A hydraulic bushing structure for a subframe

Abstract

The present invention discloses a hydraulic bushing structure for a subframe, which enables the damping fluid to smoothly transition in the flow channel, thereby reliably performing vibration damping operations and expanding the applicable range of the vibration damping amplitude. It includes: a rubber main spring, which includes a central skeleton, an outer peripheral skeleton, and a rubber body. The rubber body connects the central skeleton and the outer peripheral skeleton, and two independent open cavities are formed on both sides of the rubber body; a plastic flow channel assembly, which includes a first flow channel plate and a second flow channel plate. Both the first flow channel plate and the second flow channel plate are arc-shaped flow channel plates. A first inlet and outlet is provided at the upper position in the height direction at the arc-shaped end of the first flow channel plate. A first flow channel groove recessed in the thickness direction is provided on the outer surface of the first flow channel plate. A second inlet and outlet is provided at the lower position in the height direction at the arc-shaped end of the second flow channel plate. A second flow channel groove recessed in the thickness direction is provided on the outer surface of the second flow channel plate; and an outer sleeve.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic bushing structures, and specifically to a hydraulic bushing structure for a subframe. Background Art

[0002] The subframe is the skeleton of the front and rear axles and is a component of the front and rear axles. The subframe is not a complete vehicle frame but only a bracket that supports the front and rear axles and the suspension, enabling the axles and suspension to be connected to the "main vehicle frame" through it. The function of the subframe is to block vibrations and noises and reduce their direct entry into the carriage; existing subframes all perform vibration damping operations through hydraulic bushing structures.

[0003] A hydraulic bushing is a vibration damping component widely used in automobiles. Compared with traditional rubber bushings, the hydraulic bushing can provide greater viscous damping characteristics within a specific frequency range, improving the driving stability and safety of the vehicle.

[0004] Existing hydraulic bushings mainly consist of a rubber main spring, a plastic runner assembly, an outer sleeve, and damping fluid. Among them, the rubber main spring vulcanizes the central skeleton and the outer peripheral skeleton into a whole with rubber, and the plastic runner is used to circulate the viscous fluid in the two liquid chambers isolated on the rubber main spring. When the pressure difference between the two liquid chambers of the hydraulic bushing increases sharply, the pressure difference on both sides is adjusted through the flow of the damping fluid in the plastic runner. The existing positions of the entrances and exits of the plastic runner connecting the two liquid chambers correspond to the middle positions in the height direction of the liquid chambers. When actually adjusting the pressure difference, when the damping fluid receives the upper and lower pressures, the liquid chambers on both sides will squeeze the damping fluid into the corresponding entrances and exits, resulting in a large impact of the damping fluid in the runner, causing the outer sleeve that wraps the outer surface of the runner to bear a large impact force, leading to the need to thicken the outer sleeve; and when the impact force of the damping fluid in the runner is large, the damping fluid body will vibrate in the runner, further increasing the overall vibration, which will have a negative effect on vibration damping. In order to ensure that the hydraulic bushing can reliably perform vibration damping, it is urgent to develop a new hydraulic bushing structure. Summary of the Invention

[0005] In view of the above problems, the present invention provides a hydraulic bushing structure for a subframe, which enables the damping fluid to smoothly transition in the runner, thereby reliably performing vibration damping operations and expanding the applicable range of the vibration damping amplitude.

[0006] A hydraulic bushing structure for a subframe, characterized in that it includes:

[0007] A rubber main spring, which includes a central skeleton, an outer peripheral skeleton, and a rubber body. The rubber body connects the central skeleton and the outer peripheral skeleton, and two independent open cavities are formed on both sides of the rubber body;

[0008] Plastic runner assembly, which includes a first runner plate and a second runner plate. Both the first runner plate and the second runner plate are arc-shaped runner plates. At the upper position in the height direction of the arc-shaped end of the first runner plate, a first inlet and outlet is provided. On the outer surface of the first runner plate, a first runner groove concave in the thickness direction is provided. The first runner groove extends from the first inlet and outlet towards the middle position in the height direction of the arc-shaped other end of the first runner plate and forms a first guiding notch. At the lower position in the height direction of the arc-shaped end of the second runner plate, a second inlet and outlet is provided. On the outer surface of the second runner plate, a second runner groove concave in the thickness direction is provided. The second runner groove extends from the second inlet and outlet towards the middle position in the height direction of the arc-shaped other end of the second runner plate and forms a second guiding notch;

[0009] and an outer sleeve;

