality of limiting holes 236 are opened in the third annular groove 235. The flow channel plate is composed of two plate bodies 231 arranged opposite to each other up and down, and the two plate bodies 231 are oppositely provided with flow channel grooves 232 for forming a flow channel. A second flange 233 is provided at the end of the plate body 231, and the second flange 233 is connected to the third outer tube 234 through a fourth rubber body 237. The upper and lower walls of the third outer tube 234 of the axial flow channel mechanism 23 are straightened before assembly, or a certain angle is reserved for easy assembly. After the axial flow channel mechanism 23 and the third main spring and the fourth main spring are assembled, the two ends of the third outer tube are closed inward, thereby assembling several components into a large assembly.

[0063] See also Figure 23 to Figure 25 As shown, an embodiment of the present invention further provides a bidirectional hydraulic bushing assembly, including a radial liquid seal assembly 1 as described above and an axial liquid seal assembly 2 as described above, wherein the axial liquid seal assembly 2 is installed in the installation space 16 of the radial liquid seal assembly 1, and an escape space is reserved between the radial liquid seal assembly 1 and the axial liquid seal assembly 2, thereby ensuring that the hydraulic characteristics between the axial and radial types are not interfered with or restricted.

[0064] When the radial liquid seal assembly 1 and the axial liquid seal assembly 2 are assembled, there is an interference fit between the first inner tube and the second inner tube; there is an interference fit between the second main spring and the axial flow channel mechanism; and the barb structure at the end of the second main spring clamps the outer wall of the axial flow channel mechanism, thereby ensuring that the radial liquid seal assembly 1 and the axial liquid seal assembly 2 are vulcanized into one. The second main spring is designed with sealing ribs or other sealing structures at the contact point with the first main spring to ensure the effective sealing of the damping liquid in the radial liquid seal assembly; according to customer needs, the shape of the liquid chamber, the shape of the flow channel, the hardness of the rubber, etc. can be changed to obtain various required dynamic characteristics of the bushing; according to the customer's static stiffness requirements, the static stiffness of the bushing can be changed by adjusting the shape of each part and the hardness of the rubber; the molding process of each component of the bushing is simple and diversified, and can be appropriately selected according to the use environment, such as: some other assembly parts can be added to the inner tube and end face of the bushing for axial or radial limit of the bushing; this flow channel assembly can be composed of various forms, such as aluminum alloy casting integrated flow channel, nylon injection molding, etc.; the main filling process used by this bidirectional hydraulic bushing is wet filling. It can also be designed as dry filling according to actual product design requirements.

[0065] The working principle of the present invention is:

[0066] When the bushing is subjected to external radial excitation, the rubber main spring is displaced, causing the pressure difference in the left and right liquid chambers to fluctuate, and the liquid flows back and forth in the two liquid chambers through the flow channel. The vibrating liquid column (inertial mass) in the flow channel is linked with the expansion stiffness of the liquid chamber, forming a sub-vibration system in the rubber main spring vibration system, and achieving high damping dynamic characteristics in the resonant frequency band through resonance phenomenon. Thus, radial hydraulic characteristics are provided.

[0067] When the bushing is subjected to external axial excitation, the rubber main spring is displaced, causing the pressure difference between the upper and lower liquid chambers to fluctuate, and the liquid flows back and forth between the two liquid chambers through the flow channel. The vibrating liquid column (inertial mass) in the flow channel is linked with the expansion stiffness of the liquid chamber, forming a sub-vibration system in the rubber main spring vibration system, and achieving high damping dynamic characteristics in the resonant frequency range through resonance phenomenon. This provides axial hydraulic characteristics for the bushing.

[0068] In the description of the specification, the description with reference to the terms "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention, and the schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0069] Through the description of the above structure and principle, technicians in the relevant technical field should understand that the present invention is not limited to the above-mentioned specific implementation methods. Improvements and substitutions based on the present invention using the well-known technology in the field all fall within the protection scope of the present invention and should be defined by the claims.