[0010] The exposed rubber body is divided into a top rubber mechanism, a central area rubber mechanism, and a bottom rubber mechanism in the height direction. The central area rubber mechanism includes a central partition and two arc-shaped baffles on both sides. The central partition, the two arc-shaped baffles, the top rubber mechanism, and the bottom rubber mechanism enclose two independent open cavities. The first runner plate and the second runner plate are respectively covered on the outer ends of their corresponding open cavities, making the two open cavities into corresponding liquid chambers. The first guiding notch and the second guiding notch are docked. The first runner groove and the second runner groove are combined to form a damping liquid runner groove. The outer sleeve is sleeved on the outer surfaces of the first runner plate and the second runner plate;

[0011] The outer sleeve is sleeved on the remaining outer circumference of the rubber main spring except for the upper flange positioning mechanism of the top rubber mechanism, and the inner wall of the corresponding area of the outer sleeve is closely attached to the outer surfaces of the first runner plate and the second runner plate.

[0012] Its further features are as follows:

[0013] The top rubber mechanism includes a lower outer peripheral sealing ring. The bottom rubber mechanism includes an upper outer peripheral sealing ring. The inner wall of the upper end of the outer sleeve is closely attached to the lower outer peripheral sealing ring of the top rubber mechanism. The inner wall of the lower end of the outer sleeve is closely attached to the upper outer peripheral sealing ring of the bottom rubber mechanism. The inner wall of the central area of the outer sleeve is closely attached to the outer surfaces of the first runner plate and the second runner plate to ensure reliable sealed assembly of the outer sleeve;

[0014] The first flow channel groove includes a first upper horizontal flow channel groove, a first descending flow channel groove, and a first middle horizontal flow channel groove. The second flow channel groove includes a second middle horizontal flow channel groove, a second descending flow channel groove, and a first lower horizontal flow channel groove. The first upper horizontal flow channel groove is connected to the first middle horizontal flow channel groove through the first descending flow channel groove. The first middle horizontal flow channel groove and the second middle horizontal flow channel groove are at the same height and are connected to each other in a combined state. The second middle horizontal flow channel groove is connected to the first lower horizontal flow channel groove through the second descending flow channel groove, which enables the reliable setting of the entire damping liquid flow channel groove;

[0015] The depths and widths of the first flow channel groove and the second flow channel groove are the same, ensuring stable and reliable pressure and no additional vibration;

[0016] Preferably, at least one partition bar is provided in the remaining flow channel grooves of the first flow channel groove except for the positions near the first inlet and outlet. The partition bar divides the first flow channel groove into several partition flow cavities with the same width. At least one partition bar is also provided in the remaining flow channel grooves of the second flow channel groove except for the positions near the second inlet and outlet. The partition bar divides the second flow channel groove into several partition flow cavities with the same width. The number of partition bars in the first flow channel groove and the second flow channel groove is the same. The partition flow cavities at the corresponding height positions of the first flow channel groove and the second flow channel groove are arranged in communication with each other. The outer surfaces of the corresponding partition bars are closely attached to the inner wall of the outer sleeve. The partition bar is used to reliably reduce the pressure of the damping liquid flowing into the damping liquid flow channel groove for the first time and to reduce the pressure of the damping liquid flowing out of the damping liquid flow channel groove again, improving the vibration damping effect of the entire hydraulic bushing;

[0017] The liquid chamber corresponding to the first flow channel plate is the first liquid chamber, and the liquid chamber corresponding to the second flow channel plate is the second liquid chamber; the two side arc-shaped baffles are the first arc-shaped baffle and the second arc-shaped baffle;

[0018] The first arc-shaped baffle corresponds to the splicing position of the first guiding notch of the first flow channel plate and the second guiding notch of the second flow channel plate. The outer surface of the second arc-shaped baffle is provided with a stop partition column, the outer surface of the stop partition column is an arc surface, and a first guiding cavity and a second guiding cavity are respectively arranged on both sides of the stop partition column. An inner concave profiling arc groove is arranged at the corresponding position of the outer sleeve, and the inner concave profiling arc groove is arranged to fit the outer surface of the stop partition column. The first guiding cavity and the second guiding cavity are separated to form two independent cavities. A first notch groove that is retracted inward is arranged in the middle of the height direction of the position area of the first flow channel plate corresponding to the second arc-shaped baffle. The first notch groove is retracted inward along the arc length direction to the area position of the first liquid chamber to form a first pressure relief channel opening. The first liquid chamber is connected to the first guiding cavity through the first pressure relief channel opening and the first notch groove. A second notch groove that is retracted inward is arranged in the middle of the height direction of the position area of the second flow channel plate corresponding to the second arc-shaped baffle. The second notch groove is retracted inward along the arc length direction to the area position of the second liquid chamber to form a second pressure relief channel opening. The second liquid chamber is connected to the second guiding cavity through the second pressure relief channel opening and the second notch groove. When the hydraulic pressure difference on both sides is too large and the pressure difference cannot be reliably relieved only through the damping liquid flow channel groove, the damping liquid on the side with a larger pressure will cause a gap to form between the inner concave profiling arc groove and the stop partition column, and then form a passage, so that part of the damping liquid can complete the pressure relief operation through the passage, which ensures the damping effect of the entire mechanism. And because the stop partition column is made of plastic material, it has a reliable reset function and will not affect the normal damping function under other working conditions;

[0019] Preferably, the stop partition column includes an upper partition column and a lower partition column. The upper partition column includes a first extended reinforcement part close to the first notch groove and a first inner end concave guiding part close to the second notch groove. Since the upper partition column mainly corresponds to the damping liquid for upper part pressure relief, it is set like this to ensure reliable pressure relief;

[0020] The lower partition column includes a second extended reinforcement part close to the second notch groove and a second inner end concave guiding part close to the first notch groove. Since the lower partition column mainly corresponds to the damping liquid for lower part pressure relief, it is set like this to ensure reliable pressure relief;

[0021] The inner cavity volume of the first liquid chamber is larger than the inner cavity volume of the second liquid chamber. During the actual damping process, the vibration transmitted from the bottom of the wheel to the vehicle body is generally greater than the pressure transmitted from the vehicle body to the bottom of the wheel. Therefore, the total volume of the damping liquid arranged in the first liquid chamber is larger than the total volume of the damping liquid arranged in the second liquid chamber to optimize the actual damping effect;

[0022] The different inner cavity volumes of the two liquid chambers are set by the central partition corresponding to the volumes of the raised blocks for each liquid chamber. The raised part of the central partition corresponding to the first liquid chamber is the first raised block, and the raised part of the central partition corresponding to the second liquid chamber is the second raised block. The volume of the first raised block is smaller than that of the second raised block, so that the inner cavity volume of the first liquid chamber is larger than that of the second liquid chamber;

[0023] Preferably, the inner convex thicknesses of the first raised block and the second raised block are different, and the inner convex thickness of the first raised block is smaller than that of the second raised block;

[0024] Both the first raised block and the second raised block are arranged in the middle position area in the height direction of the liquid chamber. A number of vertically penetrating concave diversion grooves are also arranged on the inner vertical surfaces of the first raised block and the second raised block. The exposed edges of the first raised block and the second raised block are all arc-transitioned to ensure the smooth passage of the damping liquid;

[0025] Thickened raised blocks are arranged on the inner surfaces of the corresponding liquid chambers of the first flow channel plate and the second flow channel plate. The height positions of the thickened raised blocks correspond to the corresponding height positions of the first raised block and the second raised block. The thickened raised blocks and the corresponding first raised block and second raised block form narrow flow channels, which enable the damping liquid passing through the narrow flow channels to reliably resolve vibrations and further ensure the vibration reduction effect.

[0026] After adopting the structure of the present invention, the damping liquid is injected into the two liquid chambers. The damping liquid flow channel groove is set with an upper inlet and outlet (the first inlet and outlet) and a lower inlet and outlet (the second inlet and outlet). The first flow channel groove and the second flow channel groove with the function of slow descent or slow ascent are combined to form a mutually communicating flow channel groove. When the hydraulic bushing structure is subjected to vibrations from the ground upwards, the damping liquid flows from the first inlet and outlet along the damping liquid flow channel groove to the second inlet and outlet. When the vibration is conducted from above to below, the damping liquid flows from the second inlet and outlet along the damping liquid flow channel groove to the first inlet and outlet. This enables the damping liquid in the damping liquid flow channel groove to flow unidirectionally and continuously switch the flow direction, and relieve pressure and reduce vibrations through the flow of the damping liquid; Since the damping liquid in the damping liquid flow channel groove is always flowing unidirectionally for damping and vibration reduction, it is ensured that the damping liquid in the damping liquid flow channel groove will not generate mixed-flow vibrations in the damping liquid flow channel groove, which enables the damping liquid to transition smoothly in the flow channel and then reliably perform the vibration reduction operation, expanding the applicable range of the vibration reduction amplitude. Description of the Drawings

[0027] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0028] Figure 2 is the three-dimensional exploded view of the present invention Figure 1 ;

[0029] Figure 3 Exploded perspective view of the present invention Figure 2 ;

[0030] Figure 4 is Figure 1 the top view of

[0031] Figure 5 is Figure 1 the front view of

[0032] Figure 6 is Figure 4 the schematic structural view of the A-A section of

[0033] Figure 7 is Figure 5 the schematic structural view of the B-B section of

[0034] Figure 8 is Figure 5 the schematic structural view of the C-C section of

[0035] Figure 9 is Figure 6 the schematic structural view of the D-D section of

[0036] Figure 10 Exploded perspective view of the present invention with the outer casing removed Figure 1 ;