Claims

1. A radial liquid seal assembly, comprising a first main spring (11), characterized in that: It also includes a second main spring (12) and a radial flow channel mechanism (13); The first main spring (11) comprises a first outer tube (111); The second main spring (12) is arranged in the first outer tube (111), comprising a first inner tube (121), and a first rubber body (122) is arranged on the outer side of the first inner tube (121); the first rubber body (122) is respectively provided with convex rings (123) at the two ends of the first inner tube (121); the edges of the two convex rings (123) are pressed against the inner wall of the first outer tube (111) and surround a first cavity; two partition blocks (124) are arranged opposite to each other between the two convex rings (123), dividing the first cavity into a left liquid chamber (14) and a right liquid chamber (15); The radial flow channel mechanism (13) is arranged in the first cavity, and the radial flow channel mechanism (13) is provided with an inertial channel (133) for connecting the left liquid chamber (14) and the right liquid chamber (15); An installation space (16) is formed between the lower end of the first outer tube (111) and the convex ring (123) located below.

2. The radial liquid seal assembly according to claim 1, characterized in that: The inner side wall of the first outer tube (111) is provided with a rubber layer (112), and the upper end of the first outer tube (111) is bent outward to form a first flange (113), and the first flange (113) is provided with a plurality of positioning grooves (114).

3. The radial liquid seal assembly according to claim 1, characterized in that: A first framework (125) is arranged inside the two convex rings (123) and the two partition blocks (124).

4. The radial liquid seal assembly according to claim 1, characterized in that: The radial flow channel mechanism (13) is composed of two semicircular ring bodies (131) arranged opposite to each other, wherein the inner surface of the semicircular ring body (131) is provided with a protrusion (132) at a position located in the left liquid chamber (14) or the right liquid chamber (15), and the outer surface of the semicircular ring body (131) is provided with an inertia channel (133).

5. An axial liquid seal assembly, comprising a third main spring (21) and a fourth main spring (22) disposed opposite to each other in an upper and lower direction, characterized in that: Also includes an axial flow channel mechanism (23); The third main spring (21) comprises a second inner tube (211), a second rubber body (212) is arranged outside the upper end of the second inner tube (211), and a reduced diameter portion (214) is arranged at the lower end of the second inner tube (211); The fourth main spring (22) comprises a second outer tube (221), the second outer tube (221) is plugged into the reduced diameter portion (214) of the second inner tube (211), and a third rubber body (222) is arranged on the outer side of the lower end of the second outer tube (221); The axial flow channel mechanism (23) comprises a third outer tube (234) and a flow channel plate; The ends of the second rubber body (212) and the third rubber body (222) are respectively abutted against the inner wall of the third outer tube (234) to enclose a second cavity, the flow channel plate is arranged in the second cavity and divides the cavity into an upper liquid chamber (24) and a lower liquid chamber (25), and the flow channel plate is provided with a flow channel for connecting the upper liquid chamber (24) and the lower liquid chamber (25).

6. The axial liquid seal assembly according to claim 5, characterized in that: A second skeleton (215) is arranged inside the second rubber body (212), and a first annular groove (213) is arranged on the bottom surface of the second rubber body (212); a third skeleton (224) is arranged inside the third rubber body (222), and a second annular groove (223) is arranged on the top surface of the third rubber body (222).

7. The axial liquid seal assembly according to claim 5, characterized in that: A third concave annular groove (235) is provided in the middle of the third outer tube (234), and a plurality of limiting holes (236) are formed in the third annular groove (235).

8. The axial liquid seal assembly according to claim 5, characterized in that: The flow channel plate is composed of two plate bodies (231) arranged opposite to each other up and down, and the two plate bodies (231) are provided with flow channel grooves (232) for forming a flow channel opposite to each other.

9. The axial liquid seal assembly according to claim 8, characterized in that: A second flange (233) is provided at the end of the plate body (231), and the second flange (233) is connected to the third outer tube (234) via a fourth rubber body (237).

10. A bidirectional hydraulic bushing assembly, characterized in that: It comprises a radial liquid seal assembly (1) as described in any one of claims 1 to 4 and an axial liquid seal assembly (2) as described in any one of claims 5 to 9, wherein the axial liquid seal assembly (2) is installed in the installation space (16) of the radial liquid seal assembly (1), and an escape space is reserved between the radial liquid seal assembly (1) and the axial liquid seal assembly (2).

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