[0037] Figure 11 Exploded perspective view of the present invention with the outer casing removed Figure 2 ;

[0038] Figure 12 Exploded perspective view of the present invention with the outer casing removed Figure 3 ;

[0039] Figure 13 Exploded perspective view of the present invention with the outer casing removed Figure 4 ;

[0040] Figure 14 Schematic structural view of the first flow channel groove provided with a partition bar

[0041] The names corresponding to the numbers in the figure are as follows:

[0042] Partition flow cavity 1, first liquid chamber 2, second liquid chamber 3, first arc-shaped baffle 4, second arc-shaped baffle 5, stop partition column 6, arc surface 601, upper partition column 602, lower partition column 603, first extended reinforcement part 604, first inner end concave guiding part 605, second extended reinforcement part 606, second inner end concave guiding part 607, first guiding cavity 7, second guiding cavity 8, thickening convex block 9, narrow flow channel 91;

[0043] Central skeleton 10, outer peripheral skeleton 20, rubber body 30, partition bar 40, first flow channel plate 50, first inlet / outlet 51, first flow channel groove 52, first upper horizontal flow channel groove 521, first descending flow channel groove 522, first middle horizontal flow channel groove 523, first guiding groove opening 53, first notch groove 54, first pressure relief channel opening 55, second flow channel plate 60, second inlet / outlet 61, second flow channel groove 62, second middle horizontal flow channel groove 621, second descending flow channel groove 622, first lower horizontal flow channel groove 623, second guiding groove opening 63, second notch groove 64, second pressure relief channel opening 65, central partition 70, first raised block 71, second raised block 72, concave guiding flow channel 73, damping liquid flow channel groove 80;

[0044] Rubber main spring 100, top rubber mechanism 101, first concave stop positioning groove 1011, central area rubber mechanism 102, bottom rubber mechanism 103, second concave stop positioning groove 1031, upper flanging positioning mechanism 104, lower outer peripheral sealing ring 105, upper outer peripheral sealing ring 106, plastic flow channel assembly 200, outer sleeve 300, concave profiling arc groove 301. Specific implementation mode

[0045] A hydraulic bushing structure of a subframe, see Figures 1 - 14 which includes a rubber main spring 100, a plastic flow channel assembly 200, and an outer sleeve 300;

[0046] The rubber main spring 100 includes a central skeleton 10, an outer peripheral skeleton 20, and a rubber body 30. The rubber body 30 connects the central skeleton 10 and the outer peripheral skeleton 20, and two independent open cavities are formed on both sides of the rubber body 30;

[0047] The plastic flow channel assembly 200 includes a first flow channel plate 50 and a second flow channel plate 60. Both the first flow channel plate 50 and the second flow channel plate 60 are arc-shaped flow channel plates. The first inlet / outlet 51 is arranged at the upper position in the height direction at the arc-shaped end of the first flow channel plate 50. The outer surface of the first flow channel plate 50 is provided with a first flow channel groove 52 that is concave in the thickness direction. The first flow channel groove 52 extends from the first inlet / outlet 51 towards the middle position in the height direction at the arc-shaped other end of the first flow channel plate 50 and forms a first guiding groove opening 53. The second inlet / outlet 61 is arranged at the lower position in the height direction at the arc-shaped end of the second flow channel plate 60. The outer surface of the second flow channel plate 60 is provided with a second flow channel groove 62 that is concave in the thickness direction. The second flow channel groove 62 extends from the second inlet / outlet 61 towards the middle position in the height direction at the arc-shaped other end of the second flow channel plate 60 and forms a second guiding groove opening 63;

[0048] The rubber main spring 100 is formed by vulcanizing the rubber body 30 to the central skeleton 10 and the outer peripheral skeleton 20. The exposed rubber body 30 is divided into a top rubber mechanism 101, a central area rubber mechanism 102, and a bottom rubber mechanism 103 in the height direction. The central area rubber mechanism 102 includes a central partition 70 and two arc-shaped baffles on both sides. The central partition 70, the two arc-shaped baffles on both sides, the top rubber mechanism 101, and the bottom rubber mechanism 103 enclose two independent open cavities. The first flow channel plate 50 and the second flow channel plate 60 are respectively installed on the outer ends of their corresponding open cavities, making the two open cavities into corresponding liquid chambers. The first guide slot 53 and the second guide slot 63 are docked, and the first flow channel groove 52 and the second flow channel groove 62 are combined to form a damping liquid flow channel groove 80. The outer sleeve 300 is sleeved on the outer surfaces of the first flow channel plate 50 and the second flow channel plate 60;

[0049] The outer sleeve 300 is sleeved on the remaining outer circumference of the rubber main spring 100 except for the upper flanging positioning mechanism 104 of the top rubber mechanism 101, and the inner wall of the corresponding area of the outer sleeve 300 is closely arranged against the outer surfaces of the first flow channel plate 50 and the second flow channel plate 60.

[0050] In a specific embodiment, the top rubber mechanism 101 includes a lower outer peripheral sealing ring 105, and the bottom rubber mechanism 103 includes an upper outer peripheral sealing ring 106. The inner wall of the upper end of the outer sleeve 300 is closely arranged against the lower outer peripheral sealing ring 105 of the top rubber mechanism 101, and the inner wall of the lower end of the outer sleeve 300 is closely arranged against the upper outer peripheral sealing ring 106 of the bottom rubber mechanism 103. The inner wall of the central area of the outer sleeve 300 is closely arranged against the outer surfaces of the first flow channel plate 50 and the second flow channel plate 60, ensuring reliable sealed assembly of the outer sleeve 300;

[0051] The first flow channel groove 52 includes a first upper horizontal flow channel groove 521, a first descending flow channel groove 522, and a first middle horizontal flow channel groove 523. The second flow channel groove 62 includes a second middle horizontal flow channel groove 621, a second descending flow channel groove 622, and a first lower horizontal flow channel groove 623. The first upper horizontal flow channel groove 521 is connected to the first middle horizontal flow channel groove 523 through the first descending flow channel groove 522. The first middle horizontal flow channel groove 523 and the second middle horizontal flow channel groove 621 are at the same height and are connected to each other in the combined state. The second middle horizontal flow channel groove 621 is connected to the first lower horizontal flow channel groove 623 through the second descending flow channel groove 622, which makes the entire damping liquid flow channel groove 80 be reliably arranged;

[0052] The depths and widths of the first flow channel groove 52 and the second flow channel groove 62 are the same, ensuring stable and reliable pressure without generating additional vibration.

[0053] Preferred embodiment (see Figure 14), except for the position near the first inlet / outlet 51, a separation bar 40 is further provided in the remaining flow channel grooves of the first flow channel groove 52. The separation bar 40 divides the first flow channel groove into two groups of separation flow cavities 1 with the same width. Except for the position near the second inlet / outlet 61, a separation bar 40 is further provided in the remaining flow channel grooves of the second flow channel groove 62. The separation bar 40 divides the second flow channel groove 62 into two groups of separation flow cavities 1 with the same width. The separation flow cavities 1 at the corresponding height positions of the first flow channel groove 52 and the second flow channel groove 62 are arranged in corresponding communication. The outer surface of the corresponding separation bar 40 is closely attached to the inner wall of the outer sleeve 300. The separation bar 40 is used to reliably reduce the pressure of the damping liquid flowing into the damping liquid flow channel groove 80 for the first time and further reduce the pressure of the damping liquid flowing out of the damping liquid flow channel groove 80 again, improving the vibration damping effect of the entire hydraulic bushing.

[0054] In a specific embodiment, the liquid chamber corresponding to the first flow channel plate 50 is the first liquid chamber 2, and the liquid chamber corresponding to the second flow channel plate 60 is the second liquid chamber 3; the arc-shaped baffles on both sides are the first arc-shaped baffle 4 and the second arc-shaped baffle 5;

[0055] The first arc-shaped baffle 4 is correspondingly arranged at the splicing position of the first guiding notch 53 of the first flow channel plate 50 and the second guiding notch 63 of the second flow channel plate 60. The outer surface of the second arc-shaped baffle 5 is provided with a stop partition column 6. The outer surface of the stop partition column 6 is an arc surface 601. The first guiding cavity 7 and the second guiding cavity 8 are respectively arranged on both sides of the stop partition column 6. The corresponding position of the outer sleeve 300 is provided with an inner concave profiling arc groove 301. The inner concave profiling arc groove 301 is arranged to fit the arc surface 601 of the stop partition column 6. The first guiding cavity 7 and the second guiding cavity 8 are separated to form two independent cavities. The middle part of the height direction of the position area of the first flow channel plate 50 corresponding to the second arc-shaped baffle 5 is provided with a retracted first notch groove 54. The first notch groove 54 retracts along the arc length direction to the area position of the first liquid chamber 2 to form a first pressure relief channel opening 55. The first liquid chamber 2 is connected to the first guiding cavity 7 through the first pressure relief channel opening 55 and the first notch groove 54. The middle part of the height direction of the position area of the second flow channel plate 60 corresponding to the second arc-shaped baffle 5 is provided with a retracted second notch groove 64. The second notch groove 64 retracts along the arc length direction to the area position of the second liquid chamber 3 to form a second pressure relief channel opening 65. The second liquid chamber 3 is connected to the second guiding cavity 8 through the second pressure relief channel opening 65 and the second notch groove 64. When the hydraulic pressure difference on both sides is too large and the pressure difference cannot be reliably relieved only through the damping liquid flow channel groove 80, the damping liquid on the side with a larger pressure will cause a gap to form between the inner concave profiling arc groove 301 and the stop partition column 6, thereby forming a passage, and then enabling part of the damping liquid to complete the pressure relief operation through the passage. This ensures the vibration damping effect of the entire mechanism, and since the stop partition column 6 is made of plastic material, it has a reliable reset function and will not affect the normal vibration damping function under other working conditions.

[0056] In a preferred embodiment, the stop partition column 6 includes an upper partition column 602 and a lower partition column 603. The upper partition column 602 includes a first extended reinforcement portion 604 near the first notch groove 54 and a first inner end concave guiding portion 605 near the second notch groove 64. Since the upper partition column 602 mainly corresponds to the damping liquid for upper pressure relief located in the upper position, such a setting ensures reliable pressure relief.

[0057] The lower partition column 603 includes a second extended reinforcement portion 606 near the second notch groove 64 and a second inner end concave guiding portion 607 near the first notch groove 54. Since the lower partition column 603 mainly corresponds to the damping liquid for lower pressure relief located in the lower position, such a setting ensures reliable pressure relief.

[0058] The structure of the stop partition column 6 enables the high-pressure damping liquid in the first liquid chamber 2 to be reliably pressure-relieved along the upper partition column 602, and enables the high-pressure damping liquid in the second liquid chamber 3 to be reliably pressure-relieved along the lower partition column 603. Reverse pressure relief is blocked and cannot occur due to the existence of the inner end concave guiding portion.

[0059] In a specific embodiment, the inner cavity volume of the first liquid chamber 2 is larger than that of the second liquid chamber 3. During actual vibration damping, the vibration transmitted from the bottom of the wheel to the vehicle body is generally greater than the pressure transmitted from the vehicle body to the bottom of the wheel. Therefore, the total volume of the damping liquid provided in the first liquid chamber 2 is larger than the total volume of the damping liquid provided in the second liquid chamber 3, optimizing the actual vibration damping effect.

[0060] In a specific embodiment, the different inner cavity volumes of the two liquid chambers are set by the volume of the raised blocks corresponding to each liquid chamber through the central partition. The raised portion of the central partition 70 corresponding to the first liquid chamber 2 is the first raised block 71, and the raised portion of the central partition 70 corresponding to the second liquid chamber 3 is the second raised block 72. The volume of the first raised block 71 is smaller than that of the second raised block 72, so that the inner cavity volume of the first liquid chamber 2 is larger than that of the second liquid chamber 3. During specific implementation, the raised positions of the first raised block 71 and the second raised block 72 are the same. Ensuring that the inner convex thickness of the first raised block 71 is smaller than that of the second raised block 72 can ensure that the inner cavity volume of the first liquid chamber 2 is larger than that of the second liquid chamber 3.

[0061] In a preferred embodiment, both the first raised block 71 and the second raised block 72 are provided in the middle position region in the height direction of the liquid chamber. A plurality of vertically penetrating concave diversion grooves 73 are also provided on the inner vertical surfaces of the first raised block 71 and the second raised block 72. The exposed edges of the first raised block 71 and the second raised block 72 are both in arc transition to ensure the smooth passage of the damping liquid.

[0062] The inner surfaces of the corresponding liquid chambers of the first flow channel plate 50 and the second flow channel plate 60 are both provided with thickening bumps 9. The height positions of the thickening bumps 9 correspond to the corresponding height positions of the first raised block 71 and the second raised block 72. The thickening bumps 9 and the corresponding first raised block 71 and second raised block 72 form a narrow flow channel 91, which enables the damping liquid passing through the narrow flow channel 91 to reliably resolve vibrations, further ensuring the damping effect.

[0063] During specific implementation, the lower edges of the top rubber mechanism 101 are respectively provided with first concave stop positioning grooves 1011 corresponding to the upper edge regions of the first flow channel plate 50 and the second flow channel plate 60. The upper edges of the bottom rubber mechanism 103 are respectively provided with second concave stop positioning grooves 1031 corresponding to the lower edge regions of the first flow channel plate 50 and the second flow channel plate 60. The upper edges and lower edges of the first flow channel plate 50 and the second flow channel plate 60 are respectively positioned in the first concave stop positioning grooves 1011 and the second concave stop positioning grooves 1031 at corresponding positions, and the end edges of the first flow channel plate 50 and the second flow channel plate 60 corresponding to the first guiding notch 53 and the second guiding notch 63 are closely arranged, ensuring quick and convenient assembly.

[0064] Its working principle is as follows: The damping liquid flow channel groove is set with an upper inlet and outlet (the first inlet and outlet) and a lower inlet and outlet (the second inlet and outlet). The first flow channel groove and the second flow channel groove with the function of slow descent or slow ascent are combined to form a mutually communicating flow channel groove. When receiving vibrations from the ground upwards, the bottom of the damping liquid is the stress surface for damping action. Eventually, the damping liquid located in the upper layer becomes the pressure-relieving liquid, and then the damping liquid in the upper layer flows from the first inlet and outlet along the damping liquid flow channel groove to the second inlet and outlet. When the vibration is transmitted from above to below, the damping liquid flows from the second inlet and outlet along the damping flow channel groove to the first inlet and outlet; when the vehicle body transmits vibrations to the ground, the upper stress surface of the damping liquid performs damping action. Eventually, the damping liquid located in the lower layer becomes the pressure-relieving liquid, and then the damping liquid in the lower layer flows from the second inlet and outlet along the damping liquid flow channel groove to the first inlet and outlet. When the vibration is transmitted from below to above, the damping liquid flows from the first inlet and outlet along the damping flow channel groove to the second inlet and outlet; this enables the damping liquid in the damping liquid flow channel groove to perform rapid one-way flow operation and continuously switch the flow direction, and reliably relieve pressure and damp vibrations through the flow of the damping liquid; since the damping liquid in the damping liquid flow channel groove is constantly performing one-way damping and vibration reduction flow, it ensures that the damping liquid in the damping liquid flow channel groove will not generate mixed flow vibrations in the damping liquid flow channel groove, enabling the damping liquid to smoothly transition in the flow channel and then reliably perform the damping operation; and it expands the applicable range of the amplitude of vibration reduction;

[0065] In addition, when the vibration is greater than the limit of reducing vibration only by flowing the damping liquid through the damping liquid flow channel grooves, the damping liquid at the compression end will cause a gap to form between the concave profiling arc groove and the stop spacer column, and then form a passage, so that part of the damping liquid can complete the pressure relief operation through the passage, which further expands the applicable range of the vibration reduction amplitude.

[0066] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0067] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydraulic bushing structure for a subframe, characterized in that, Comprising: The rubber main spring includes a central skeleton, an outer peripheral skeleton, and a rubber body. The rubber body connects the central skeleton and the outer peripheral skeleton, and two independent open cavities are formed on both sides of the rubber body; the plastic runner assembly includes a first runner plate and a second runner plate. Both the first runner plate and the second runner plate are arc-shaped runner plates. A first inlet and outlet is provided at the upper position in the height direction at the arc-shaped end of the first runner plate. A first runner groove recessed in the thickness direction is provided on the outer surface of the first runner plate. The first runner groove extends from the first inlet and outlet towards the middle position in the height direction at the arc-shaped other end of the first runner plate to form a first guiding notch. A second inlet and outlet is provided at the lower position in the height direction at the arc-shaped end of the second runner plate. A second runner groove recessed in the thickness direction is provided on the outer surface of the second runner plate. The second runner groove extends from the second inlet and outlet towards the middle position in the height direction at the arc-shaped other end of the second runner plate and forms a second guiding notch; The exposed rubber body is divided into a top rubber mechanism, a central area rubber mechanism, and a bottom rubber mechanism in the height direction. The central area rubber mechanism includes a central partition and two arc-shaped baffles on both sides. The central partition, the top rubber mechanism, and the bottom rubber mechanism enclose two independent open cavities. The first runner plate and the second runner plate are respectively covered on the outer ends of their corresponding open cavities, so that the two open cavities become corresponding liquid chambers. The first guiding notch and the second guiding notch are butted, and the first runner groove and the second runner groove are combined to form a damping liquid runner groove. The outer sleeve is sleeved on the outer surfaces of the first runner plate and the second runner plate; the outer sleeve is sleeved on the remaining outer circumference of the rubber main spring except for the upper flanging positioning mechanism of the top rubber mechanism, and the inner wall of the corresponding area of the outer sleeve is closely arranged against the outer surfaces of the first runner plate and the second runner plate; The liquid chamber corresponding to the first runner plate is the first liquid chamber, and the liquid chamber corresponding to the second runner plate is the second liquid chamber; the two arc-shaped baffles are the first arc-shaped baffle and the second arc-shaped baffle; the first arc-shaped baffle corresponds to the splicing position of the first guiding notch of the first runner plate and the second guiding notch of the second runner plate. A stop partition column is provided on the outer surface of the second arc-shaped baffle. The outer surface of the stop partition column is an arc surface. A first guiding cavity and a second guiding cavity are respectively provided on both sides of the stop partition column. An inner concave profiling arc groove is provided at the corresponding position of the outer sleeve. The inner concave profiling arc groove is arranged to fit the outer surface of the stop partition column. The first guiding cavity and the second guiding cavity are separated to form two independent cavities. A first notch groove recessed inwards is provided at the middle position in the height direction of the position area of the first runner plate corresponding to the second arc-shaped baffle. The first notch groove is recessed in the arc length direction to the area position of the first liquid chamber to form a first pressure relief channel opening. The first liquid chamber is connected to the first guiding cavity through the first pressure relief channel opening and the first notch groove; In the middle of the height direction of the position area of the second flow channel plate corresponding to the second arc-shaped baffle, a recessed second notch groove is provided. The second notch groove is recessed along the arc length direction to the surface area position of the second liquid chamber, forming a second pressure relief channel opening. The second liquid chamber is connected to the second notch groove through the second pressure relief channel opening to communicate with the second guiding chamber. The stop partition column includes an upper partition column and a lower partition column. The upper partition column includes a first extended reinforcement part close to the first notch groove and a first inner end concave guiding part close to the second notch groove. The lower partition column includes a second extended reinforcement part close to the second notch groove and a second inner end concave guiding part close to the first notch groove. The structure of the stop partition column enables the high-pressure damping liquid in the first liquid chamber to be reliably pressure-relieved along the upper partition column, and enables the high-pressure damping liquid in the second liquid chamber to be reliably pressure-relieved along the lower partition column, while the reverse pressure relief is blocked due to the inner end concave guiding part.

2. The hydraulic bushing structure of the subframe according to claim 1, wherein: The top rubber mechanism includes a lower outer peripheral sealing ring, and the bottom rubber mechanism includes an upper outer peripheral sealing ring. The inner wall of the upper end of the outer sleeve closely adheres to the lower outer peripheral sealing ring of the top rubber mechanism, and the inner wall of the lower end of the outer sleeve closely adheres to the upper outer peripheral sealing ring of the bottom rubber mechanism. The inner wall of the central area of the outer sleeve closely adheres to the outer surfaces of the first flow channel plate and the second flow channel plate.

3. The hydraulic bushing structure of the subframe according to claim 1, characterized in that: The first flow channel includes a first upper horizontal flow channel, a first descending flow channel, and a first middle horizontal flow channel. The second flow channel includes a second middle horizontal flow channel, a second descending flow channel, and a first lower horizontal flow channel. The first upper horizontal flow channel is connected to the first middle horizontal flow channel through the first descending flow channel. The first middle horizontal flow channel and the second middle horizontal flow channel are at the same height and are connected to each other in the combined state. The second middle horizontal flow channel is connected to the first lower horizontal flow channel through the second descending flow channel.

4. The hydraulic bushing structure of the subframe according to claim 1, characterized in that: Except for the positions close to the first inlet and outlet, at least one partition bar is further provided in the remaining flow channels of the first flow channel. The partition bar divides the first flow channel into several partition flow cavities with the same width. Except for the positions close to the second inlet and outlet, at least one partition bar is further provided in the remaining flow channels of the second flow channel. The partition bar divides the second flow channel into several partition flow cavities with the same width. The number of partition bars in the first flow channel and the second flow channel is the same. The partition flow cavities at the corresponding height positions of the first flow channel and the second flow channel are arranged to communicate with each other, and the outer surfaces of the corresponding partition bars closely adhere to the inner wall of the outer sleeve.

5. The hydraulic bushing structure of the subframe according to claim 1, characterized in that: The inner cavity volume of the first liquid chamber is larger than the inner cavity volume of the second liquid chamber.

6. The hydraulic bushing structure of the subframe according to claim 5, characterized in that: The different inner cavity volumes of the two liquid chambers are set by the volumes of the raised blocks corresponding to each liquid chamber through the central partition. The raised part of the central partition corresponding to the first liquid chamber is the first raised block, and the raised part of the central partition corresponding to the second liquid chamber is the second raised block. The volume of the first raised block is smaller than the volume of the second raised block, so that the inner cavity volume of the first liquid chamber is larger than the inner cavity volume of the second liquid chamber.

7. The hydraulic bushing structure of the subframe according to claim 6, characterized in that: The inner convex thicknesses of the first convex block and the second convex block are different, and the inner convex thickness of the first convex block is less than that of the second convex block; both the first convex block and the second convex block are arranged in the middle position area in the height direction of the liquid chamber, and a number of vertically penetrating concave diversion grooves are also arranged on the inner vertical surfaces of the first convex block and the second convex block, and the exposed edges of the first convex block and the second convex block are all arc-shaped transitions.

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